This update for xen to version 4.5.3 fixes the several issues. These security issues were fixed :

  - CVE-2016-6258: Potential privilege escalation in PV     guests (XSA-182) (bsc#988675).

  - CVE-2016-6259: Missing SMAP whitelisting in 32-bit     exception / event delivery (XSA-183) (bsc#988676).

  - CVE-2016-5337: The megasas_ctrl_get_info function     allowed local guest OS administrators to obtain     sensitive host memory information via vectors related to     reading device control information (bsc#983973).

  - CVE-2016-5338: The (1) esp_reg_read and (2)     esp_reg_write functions allowed local guest OS     administrators to cause a denial of service (QEMU     process crash) or execute arbitrary code on the host via     vectors related to the information transfer buffer     (bsc#983984).

  - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c     might have allowed local guest OS administrators to     cause a denial of service (out-of-bounds write and QEMU     process crash) via vectors related to reading from the     information transfer buffer in non-DMA mode     (bsc#982960).

  - CVE-2016-4453: The vmsvga_fifo_run function allowed     local guest OS administrators to cause a denial of     service (infinite loop and QEMU process crash) via a VGA     command (bsc#982225).

  - CVE-2016-4454: The vmsvga_fifo_read_raw function allowed     local guest OS administrators to obtain sensitive host     memory information or cause a denial of service (QEMU     process crash) by changing FIFO registers and issuing a     VGA command, which triggered an out-of-bounds read     (bsc#982224).

  - CVE-2016-5126: Heap-based buffer overflow in the     iscsi_aio_ioctl function allowed local guest OS users to     cause a denial of service (QEMU process crash) or     possibly execute arbitrary code via a crafted iSCSI     asynchronous I/O ioctl call (bsc#982286).

  - CVE-2016-5105: Stack information leakage while reading     configuration (bsc#982024).

  - CVE-2016-5106: Out-of-bounds write while setting     controller properties (bsc#982025).

  - CVE-2016-5107: Out-of-bounds read in     megasas_lookup_frame() function (bsc#982026).

  - CVE-2016-4963: The libxl device-handling allowed local     guest OS users with access to the driver domain to cause     a denial of service (management tool confusion) by     manipulating information in the backend directories in     xenstore (bsc#979670).

  - CVE-2016-4962: The libxl device-handling allowed local     OS guest administrators to cause a denial of service     (resource consumption or management facility confusion)     or gain host OS privileges by manipulating information     in guest controlled areas of xenstore (bsc#979620).

  - CVE-2016-4952: Out-of-bounds access issue in     pvsci_ring_init_msg/data routines (bsc#981276).

  - CVE-2014-3672: The qemu implementation in libvirt Xen     allowed local guest OS users to cause a denial of     service (host disk consumption) by writing to stdout or     stderr (bsc#981264).

  - CVE-2016-4441: The get_cmd function in the 53C9X Fast     SCSI Controller (FSC) support did not properly check DMA     length, which allowed local guest OS administrators to     cause a denial of service (out-of-bounds write and QEMU     process crash) via unspecified vectors, involving an     SCSI command (bsc#980724).

  - CVE-2016-4439: The esp_reg_write function in the 53C9X     Fast SCSI Controller (FSC) support did not properly     check command buffer length, which allowed local guest     OS administrators to cause a denial of service     (out-of-bounds write and QEMU process crash) or     potentially execute arbitrary code on the host via     unspecified vectors (bsc#980716).

  - CVE-2016-3710: The VGA module improperly performed     bounds checking on banked access to video memory, which     allowed local guest OS administrators to execute     arbitrary code on the host by changing access modes     after setting the bank register, aka the 'Dark Portal'     issue (bsc#978164).

  - CVE-2016-3960: Integer overflow in the x86 shadow     pagetable code allowed local guest OS users to cause a     denial of service (host crash) or possibly gain     privileges by shadowing a superpage mapping     (bsc#974038).

  - CVE-2016-3159: The fpu_fxrstor function in     arch/x86/i387.c did not properly handle writes to the     hardware FSW.ES bit when running on AMD64 processors,     which allowed local guest OS users to obtain sensitive     register content information from another guest by     leveraging pending exception and mask bits (bsc#973188).

  - CVE-2016-3158: The xrstor function did not properly     handle writes to the hardware FSW.ES bit when running on     AMD64 processors, which allowed local guest OS users to     obtain sensitive register content information from     another guest by leveraging pending exception and mask     bits (bsc#973188).

  - CVE-2016-4037: The ehci_advance_state function in     hw/usb/hcd-ehci.c allowed local guest OS administrators     to cause a denial of service (infinite loop and CPU     consumption) via a circular split isochronous transfer     descriptor (siTD) list (bsc#976111).

  - CVE-2016-4020: The patch_instruction function did not     initialize the imm32 variable, which allowed local guest     OS administrators to obtain sensitive information from     host stack memory by accessing the Task Priority     Register (TPR) (bsc#975907).

  - CVE-2016-4001: Buffer overflow in the     stellaris_enet_receive function, when the Stellaris     ethernet controller is configured to accept large     packets, allowed remote attackers to cause a denial of     service (QEMU crash) via a large packet (bsc#975130).

  - CVE-2016-4002: Buffer overflow in the mipsnet_receive     function, when the guest NIC is configured to accept     large packets, allowed remote attackers to cause a     denial of service (memory corruption and QEMU crash) or     possibly execute arbitrary code via a packet larger than     1514 bytes (bsc#975138).

  - bsc#978295: x86 software guest page walk PS bit handling     flaw (XSA-176)

  - CVE-2016-5403: virtio: unbounded memory allocation on     host via guest leading to DoS (XSA-184) (bsc#990923)

  - CVE-2016-6351: scsi: esp: OOB write access in esp_do_dma     (bsc#990843)

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Li Qiang discovered that QEMU incorrectly handled 53C9X Fast SCSI controller emulation. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code on the host. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. This issue only applied to Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-4439, CVE-2016-4441, CVE-2016-5238, CVE-2016-5338, CVE-2016-6351)

Li Qiang and Qinghao Tang discovered that QEMU incorrectly handled the VMware VGA module. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly to obtain sensitive host memory. (CVE-2016-4453, CVE-2016-4454)

Li Qiang discovered that QEMU incorrectly handled VMWARE PVSCSI paravirtual SCSI bus emulation support. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only applied to Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-4952)

Li Qiang discovered that QEMU incorrectly handled MegaRAID SAS 8708EM2 Host Bus Adapter emulation support. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly to obtain sensitive host memory. This issue only applied to Ubuntu 14.04 LTS and Ubuntu 16.04 LTS.
(CVE-2016-5105, CVE-2016-5106, CVE-2016-5107, CVE-2016-5337)

It was discovered that QEMU incorrectly handled certain iSCSI asynchronous I/O ioctl calls. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code on the host. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. This issue only applied to Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-5126)

Zhenhao Hong discovered that QEMU incorrectly handled the Virtio module. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2016-5403).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the qemu-kvm packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - Race condition in QEMU in Xen allows local x86 HVM     guest OS administrators to gain privileges by changing     certain data on shared rings, aka a 'double fetch'     vulnerability.(CVE-2016-9381)

  - The ohci_bus_start function in the USB OHCI emulation     support (hw/usb/hcd-ohci.c) in QEMU allows local guest     OS administrators to cause a denial of service (NULL     pointer dereference and QEMU process crash) via vectors     related to multiple eof_timers.(CVE-2016-2391)

  - qemu_deliver_packet_iov in net/net.c in Qemu accepts     packet sizes greater than INT_MAX, which allows     attackers to cause a denial of service or possibly have     unspecified other impact.(CVE-2018-17963)

  - Memory leak in the serial_exit_core function in     hw/char/serial.c in QEMU (aka Quick Emulator) allows     local guest OS privileged users to cause a denial of     service (host memory consumption and QEMU process     crash) via a large number of device unplug     operations.(CVE-2017-5579)

  - Memory leak in QEMU (aka Quick Emulator), when built     with IDE AHCI Emulation support, allows local guest OS     privileged users to cause a denial of service (memory     consumption) by repeatedly hot-unplugging the AHCI     device.(CVE-2017-9373)

  - Microarchitectural Store Buffer Data Sampling (MSBDS):
    Store buffers on some microprocessors utilizing     speculative execution may allow an authenticated user     to potentially enable information disclosure via a side     channel with local access. A list of impacted products     can be found here:
    https://www.intel.com/content/dam/www/public/us/en/docu     ments/corporate-information/SA00233-microcode-update-gu     idance_05132019.pdf(CVE-2018-12126)

  - Microarchitectural Data Sampling Uncacheable Memory     (MDSUM): Uncacheable memory on some microprocessors     utilizing speculative execution may allow an     authenticated user to potentially enable information     disclosure via a side channel with local access. A list     of impacted products can be found here:
    https://www.intel.com/content/dam/www/public/us/en/docu     ments/corporate-information/SA00233-microcode-update-gu     idance_05132019.pdf(CVE-2019-11091)

  - Microarchitectural Fill Buffer Data Sampling (MFBDS):
    Fill buffers on some microprocessors utilizing     speculative execution may allow an authenticated user     to potentially enable information disclosure via a side     channel with local access. A list of impacted products     can be found here:
    https://www.intel.com/content/dam/www/public/us/en/docu     ments/corporate-information/SA00233-microcode-update-gu     idance_05132019.pdf(CVE-2018-12130)

  - Microarchitectural Load Port Data Sampling (MLPDS):
    Load ports on some microprocessors utilizing     speculative execution may allow an authenticated user     to potentially enable information disclosure via a side     channel with local access. A list of impacted products     can be found here:
    https://www.intel.com/content/dam/www/public/us/en/docu     ments/corporate-information/SA00233-microcode-update-gu     idance_05132019.pdf(CVE-2018-12127)

  - Directory traversal vulnerability in hw/9pfs/9p.c in     QEMU (aka Quick Emulator) allows local guest OS     administrators to access host files outside the export     path via a .. (dot dot) in an unspecified     string.(CVE-2016-7116)

  - QEMU, when built with the Pseudo Random Number     Generator (PRNG) back-end support, allows local guest     OS users to cause a denial of service (process crash)     via an entropy request, which triggers arbitrary stack     based allocation and memory corruption.(CVE-2016-2858)

  - hw/ide/core.c in QEMU does not properly restrict the     commands accepted by an ATAPI device, which allows     guest users to cause a denial of service or possibly     have unspecified other impact via certain IDE commands,     as demonstrated by a WIN_READ_NATIVE_MAX command to an     empty drive, which triggers a divide-by-zero error and     instance crash.(CVE-2015-6855)

  - The slirp_smb function in net/slirp.c in QEMU 2.3.0 and     earlier creates temporary files with predictable names,     which allows local users to cause a denial of service     (instantiation failure) by creating /tmp/qemu-smb.*-*     files before the program.(CVE-2015-4037)

  - The MSI-X MMIO support in hw/pci/msix.c in QEMU (aka     Quick Emulator) allows local guest OS privileged users     to cause a denial of service (NULL pointer dereference     and QEMU process crash) by leveraging failure to define     the .write method.(CVE-2015-7549)

  - The ne2000_receive function in the NE2000 NIC emulation     support (hw/net/ne2000.c) in QEMU before 2.5.1 allows     local guest OS administrators to cause a denial of     service (infinite loop and QEMU process crash) via     crafted values for the PSTART and PSTOP registers,     involving ring buffer control.(CVE-2016-2841)

  - The mcf_fec_do_tx function in hw/net/mcf_fec.c in QEMU     (aka Quick Emulator) does not properly limit the buffer     descriptor count when transmitting packets, which     allows local guest OS administrators to cause a denial     of service (infinite loop and QEMU process crash) via     vectors involving a buffer descriptor with a length of     0 and crafted values in bd.flags.(CVE-2016-7908)

  - Integer overflow in the macro ROUND_UP (n, d) in Quick     Emulator (Qemu) allows a user to cause a denial of     service (Qemu process crash).(CVE-2017-18043)

  - The xhci_kick_epctx function in hw/usb/hcd-xhci.c in     QEMU (aka Quick Emulator) allows local guest OS     privileged users to cause a denial of service (infinite     loop and QEMU process crash) via vectors related to     control transfer descriptor sequence.(CVE-2017-5973)

  - Memory leak in QEMU (aka Quick Emulator), when built     with USB EHCI Emulation support, allows local guest OS     privileged users to cause a denial of service (memory     consumption) by repeatedly hot-unplugging the     device.(CVE-2017-9374)

  - Use-after-free vulnerability in hw/ide/ahci.c in QEMU,     when built with IDE AHCI Emulation support, allows     guest OS users to cause a denial of service (instance     crash) or possibly execute arbitrary code via an     invalid AHCI Native Command Queuing (NCQ) AIO     command.(CVE-2016-1568)

  - Buffer overflow in the stellaris_enet_receive function     in hw/net/stellaris_enet.c in QEMU, when the Stellaris     ethernet controller is configured to accept large     packets, allows remote attackers to cause a denial of     service (QEMU crash) via a large packet.(CVE-2016-4001)

  - Buffer overflow in the mipsnet_receive function in     hw/net/mipsnet.c in QEMU, when the guest NIC is     configured to accept large packets, allows remote     attackers to cause a denial of service (memory     corruption and QEMU crash) or possibly execute     arbitrary code via a packet larger than 1514     bytes.(CVE-2016-4002)

  - The pvscsi_ring_pop_req_descr function in     hw/scsi/vmw_pvscsi.c in QEMU (aka Quick Emulator)     allows local guest OS administrators to cause a denial     of service (infinite loop and QEMU process crash) by     leveraging failure to limit process IO loop to the ring     size.(CVE-2016-7421)

  - Quick Emulator (Qemu) built with the USB redirector     usb-guest support is vulnerable to a memory leakage     flaw. It could occur while destroying the USB     redirector in 'usbredir_handle_destroy'. A guest     user/process could use this issue to leak host memory,     resulting in DoS for a host.(CVE-2016-9907)

  - qemu-seccomp.c in QEMU might allow local OS guest users     to cause a denial of service (guest crash) by     leveraging mishandling of the seccomp policy for     threads other than the main thread.(CVE-2018-15746)

  - Stack-based buffer overflow in hw/usb/redirect.c in     QEMU (aka Quick Emulator) allows local guest OS users     to cause a denial of service (QEMU process crash) via     vectors related to logging debug     messages.(CVE-2017-10806)

  - The dhcp_decode function in slirp/bootp.c in QEMU (aka     Quick Emulator) allows local guest OS users to cause a     denial of service (out-of-bounds read and QEMU process     crash) via a crafted DHCP options     string.(CVE-2017-11434)

  - Memory leak in the audio/audio.c in QEMU (aka Quick     Emulator) allows remote attackers to cause a denial of     service (memory consumption) by repeatedly starting and     stopping audio capture.(CVE-2017-8309)

  - Qemu emulator <= 3.0.0 built with the NE2000 NIC     emulation support is vulnerable to an integer overflow,     which could lead to buffer overflow issue. It could     occur when receiving packets over the network. A user     inside guest could use this flaw to crash the Qemu     process resulting in DoS.(CVE-2018-10839)

  - Qemu has a Buffer Overflow in rtl8139_do_receive in     hw/net/rtl8139.c because an incorrect integer data type     is used.(CVE-2018-17958)

  - In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a     heap-based buffer overflow.(CVE-2019-6778)

  - The vmxnet_tx_pkt_parse_headers function in     hw/net/vmxnet_tx_pkt.c in QEMU (aka Quick Emulator)     allows local guest OS administrators to cause a denial     of service (buffer over-read) by leveraging failure to     check IP header length.(CVE-2016-6835)

  - Memory leak in the v9fs_xattrcreate function in     hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local     guest OS administrators to cause a denial of service     (memory consumption and QEMU process crash) via a large     number of Txattrcreate messages with the same fid     number.(CVE-2016-9102)

  - The v9fs_xattrcreate function in hw/9pfs/9p.c in QEMU     (aka Quick Emulator) allows local guest OS     administrators to obtain sensitive host heap memory     information by reading xattribute values before writing     to them.(CVE-2016-9103)

  - Multiple integer overflows in the (1) v9fs_xattr_read     and (2) v9fs_xattr_write functions in hw/9pfs/9p.c in     QEMU (aka Quick Emulator) allow local guest OS     administrators to cause a denial of service (QEMU     process crash) via a crafted offset, which triggers an     out-of-bounds access.(CVE-2016-9104)

  - Memory leak in the v9fs_link function in hw/9pfs/9p.c     in QEMU (aka Quick Emulator) allows local guest OS     administrators to cause a denial of service (memory     consumption) via vectors involving a reference to the     source fid object.(CVE-2016-9105)

  - Memory leak in the v9fs_write function in hw/9pfs/9p.c     in QEMU (aka Quick Emulator) allows local guest OS     administrators to cause a denial of service (memory     consumption) by leveraging failure to free an IO     vector.(CVE-2016-9106)

  - Quick Emulator (Qemu) built with the USB EHCI Emulation     support is vulnerable to a memory leakage issue. It     could occur while processing packet data in     'ehci_init_transfer'. A guest user/process could use     this issue to leak host memory, resulting in DoS for a     host.(CVE-2016-9911)

  - The net_tx_pkt_do_sw_fragmentation function in     hw/net/net_tx_pkt.c in QEMU (aka Quick Emulator) allows     local guest OS administrators to cause a denial of     service (infinite loop and QEMU process crash) via a     zero length for the current fragment     length.(CVE-2016-6834)

  - The vmxnet3_complete_packet function in     hw/net/vmxnet3.c in QEMU (aka Quick Emulator) allows     local guest OS administrators to obtain sensitive host     memory information by leveraging failure to initialize     the txcq_descr object.(CVE-2016-6836)

  - Integer overflow in the net_tx_pkt_init function in     hw/net/net_tx_pkt.c in QEMU (aka Quick Emulator) allows     local guest OS administrators to cause a denial of     service (QEMU process crash) via the maximum     fragmentation count, which triggers an unchecked     multiplication and NULL pointer     dereference.(CVE-2016-6888)

  - The pcnet_rdra_addr function in hw/net/pcnet.c in QEMU     (aka Quick Emulator) allows local guest OS     administrators to cause a denial of service (infinite     loop and QEMU process crash) by setting the (1) receive     or (2) transmit descriptor ring length to     0.(CVE-2016-7909)

  - The xhci_ring_fetch function in hw/usb/hcd-xhci.c in     QEMU (aka Quick Emulator) allows local guest OS     administrators to cause a denial of service (infinite     loop and QEMU process crash) by leveraging failure to     limit the number of link Transfer Request Blocks (TRB)     to process.(CVE-2016-8576)

  - The serial_update_parameters function in     hw/char/serial.c in QEMU (aka Quick Emulator) allows     local guest OS administrators to cause a denial of     service (divide-by-zero error and QEMU process crash)     via vectors involving a value of divider greater than     baud base.(CVE-2016-8669)

  - The intel_hda_xfer function in hw/audio/intel-hda.c in     QEMU (aka Quick Emulator) allows local guest OS     administrators to cause a denial of service (infinite     loop and CPU consumption) via an entry with the same     value for buffer length and pointer     position.(CVE-2016-8909)

  - The rtl8139_cplus_transmit function in hw/net/rtl8139.c     in QEMU (aka Quick Emulator) allows local guest OS     administrators to cause a denial of service (infinite     loop and CPU consumption) by leveraging failure to     limit the ring descriptor count.(CVE-2016-8910)

  - Stack-based buffer overflow in the     megasas_ctrl_get_info function in QEMU, when built with     SCSI MegaRAID SAS HBA emulation support, allows local     guest users to cause a denial of service (QEMU instance     crash) via a crafted SCSI controller CTRL_GET_INFO     command.(CVE-2015-8613)

  - QEMU (aka Quick Emulator) built with the USB EHCI     emulation support is vulnerable to a null pointer     dereference flaw. It could occur when an application     attempts to write to EHCI capabilities registers. A     privileged user inside quest could use this flaw to     crash the QEMU process instance resulting in     DoS.(CVE-2016-2198)

  - The is_rndis function in the USB Net device emulator     (hw/usb/dev-network.c) in QEMU before 2.5.1 does not     properly validate USB configuration descriptor objects,     which allows local guest OS administrators to cause a     denial of service (NULL pointer dereference and QEMU     process crash) via vectors involving a remote NDIS     control message packet.(CVE-2016-2392)

  - The ehci_advance_state function in hw/usb/hcd-ehci.c in     QEMU allows local guest OS administrators to cause a     denial of service (infinite loop and CPU consumption)     via a circular split isochronous transfer descriptor     (siTD) list, a related issue to     CVE-2015-8558.(CVE-2016-4037)

  - The vmsvga_fifo_run function in hw/display/vmware_vga.c     in QEMU allows local guest OS administrators to cause a     denial of service (infinite loop and QEMU process     crash) via a VGA command.(CVE-2016-4453)

  - The vmsvga_fifo_read_raw function in     hw/display/vmware_vga.c in QEMU allows local guest OS     administrators to obtain sensitive host memory     information or cause a denial of service (QEMU process     crash) by changing FIFO registers and issuing a VGA     command, which triggers an out-of-bounds     read.(CVE-2016-4454)

  - hw/virtio/virtio.c in the Virtual Network Device     (virtio-net) support in QEMU, when big or mergeable     receive buffers are not supported, allows remote     attackers to cause a denial of service (guest network     consumption) via a flood of jumbo frames on the (1)     tuntap or (2) macvtap interface.(CVE-2015-7295)

  - The eepro100 emulator in QEMU qemu-kvm blank allows     local guest users to cause a denial of service     (application crash and infinite loop) via vectors     involving the command block list.(CVE-2015-8345)

  - Qemu, when built with VNC display driver support,     allows remote attackers to cause a denial of service     (arithmetic exception and application crash) via     crafted SetPixelFormat messages from a     client.(CVE-2015-8504)

  - The ehci_process_itd function in hw/usb/hcd-ehci.c in     QEMU allows local guest OS administrators to cause a     denial of service (infinite loop and CPU consumption)     via a circular isochronous transfer descriptor (iTD)     list.(CVE-2015-8558)

  - Memory leak in net/vmxnet3.c in QEMU allows remote     attackers to cause a denial of service (memory     consumption).(CVE-2015-8567)

  - Memory leak in QEMU, when built with a VMWARE VMXNET3     paravirtual NIC emulator support, allows local guest     users to cause a denial of service (host memory     consumption) by trying to activate the vmxnet3 device     repeatedly.(CVE-2015-8568)

  - Buffer overflow in the pxa2xx_ssp_load function in     hw/arm/pxa2xx.c in QEMU before 1.7.2 allows remote     attackers to cause a denial of service or possibly     execute arbitrary code via a crafted s->rx_level value     in a savevm image.(CVE-2013-4533)

  - hw/net/vmxnet3.c in QEMU 2.0.0-rc0, 1.7.1, and earlier     allows local guest users to cause a denial of service     or possibly execute arbitrary code via vectors related     to (1) RX or (2) TX queue numbers or (3) interrupt     indices. NOTE: some of these details are obtained from     third party information.(CVE-2013-4544)

  - Multiple integer overflows in the USB Net device     emulator (hw/usb/dev-network.c) in QEMU before 2.5.1     allow local guest OS administrators to cause a denial     of service (QEMU process crash) or obtain sensitive     host memory information via a remote NDIS control     message packet that is mishandled in the (1)     rndis_query_response, (2) rndis_set_response, or (3)     usb_net_handle_dataout function.(CVE-2016-2538)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - Qemu: net: buffer overflow in MIPSnet emulator (CVE-2016-4002)

  - Integer overflow in the VNC display driver in QEMU before 2.1.0 allows attachers to cause a denial of     service (process crash) via a CLIENT_CUT_TEXT message, which triggers an infinite loop. (CVE-2015-5239)

  - The ne2000_receive function in hw/net/ne2000.c in QEMU before 2.4.0.1 allows attackers to cause a denial     of service (infinite loop and instance crash) or possibly execute arbitrary code via vectors related to     receiving packets. (CVE-2015-5278)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

- CVE-2016-4002: net: buffer overflow in MIPSnet (bz     #1326083)

  - CVE-2016-4952 scsi: pvscsi: out-of-bounds access issue

  - CVE-2016-4964: scsi: mptsas infinite loop (bz #1339157)

  - CVE-2016-5106: scsi: megasas: out-of-bounds write (bz     #1339581)

  - CVE-2016-5105: scsi: megasas: stack information leakage     (bz #1339585)

  - CVE-2016-5107: scsi: megasas: out-of-bounds read (bz     #1339573)

  - CVE-2016-4454: display: vmsvga: out-of-bounds read (bz     #1340740)

  - CVE-2016-4453: display: vmsvga: infinite loop (bz     #1340744)

  - CVE-2016-5126: block: iscsi: buffer overflow (bz     #1340925)

  - CVE-2016-5238: scsi: esp: OOB write (bz #1341932)

  - CVE-2016-5338: scsi: esp: OOB r/w access (bz #1343325)

  - CVE-2016-5337: scsi: megasas: information leakage (bz     #1343910)

  - Fix crash with -nodefaults -sdl (bz #1340931)

  - Add deps on edk2-ovmf and edk2-aarch64

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

qemu was updated to fix 19 security issues.

These security issues were fixed :

  - CVE-2016-2392: The is_rndis function in the USB Net     device emulator (hw/usb/dev-network.c) in QEMU did not     properly validate USB configuration descriptor objects,     which allowed local guest OS administrators to cause a     denial of service (NULL pointer dereference and QEMU     process crash) via vectors involving a remote NDIS     control message packet (bsc#967012)

  - CVE-2016-2391: The ohci_bus_start function in the USB     OHCI emulation support (hw/usb/hcd-ohci.c) in QEMU     allowed local guest OS administrators to cause a denial     of service (NULL pointer dereference and QEMU process     crash) via vectors related to multiple eof_timers     (bsc#967013)

  - CVE-2016-5106: The megasas_dcmd_set_properties function     in hw/scsi/megasas.c in QEMU, when built with MegaRAID     SAS 8708EM2 Host Bus Adapter emulation support, allowed     local guest administrators to cause a denial of service     (out-of-bounds write access) via vectors involving a     MegaRAID Firmware Interface (MFI) command (bsc#982018)

  - CVE-2016-5105: The megasas_dcmd_cfg_read function in     hw/scsi/megasas.c in QEMU, when built with MegaRAID SAS     8708EM2 Host Bus Adapter emulation support, used an     uninitialized variable, which allowed local guest     administrators to read host memory via vectors involving     a MegaRAID Firmware Interface (MFI) command (bsc#982017)

  - CVE-2016-5107: The megasas_lookup_frame function in     QEMU, when built with MegaRAID SAS 8708EM2 Host Bus     Adapter emulation support, allowed local guest OS     administrators to cause a denial of service     (out-of-bounds read and crash) via unspecified vectors     (bsc#982019)

  - CVE-2016-5126: Heap-based buffer overflow in the     iscsi_aio_ioctl function in block/iscsi.c in QEMU     allowed local guest OS users to cause a denial of     service (QEMU process crash) or possibly execute     arbitrary code via a crafted iSCSI asynchronous I/O     ioctl call (bsc#982285)

  - CVE-2016-4454: The vmsvga_fifo_read_raw function in     hw/display/vmware_vga.c in QEMU allowed local guest OS     administrators to obtain sensitive host memory     information or cause a denial of service (QEMU process     crash) by changing FIFO registers and issuing a VGA     command, which triggers an out-of-bounds read     (bsc#982222)

  - CVE-2016-4453: The vmsvga_fifo_run function in     hw/display/vmware_vga.c in QEMU allowed local guest OS     administrators to cause a denial of service (infinite     loop and QEMU process crash) via a VGA command     (bsc#982223)

  - CVE-2016-5338: The (1) esp_reg_read and (2)     esp_reg_write functions in hw/scsi/esp.c in QEMU allowed     local guest OS administrators to cause a denial of     service (QEMU process crash) or execute arbitrary code     on the QEMU host via vectors related to the information     transfer buffer (bsc#983982)

  - CVE-2016-5337: The megasas_ctrl_get_info function in     hw/scsi/megasas.c in QEMU allowed local guest OS     administrators to obtain sensitive host memory     information via vectors related to reading device     control information (bsc#983961)

  - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c in     QEMU allowed local guest OS administrators to cause a     denial of service (out-of-bounds write and QEMU process     crash) via vectors related to reading from the     information transfer buffer in non-DMA mode (bsc#982959)

  - CVE-2016-5403: The virtqueue_pop function in     hw/virtio/virtio.c in QEMU allowed local guest OS     administrators to cause a denial of service (memory     consumption and QEMU process crash) by submitting     requests without waiting for completion (bsc#991080)

  - CVE-2016-6490: Infinite loop in the virtio framework. A     privileged user inside the guest could have used this     flaw to crash the Qemu instance on the host resulting in     DoS (bsc#991466)

  - CVE-2016-6888: Integer overflow in packet initialisation     in VMXNET3 device driver. A privileged user inside guest     could have used this flaw to crash the Qemu instance     resulting in DoS (bsc#994771)

  - CVE-2016-6833: Use-after-free issue in the VMWARE     VMXNET3 NIC device support. A privileged user inside     guest could have used this issue to crash the Qemu     instance resulting in DoS (bsc#994774)

  - CVE-2016-7116: Host directory sharing via Plan 9 File     System(9pfs) was vulnerable to a directory/path     traversal issue. A privileged user inside guest could     have used this flaw to access undue files on the host     (bsc#996441)

  - CVE-2016-6836: VMWARE VMXNET3 NIC device support was     leaging information leakage. A privileged user inside     guest could have used this to leak host memory bytes to     a guest (bsc#994760)

  - CVE-2016-7155: In the VMWARE PVSCSI paravirtual SCSI bus     a OOB access and/or infinite loop issue could have     allowed a privileged user inside guest to crash the Qemu     process resulting in DoS (bsc#997858)

  - CVE-2016-7156: In the VMWARE PVSCSI paravirtual SCSI bus     a infinite loop issue could have allowed a privileged     user inside guest to crash the Qemu process resulting in     DoS (bsc#997859)

This non-security issue was fixed :

  - bsc#1000048: Fix migration failure where target host is     a soon to be released SLES 12 SP2. Qemu's spice code     gets an assertion.

This update was imported from the SUSE:SLE-12-SP1:Update update project.

qemu was updated to fix 21 security issues. These security issues were fixed :

  - CVE-2014-5388: Off-by-one error in the pci_read function     in the ACPI PCI hotplug interface (hw/acpi/pcihp.c) in     QEMU allowed local guest users to obtain sensitive     information and have other unspecified impact related to     a crafted PCI device that triggers memory corruption     (bsc#893323).

  - CVE-2015-6815: e1000 NIC emulation support was     vulnerable to an infinite loop issue. A privileged user     inside guest could have used this flaw to crash the Qemu     instance resulting in DoS. (bsc#944697).

  - CVE-2016-2391: The ohci_bus_start function in the USB     OHCI emulation support (hw/usb/hcd-ohci.c) in QEMU     allowed local guest OS administrators to cause a denial     of service (NULL pointer dereference and QEMU process     crash) via vectors related to multiple eof_timers     (bsc#967013).

  - CVE-2016-2392: The is_rndis function in the USB Net     device emulator (hw/usb/dev-network.c) in QEMU did not     properly validate USB configuration descriptor objects,     which allowed local guest OS administrators to cause a     denial of service (NULL pointer dereference and QEMU     process crash) via vectors involving a remote NDIS     control message packet (bsc#967012).

  - CVE-2016-4453: The vmsvga_fifo_run function in     hw/display/vmware_vga.c in QEMU allowed local guest OS     administrators to cause a denial of service (infinite     loop and QEMU process crash) via a VGA command     (bsc#982223).

  - CVE-2016-4454: The vmsvga_fifo_read_raw function in     hw/display/vmware_vga.c in QEMU allowed local guest OS     administrators to obtain sensitive host memory     information or cause a denial of service (QEMU process     crash) by changing FIFO registers and issuing a VGA     command, which triggers an out-of-bounds read     (bsc#982222).

  - CVE-2016-5105: The megasas_dcmd_cfg_read function in     hw/scsi/megasas.c in QEMU, when built with MegaRAID SAS     8708EM2 Host Bus Adapter emulation support, used an     uninitialized variable, which allowed local guest     administrators to read host memory via vectors involving     a MegaRAID Firmware Interface (MFI) command     (bsc#982017).

  - CVE-2016-5106: The megasas_dcmd_set_properties function     in hw/scsi/megasas.c in QEMU, when built with MegaRAID     SAS 8708EM2 Host Bus Adapter emulation support, allowed     local guest administrators to cause a denial of service     (out-of-bounds write access) via vectors involving a     MegaRAID Firmware Interface (MFI) command (bsc#982018).

  - CVE-2016-5107: The megasas_lookup_frame function in     QEMU, when built with MegaRAID SAS 8708EM2 Host Bus     Adapter emulation support, allowed local guest OS     administrators to cause a denial of service     (out-of-bounds read and crash) via unspecified vectors     (bsc#982019).

  - CVE-2016-5126: Heap-based buffer overflow in the     iscsi_aio_ioctl function in block/iscsi.c in QEMU     allowed local guest OS users to cause a denial of     service (QEMU process crash) or possibly execute     arbitrary code via a crafted iSCSI asynchronous I/O     ioctl call (bsc#982285).

  - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c in     QEMU allowed local guest OS administrators to cause a     denial of service (out-of-bounds write and QEMU process     crash) via vectors related to reading from the     information transfer buffer in non-DMA mode     (bsc#982959).

  - CVE-2016-5337: The megasas_ctrl_get_info function in     hw/scsi/megasas.c in QEMU allowed local guest OS     administrators to obtain sensitive host memory     information via vectors related to reading device     control information (bsc#983961).

  - CVE-2016-5338: The (1) esp_reg_read and (2)     esp_reg_write functions in hw/scsi/esp.c in QEMU allowed     local guest OS administrators to cause a denial of     service (QEMU process crash) or execute arbitrary code     on the QEMU host via vectors related to the information     transfer buffer (bsc#983982).

  - CVE-2016-5403: The virtqueue_pop function in     hw/virtio/virtio.c in QEMU allowed local guest OS     administrators to cause a denial of service (memory     consumption and QEMU process crash) by submitting     requests without waiting for completion (bsc#991080).

  - CVE-2016-6490: Infinite loop in the virtio framework. A     privileged user inside the guest could have used this     flaw to crash the Qemu instance on the host resulting in     DoS (bsc#991466).

  - CVE-2016-6833: Use-after-free issue in the VMWARE     VMXNET3 NIC device support. A privileged user inside     guest could have used this issue to crash the Qemu     instance resulting in DoS (bsc#994774).

  - CVE-2016-6836: VMWARE VMXNET3 NIC device support was     leaging information leakage. A privileged user inside     guest could have used this to leak host memory bytes to     a guest (bsc#994760).

  - CVE-2016-6888: Integer overflow in packet initialisation     in VMXNET3 device driver. A privileged user inside guest     could have used this flaw to crash the Qemu instance     resulting in DoS (bsc#994771).

  - CVE-2016-7116: Host directory sharing via Plan 9 File     System(9pfs) was vulnerable to a directory/path     traversal issue. A privileged user inside guest could     have used this flaw to access undue files on the host     (bsc#996441).

  - CVE-2016-7155: In the VMWARE PVSCSI paravirtual SCSI bus     a OOB access and/or infinite loop issue could have     allowed a privileged user inside guest to crash the Qemu     process resulting in DoS (bsc#997858).

  - CVE-2016-7156: In the VMWARE PVSCSI paravirtual SCSI bus     a infinite loop issue could have allowed a privileged     user inside guest to crash the Qemu process resulting in     DoS (bsc#997859).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

此 xen 4.5.3 版的更新可修正數個問題。已修正這些安全性問題：

- CVE-2016-6258：PV 來賓中潛在的權限提升問題 (XSA-182) (bsc#988675)。

- CVE-2016-6259：32 位元例外狀況/事件遞送白名單中遺漏 SMAP (XSA-183) (bsc#988676)。

- CVE-2016-5337：megasas_ctrl_get_info 函式允許本機來賓作業系統管理員透過與讀取裝置控制資訊相關的向量，取得敏感主機記憶體資訊 (bsc#983973)。

- CVE-2016-5338：(1) esp_reg_read 與 (2) esp_reg_write 函式允許本機來賓作業系統管理員透過與資訊傳輸緩衝區相關的向量，造成拒絕服務 (QEMU 處理程序損毀) 或在主機上執行任意程式碼 (bsc#983984)。

- CVE-2016-5238：hw/scsi/esp.c 中的 get_cmd 函式允許本機來賓作業系統管理員透過與在非 DMA 模式下從資訊傳輸緩衝區讀取相關的向量，造成拒絕服務 (超出邊界寫入與 QEMU 處理程序損毀) (bsc#982960)。

- CVE-2016-4453：vmsvga_fifo_run 函式允許本機來賓作業系統管理員透過 VGA 命令造成拒絕服務 (無限迴圈與 QEMU 處理程序損毀) (bsc#982225)。

- CVE-2016-4454：vmsvga_fifo_read_raw 函式允許本機來賓作業系統管理員變更 FIFO 暫存器並發出 VGA 命令，觸發超出邊界讀取，從而取得敏感主機記憶體資訊或造成拒絕服務 (QEMU 處理程序損毀) (bsc#982224)。

- CVE-2016-5126：iscsi_aio_ioctl 函式中的一個堆積型緩衝區溢位問題允許本機來賓作業系統使用者透過特製 iSCSI 非同步 I/O ioctl 呼叫，造成拒絕服務 (QEMU 處理程序損毀) 或可能執行任意程式碼 (bsc#982286)。

- CVE-2016-5105：讀取組態時的堆疊資訊洩漏問題 (bsc#982024)。

- CVE-2016-5106：設定控制器內容時的超出邊界寫入問題 (bsc#982025)。

- CVE-2016-5107：megasas_lookup_frame() 函式中的超出邊界讀取錯誤 (bsc#982026)。

- CVE-2016-4963：libxl 裝置處理允許具有驅動程式網域存取權的本機來賓作業系統使用者，透過操控 xenstore 之後端目錄中的資訊，造成拒絕服務 (管理工具混淆) (bsc#979670)。

- CVE-2016-4962：libxl 裝置處理允許本機作業系統來賓系統管理員透過操控 xenstore 之來賓控制區域中的資訊，造成拒絕服務 (資源消耗或管理設備混淆) 或取得主機作業系統權限 (bsc#979620)。

- CVE-2016-4952：pvsci_ring_init_msg/data 常式中的超出邊界存取問題 (bsc#981276)。

- CVE-2014-3672：libvirt Xen 中的 qemu 實作允許本機來賓作業系統使用者透過寫入 stdout 或 stderr　造成拒絕服務 (主機磁碟消耗) (bsc#981264)。

- CVE-2016-4441：53C9X Fast SCSI Controller (FSC) 支援中的 get_cmd 函式未正確檢查 DMA 長度，其允許本機來賓作業系統管理員透過涉及 SCSI 命令的不明向量，造成拒絕服務 (超出邊界寫入與 QEMU 處理程序損毀) (bsc#980724)。

- CVE-2016-4439：53C9X Fast SCSI Controller (FSC) 支援中的 esp_reg_write 函式未正確檢查命令緩衝區長度，其允許本機來賓作業系統管理員透過不明向量，造成拒絕服務 (超出邊界寫入與 QEMU 處理程序損毀)，或可能在主機上執行任意程式碼 (bsc#980716)。

- CVE-2016-3710：VGA 模組未對視訊記憶體的堆積存取權正確執行邊界檢查，其允許本機來賓作業系統管理員透過在設定庫暫存器之後變更存取模式，在主機上執行任意程式碼，即「黑暗之門」問題 (bsc#978164)。

- CVE-2016-3960：x86 陰影頁面表格程式碼中的一個整數溢位問題允許本機來賓作業系統使用者透過遮蔽超級頁面對應，造成拒絕服務 (主機當機) 或可能取得權限 (bsc#974038)。

- CVE-2016-3159：在 AMD64 處理器中執行時，arch/x86/i387.c 中的 fpu_fxrstor 函式未正確處理寫入硬體 FSW.ES 位元的操作，其允許本機來賓作業系統使用者透過利用擱置例外狀況與遮罩位元，從其他來賓取得敏感暫存器內容資訊 (bsc#973188)。

- CVE-2016-3158：在 AMD64 處理器中執行時，xrstor 函式未正確處理寫入硬體 FSW.ES 位元的操作，其允許本機來賓作業系統使用者透過利用擱置例外狀況與遮罩位元，從其他來賓取得敏感暫存器內容資訊 (bsc#973188)。

- CVE-2016-4037：hw/usb/hcd-ehci.c 中的 ehci_advance_state 函式允許本機來賓作業系統管理員透過循環分割等時傳輸描述符號 (siTD) 清單，造成拒絕服務 (無限迴圈與 CPU 消耗) (bsc#976111)。

- CVE-2016-4020：patch_instruction 函式未初始化 imm32 變數，其允許本機來賓作業系統管理員透過存取 Task Priority Register (TPR)，從主機堆疊記憶體取得敏感資訊 (bsc#975907)。

- CVE-2016-4001：將 Stellaris 乙太網路控制器設定為接受大型封包時，stellaris_enet_receive 函式中的一個緩衝區溢位問題允許遠端攻擊者透過大型封包，造成拒絕服務 (QEMU 損毀) (bsc#975130)。

- CVE-2016-4002：將來賓 NIC 設定為接受大型封包時，mipsnet_receive 函式中的一個緩衝區溢位問題允許遠端攻擊者透過大於 1514 位元組的封包，造成拒絕服務 (記憶體損毀與 QEMU 損毀) 或可能執行任意程式碼 (bsc#975138)。

- bsc#978295：x86 軟體來賓頁面查詢 PS 位元處理瑕疵 (XSA-176)

- CVE-2016-5403：virtio：透過來賓在主機上無限制配置記憶體導致 DoS (XSA-184) (bsc#990923)

- CVE-2016-6351：scsi：esp：esp_do_dma 中的 OOB 寫入存取問題 (bsc#990843) 已修正下列非安全性問題：

- bsc#986586：「modprobe xenblk」(非 xen 核心) 開機期間發生的記憶體不足 (oom)

- bsc#900418：無法在 SLES12 XEN 上執行轉儲存

- bsc#953339：針對 PVonHVM 來賓中的模擬 PCI 裝置，將 SUSE 限定拔除通訊協定實作至 qemu-xen-upstream

- bsc#953362：針對 PVonHVM 來賓中的模擬 PCI 裝置，將 SUSE 限定拔除通訊協定實作至 qemu-xen-upstream

- bsc#953518：針對 PVonHVM 來賓中的模擬 PCI 裝置，將 SUSE 限定拔除通訊協定實作至 qemu-xen-upstream

- bsc#984981：針對 PVonHVM 來賓中的模擬 PCI 裝置，將 SUSE 限定拔除通訊協定實作至 qemu-xen-upstream

- bsc#954872：指令碼 block-dmmd 未如預期運作 - libxl：error：libxl_dm.c (其他修正)

- bsc#982695：qemu 無法從 xvda 開機 HVM 來賓

- bsc#958848：/usr/src/packages/BUILD/xen-4.4.2-testing/obj/default/ba lloon/balloon.c:407 的 HVM 來賓當機

- bsc#949889：無法在 SLES12SP1Beta3 XEN 底下安裝 32 位元 paravirt VM

- bsc#954872：指令碼 block-dmmd 未如預期運作 - libxl：error：libxl_dm.c (另一項修正)

- bsc#961600：使用大於目前記憶體的最大記憶體設定 Xen HVM domU 時效能不彰

- bsc#963161：升級至最新維護更新之後，將 VF 指派給 Windows VM 時，Windows VM 會在載入期間停滯

- bsc#976058：執行簡單 HVM 來賓時發生的 Xen 錯誤 (Post Alpha 2 xen+qemu)

- bsc#973631：AWS EC2 kdump 問題

- bsc#957986：間接描述符號與 Amazon 區塊後端不相容

- bsc#964427：捨棄裝置區塊：失敗 - 輸入/輸出錯誤

- bsc#985503：修正 vif-route

- bsc#978413：PV 來賓從 SLES11 SP4 升級至 SLES 12 SP2 alpha3 失敗

請注意，Tenable Network Security 已直接從 SUSE 安全性公告擷取前置描述區塊。Tenable 已盡量在不造成其他問題的前提下，嘗試自動清理並將其格式化。

- CVE-2016-4002：net：MIPSnet 中的緩衝區溢位 (bz #1326083)

- CVE-2016-4952 scsi：pvscsi：超出邊界存取問題

- CVE-2016-5106：scsi：megasas：超出邊界寫入 (bz #1339581)

- CVE-2016-5105：scsi：megasas：堆疊資訊洩漏 (bz #1339585)

- CVE-2016-5107：scsi：megasas：超出邊界讀取 (bz #1339573)

- CVE-2016-4454：display：vmsvga：超出邊界讀取 (bz #1340740)

- CVE-2016-4453：display：vmsvga：無限迴圈 (bz #1340744)

- CVE-2016-5238：scsi：esp：OOB 寫入 (bz #1341932)

- CVE-2016-5338：scsi：esp：OOB 讀取/寫入存取 (bz #1343325)

- CVE-2016-5337：scsi：megasas：資訊洩漏 (bz #1343910)

請注意，Tenable Network Security 已直接從 Fedora 更新系統網站擷取前置描述區塊。
Tenable 已盡量在不造成其他問題的前提下，嘗試自動清理並將其格式化。

Qemu：scsi：esp：處理 ESP_FIFO 時的 OOB 讀寫存取問題 [CVE-2016-5338] (#1343323) Qemu：scsi：megasas：megasas_ctrl_get_info 中的資訊洩漏問題 [CVE-2016-5337] (#1343909)

----

CVE-2016-2858 的修正未構建為啟用 qemu-xen libxl 裝置處理程式碼中未清理的來賓輸入 [XSA-175、CVE-2016-4962] (#1342132) libxl 裝置處理中未清理的驅動程式網域輸入 [XSA-178、CVE-2016-4963] (#1342131) arm：VMID 耗盡造成的主機當機 [XSA-181] (#1342530) Qemu：顯示：vmsvga：vmsvga_fifo_read_raw() 常式中的超出邊界讀取 [CVE-2016-4454] (#1340741) Qemu：
顯示：vmsvga：vmsvga_fifo_run() 常式中的無限迴圈 [CVE-2016-4453] (#1340746) Qemu：scsi：esp：在 get_cmd 中使用非 DMA 模式時的 OOB 寫入 [CVE-2016-5238] (#1341931)

請注意，Tenable Network Security 已直接從 Fedora 更新系統網站擷取前置描述區塊。
Tenable 已盡量在不造成其他問題的前提下，嘗試自動清理並將其格式化。

Li Qiang 發現 QEMU 未正確處理 53C9X Fast SCSI Controller 模擬。來賓內有權限的攻擊者可利用此問題造成 QEMU 損毀，進而導致拒絕服務或可能在主機上執行任意程式碼。在預設安裝中，搭配 libvirt 使用 QEMU 時，libvirt AppArmor 設定檔會隔離攻擊者。此問題僅適用 Ubuntu 14.04 LTS 和 Ubuntu 16.04 LTS。(CVE-2016-4439、CVE-2016-4441、CVE-2016-5238、CVE-2016-5338、CVE-2016-6351)

Li Qiang 和 Qinghao Tang 發現 QEMU 未正確處理 VMware VGA 模組。來賓內有權限的攻擊者可利用此問題造成 QEMU 損毀，進而導致拒絕服務或可能取得敏感的主機記憶體。(CVE-2016-4453、CVE-2016-4454)

Li Qiang 發現 QEMU 未正確處理 VMWARE PVSCSI 半虛擬化 SCSI 匯流排模擬支援。來賓內有權限的攻擊者可利用此問題造成 QEMU 損毀，進而導致拒絕服務。此問題僅適用 Ubuntu 14.04 LTS 和 Ubuntu 16.04 LTS。(CVE-2016-4952)

Li Qiang 發現 QEMU 未正確處理 MegaRAID SAS 8708EM2 主機匯流排介面卡模擬支援。來賓內有權限的攻擊者可利用此問題造成 QEMU 損毀，進而導致拒絕服務或可能取得敏感的主機記憶體。此問題僅適用 Ubuntu 14.04 LTS 和 Ubuntu 16.04 LTS。
(CVE-2016-5105, CVE-2016-5106, CVE-2016-5107, CVE-2016-5337)

據發現，QEMU 未正確處理特定 iSCSI 非同步 I/O ioctl 呼叫。客體內的攻擊者可利用此問題造成 QEMU 損毀，進而導致拒絕服務或可能在主機上執行任意程式碼。在預設安裝中，搭配 libvirt 使用 QEMU 時，libvirt AppArmor 設定檔會隔離攻擊者。此問題僅適用 Ubuntu 14.04 LTS 和 Ubuntu 16.04 LTS。(CVE-2016-5126)

Zhenhao Hong 發現 QEMU 未正確處理 Virtio 模組。來賓內有權限的攻擊者可利用此問題造成 QEMU 損毀，進而導致拒絕服務。(CVE-2016-5403)

請注意，Tenable Network Security 已直接從 Ubuntu 安全性公告擷取前述描述區塊。Tenable 已盡量在不造成其他問題的前提下，嘗試自動清理並將其格式化。

- CVE-2016-4002：net：MIPSnet 中的缓冲区溢出 (bz #1326083)

- CVE-2016-4952 scsi：pvscsi：越界访问问题

- CVE-2016-5106：scsi：megasas：越界写入 (bz #1339581)

- CVE-2016-5105：scsi：megasas：堆栈信息泄漏 (bz #1339585)

- CVE-2016-5107：scsi：megasas：越界读取 (bz #1339573)

- CVE-2016-4454：display：vmsvga：越界读取 (bz #1340740)

- CVE-2016-4453：display：vmsvga：无限循环 (bz #1340744)

- CVE-2016-5238：scsi：esp：越界写入 (bz #1341932)

- CVE-2016-5338：scsi：esp：越界读写访问 (bz #1343325)

- CVE-2016-5337：scsi：megasas：信息泄漏 (bz #1343910)

请注意，Tenable Network Security 已直接从 Fedora 更新系统网站提取上述描述块。
Tenable 已尝试在不引入其他问题的情况下尽可能进行了自动整理和排版。

Qemu：scsi：esp：处理 ESP_FIFO 时的 OOB 读写访问 [CVE-2016-5338] (#1343323) Qemu：scsi：megasas：megasas_ctrl_get_info 中的信息泄漏 [CVE-2016-5337] (#1343909)

----

CVE-2016-2858 的补丁在启用 qemu-xen 的情况下不进行构建 libxl 装置处理代码中未审查的客户机输入 [XSA-175、CVE-2016-4962] (#1342132) libxl 装置处理中未审查的驱动程序域输入 [XSA-178、CVE-2016-4963] (#1342131) arm：VMID 耗尽造成的主机崩溃 [XSA-181] (#1342530) Qemu：display：vmsvga：vmsvga_fifo_read_raw() 例程中的越界读取问题 [CVE-2016-4454] (#1340741) Qemu：
display：vmsvga：vmsvga_fifo_run() 例程中的无限循环问题 [CVE-2016-4453] (#1340746) Qemu：scsi：esp：在 get_cmd 中使用非 DMA 模式时的越界写入问题 [CVE-2016-5238] (#1341931)

请注意，Tenable Network Security 已直接从 Fedora 更新系统网站提取上述描述块。
Tenable 已尝试在不引入其他问题的情况下尽可能进行了自动整理和排版。

Li Qiang 发现 QEMU 未正确处理 53C9X Fast SCSI Controller 仿真。客户机中的特权攻击者可利用此问题造成 QEMU 崩溃，进而导致拒绝服务或可能在主机上执行任意代码。在默认安装下，当 QEMU 配合 libvirt 使用时，libvirt AppArmor 的配置文件可起到隔离攻击者的作用。此问题仅影响 Ubuntu 14.04 LTS 和 Ubuntu 16.04 LTS。（CVE-2016-4439、CVE-2016-4441、CVE-2016-5238、CVE-2016-5338、CVE-2016-6351）

Li Qiang 和 Qinghao Tang 发现 QEMU 未正确处理 VMware VGA 模块。客户机中的特权攻击者可利用此问题造成 QEMU 崩溃，进而导致拒绝服务或可能取得敏感的主机内存。（CVE-2016-4453、CVE-2016-4454）

Li Qiang 发现 QEMU 未能正确处理 VMWARE PVSCSI 半虚拟化 SCSI 总线仿真支持。客户机内的特权攻击者可利用此问题造成 QEMU 崩溃，进而导致拒绝服务。此问题仅影响 Ubuntu 14.04 LTS 和 Ubuntu 16.04 LTS。(CVE-2016-4952)

Li Qiang 发现 QEMU 未正确处理 MegaRAID SAS 8708EM2 主机总线适配器仿真支持。客户机中的特权攻击者可利用此问题造成 QEMU 崩溃，进而导致拒绝服务或可能取得敏感的主机内存。此问题仅影响 Ubuntu 14.04 LTS 和 Ubuntu 16.04 LTS。
（CVE-2016-5105、CVE-2016-5106、CVE-2016-5107、CVE-2016-5337）

已发现 QEMU 未正确处理某些 iSCSI 异步 I/O ioctl 调用。客户机中的攻击者可利用此问题造成 QEMU 崩溃，进而导致拒绝服务或可能在主机上执行任意代码。在默认安装下，当 QEMU 配合 libvirt 使用时，libvirt AppArmor 的配置文件可起到隔离攻击者的作用。此问题仅影响 Ubuntu 14.04 LTS 和 Ubuntu 16.04 LTS。(CVE-2016-5126)

Zhenhao Hong 发现 QEMU 未正确处理 Virtio 模块。客户机内的特权攻击者可利用此问题造成 QEMU 崩溃，进而导致拒绝服务。 (CVE-2016-5403)

请注意，Tenable Network Security 已直接从 Ubuntu 安全公告中提取上述描述块。Tenable 已尝试在不引入其他问题的情况下，尽可能进行自动清理和排版。

此 xen 版本 4.5.3 的更新修复了多个问题。修复了这些安全问题：

- CVE-2016-6258：PV 客户机中潜在的权限升级 (XSA-182) (bsc#988675)。

- CVE-2016-6259：32 位异常/事件传递缺少 SMAP 白名单 (XSA-183) (bsc#988676)。

- CVE-2016-5337：megasas_ctrl_get_info 函数允许本地客户机操作系统管理员通过与读取设备控制信息相关的矢量，取得敏感主机内存信息 (bsc#983973)。

- CVE-2016-5338：(1) esp_reg_read 与 (2) esp_reg_write 函数允许本地客户机操作系统管理员通过与信息传输缓冲区相关的矢量，造成拒绝服务（QEMU 进程崩溃）或在主机上执行任意代码 (bsc#983984)。

- CVE-2016-5238：hw/scsi/esp.c 中的 get_cmd 函数允许本地客户机操作系统管理员通过与在非 DMA 模式下从信息传输缓冲区读取相关的矢量，造成拒绝服务（越界写入与 QEMU 进程崩溃）(bsc#982960)。

- CVE-2016-4453：vmsvga_fifo_run 函数允许本地客户机操作系统管理员通过 VGA 命令造成拒绝服务（无限循环与 QEMU 进程崩溃）(bsc#982225)。

- CVE-2016-4454：vmsvga_fifo_read_raw 函数允许本地客户机操作系统管理员通过更改 FIFO 寄存器并发出可触发越界读取的 VGA 命令，取得敏感主机内存信息或造成拒绝服务（QEMU 进程崩溃）(bsc#982224)。

- CVE-2016-5126：iscsi_aio_ioctl 函数中基于堆的缓冲区溢出允许本地客户机操作系统用户通过特别构建的 iSCSI 异步 I/O ioctl 调用，造成拒绝服务（QEMU 进程崩溃）或可能执行任意代码 (bsc#982286)。

- CVE-2016-5105：读取配置时的堆栈信息泄漏 (bsc#982024)。

- CVE-2016-5106：设置控制器属性时的越界写入 (bsc#982025)。

- CVE-2016-5107：megasas_lookup_frame() 函数中的越界读取 (bsc#982026)。

- CVE-2016-4963：libxl 设备处理允许具有驱动程序域访问权限的本地客户机操作系统用户，通过操控 xenstore 的后端目录中的信息，造成拒绝服务（管理工具混淆）(bsc#979670)。

- CVE-2016-4962：libxl 设备处理允许本地操作系统客户机系统管理员通过操控 xenstore 的客户机控制区域中的信息，造成拒绝服务（资源消耗或管理设施混淆）或取得主机操作系统权限 (bsc#979620)。

- CVE-2016-4952：pvsci_ring_init_msg/data 例程中的越界访问问题 (bsc#981276)。

- CVE-2014-3672：libvirt Xen 中的 qemu 实现允许本地客户机操作系统用户通过写入 stdout 或 stderr　造成拒绝服务（主机磁盘消耗）(bsc#981264)。

- CVE-2016-4441：53C9X Fast SCSI Controller (FSC) 支持中的 get_cmd 函数未正确检查 DMA 长度，其允许本地客户机操作系统管理员通过涉及 SCSI 命令的不明矢量，造成拒绝服务（越界写入与 QEMU 进程崩溃）(bsc#980724)。

- CVE-2016-4439：53C9X Fast SCSI Controller (FSC) 支持中的 esp_reg_write 函数未正确检查命令缓冲区长度，其允许本地客户机操作系统管理员通过不明矢量，造成拒绝服务（越界写入与 QEMU 进程崩溃），或可能在主机上执行任意代码 (bsc#980716)。

- CVE-2016-3710：VGA 模块未对视频内存的堆积访问权限正确执行边界检查，其允许本地客户机操作系统管理员通过在设置库寄存器之后更改访问模式，在主机上执行任意代码，即“黑暗之门”问题 (bsc#978164)。

- CVE-2016-3960：x86 阴影页表代码中的整数溢出允许本地客户机操作系统用户通过遮蔽超级页面映射，造成拒绝服务（主机崩溃）或可能取得权限 (bsc#974038)。

- CVE-2016-3159：在 AMD64 处理器中运行时，arch/x86/i387.c 中的 fpu_fxrstor 函数未正确处理硬件 FSW.ES 位的写入，其允许本地客户机操作系统用户通过利用待定的异常与掩码位，从其他客户机取得敏感寄存器内容信息 (bsc#973188)。

- CVE-2016-3158：在 AMD64 处理器中运行时，xrstor 函数未正确处理硬件 FSW.ES 位的写入，其允许本地客户机操作系统用户通过利用待定的异常与掩码位，从其他客户机取得敏感寄存器内容信息 (bsc#973188)。

- CVE-2016-4037：hw/usb/hcd-ehci.c 中的 ehci_advance_state 函数允许本地客户机操作系统管理员通过循环拆分同步传输描述符 (siTD) 列表，造成拒绝服务（无限循环与 CPU 消耗）(bsc#976111)。

- CVE-2016-4020：patch_instruction 函数未初始化 imm32 变量，其允许本地客户机操作系统管理员通过访问 Task Priority Register (TPR)，从主机堆栈内存取得敏感信息 (bsc#975907)。

- CVE-2016-4001：将 Stellaris 以太网控制器配置为接受大型数据包时，stellaris_enet_receive 函数中的缓冲区溢出允许远程攻击者通过大型数据包，造成拒绝服务（QEMU 崩溃）(bsc#975130)。

- CVE-2016-4002：将客户机 NIC 配置为接受大型数据包时，mipsnet_receive 函数中的缓冲区溢出允许远程攻击者通过大于 1514 字节的数据包，造成拒绝服务（内存损坏与 QEMU 崩溃）或可能执行任意代码 (bsc#975138)。

- bsc#978295：x86 软件客户机页面 walk PS 位处理缺陷 (XSA-176)

- CVE-2016-5403：virtio：通过客户机在主机上造成的不受限制的内存分配问题导致 DoS (XSA-184) (bsc#990923)

- CVE-2016-6351：scsi：esp：esp_do_dma 中的越界写入访问 (bsc#990843) 已修复以下非安全问题：

- bsc#986586：“modprobe xenblk”（非 xen 内核）引导期间发生内存不足 (oom)

- bsc#900418：无法在 SLES12 XEN 上执行转储

- bsc#953339：针对 PVonHVM 客户机中的仿真 PCI 设备，将 SUSE 特定拔除协议实现到 qemu-xen-upstream

- bsc#953362：针对 PVonHVM 客户机中的仿真 PCI 设备，将 SUSE 特定拔除协议实现到 qemu-xen-upstream

- bsc#953518：针对 PVonHVM 客户机中的仿真 PCI 设备，将 SUSE 特定拔除协议实现到 qemu-xen-upstream

- bsc#984981：针对 PVonHVM 客户机中的仿真 PCI 设备，将 SUSE 特定拔除协议实现到 qemu-xen-upstream

- bsc#954872：脚本 block-dmmd 未按预期工作 - libxl：错误：libxl_dm.c（其他补丁）

- bsc#982695：qemu 无法从 xvda 引导 HVM 客户机

- bsc#958848：/usr/src/packages/BUILD/xen-4.4.2-testing/obj/default/ba lloon/balloon.c:407 的 HVM 客户机崩溃

- bsc#949889：无法在 SLES12SP1Beta3 XEN 底下安装 32 位 paravirt VM

- bsc#954872：脚本 block-dmmd 未按预期工作 - libxl：错误 - libxl：错误：libxl_dm.c（另一项修改）

- bsc#961600：使用大于当前内存的最大内存配置 Xen HVM domU 时性能不佳

- bsc#963161：升级到最新维护更新之后，将 VF 指派给 Windows VM 时，Windows VM 会在加载期间卡住

- bsc#976058：运行简单 HVM 客户机时发生 Xen 错误 (Post Alpha 2 xen+qemu)

- bsc#973631：AWS EC2 kdump 问题

- bsc#957986：间接描述符与 Amazon 区块后端不兼容

- bsc#964427：丢弃设备区块：失败 - 输入/输出错误

- bsc#985503：修复 vif-route

- bsc#978413：PV 客户机从 SLES11 SP4 升级到 SLES 12 SP2 alpha3 失败

请注意，Tenable Network Security 已直接从 SUSE 安全公告中提取上述描述块。Tenable 已尝试在不引入其他问题的情况下尽可能进行了自动整理和排版。

ID	名稱	產品	系列	已發布	已更新	嚴重性
93296	SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2016:2093-1) (Bunker Buster)	Nessus	SuSE Local Security Checks	2016/9/2	2021/1/6	critical
92751	Ubuntu 14.04 LTS / 16.04 LTS : QEMU vulnerabilities (USN-3047-1)	Nessus	Ubuntu Local Security Checks	2016/8/5	2023/10/20	high
131585	EulerOS 2.0 SP2 : qemu-kvm (EulerOS-SA-2019-2431)	Nessus	Huawei Local Security Checks	2019/12/4	2024/4/8	critical
200007	RHEL 7 : kvm (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	2024/6/3	2024/6/3	critical
92277	Fedora 24 : 2:qemu (2016-a80eab65ba)	Nessus	Fedora Local Security Checks	2016/7/15	2021/1/11	critical
94309	openSUSE Security Update : qemu (openSUSE-2016-1234)	Nessus	SuSE Local Security Checks	2016/10/27	2021/1/19	high
94758	SUSE SLES12 Security Update : qemu (SUSE-SU-2016:2781-1)	Nessus	SuSE Local Security Checks	2016/11/14	2021/1/6	high
93296	SUSE SLED12 / SLES12 安全性更新：xen (SUSE-SU-2016:2093-1)	Nessus	SuSE Local Security Checks	2016/9/2	2021/1/6	critical
92299	Fedora 22：2：qemu (2016-ea3002b577)	Nessus	Fedora Local Security Checks	2016/7/15	2021/1/11	critical
92059	Fedora 23：xen (2016-103752d2a9)	Nessus	Fedora Local Security Checks	2016/7/14	2021/1/11	high
92751	Ubuntu 14.04 LTS / 16.04 LTS：QEMU 弱點 (USN-3047-1)	Nessus	Ubuntu Local Security Checks	2016/8/5	2023/10/20	high
92299	Fedora 22：2：qemu (2016-ea3002b577)	Nessus	Fedora Local Security Checks	2016/7/15	2021/1/11	critical
92059	Fedora 23：xen (2016-103752d2a9)	Nessus	Fedora Local Security Checks	2016/7/14	2021/1/11	high
92751	Ubuntu 14.04 LTS / 16.04 LTS：QEMU 漏洞 (USN-3047-1)	Nessus	Ubuntu Local Security Checks	2016/8/5	2023/10/20	high
93296	SUSE SLED12 / SLES12 安全更新：xen (SUSE-SU-2016:2093-1)	Nessus	SuSE Local Security Checks	2016/9/2	2021/1/6	critical

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