リモートの SUSE Linux SUSE15ホストには、openSUSE-SU-2021:1043-1 のアドバイザリに記載された複数の脆弱性の影響を受けるパッケージがインストールされています。

  - libslirp 4.0.0は、QEMU 4.1.0で使用される場合、ip_input.c内のip_reassにおけるメモリ解放後使用(Use-After-Free)があります。(CVE-2019-15890)

  - QEMUエミュレーターのSLiRPネットワークの実装に領域外読み取りの脆弱性が見つかりました。
    この欠陥は、ICMPエコーリクエスト(別名:ping)の応答中に、icmp6_send_echoreply()ルーチンで発生します。この欠陥により、悪意のあるゲストがホストメモリのコンテンツを漏えいし、情報漏えいが発生する可能性があります。この欠陥は、4.3.1より前のlibslirpのバージョンに影響を与えます。(CVE-2020-10756)

  - 5.2.0より前のバージョンのQEMUのUSBエミュレーターに、領域外読み取り/書き込みアクセスの欠陥が見つかりました。この問題は、do_token_in、do_token_outルーチンでUSBDevice「setup_len」がその「data_buf [4096]」を超えるとき、ゲストからのUSBパケットを処理するときに発生します。この欠陥により、ゲストユーザーがQEMUプロセスをクラッシュさせ、サービス拒否を引き起こしたり、ホストのQEMUプロセスの権限で任意のコードを実行したりする可能性があります。 (CVE-2020-14364 )

  - hw/sd/sdhci.cがSDHC_BLKSIZEの場合に書き込み操作が正しく処理されないため、QEMU 5.0.0にはexec.c内のflatview_read_continueにおけるヒープベースのバッファオーバーフローがあります。(CVE-2020-25085)

  - **拒否** この候補番号は使用しないでください。理由: この候補はCVE-2020-28916の複製です(CVE-2020-25707)

  - 到達可能なアサーションの問題が、QEMUのUSB EHCIエミュレーションコードで見つかりました。これは、DMAメモリマップ障害の処理の欠落により、USBリクエストの処理中に発生する可能性があります。ゲスト内の悪意のある特権ユーザーがこの欠陥を悪用して偽造のUSBリクエストを送信し、ホストでQEMUプロセスをクラッシュさせ、サービス拒否を引き起こす可能性があります。(CVE-2020-25723)

  - 4.3.1 までの libslirp にある ncsi.c は、パケットの合計長を超えている場合でも、特定量のヘッダーデータの読み取りを試みるため、バッファオーバーリードを引き起こします。(CVE-2020-29129)

  - 4.3.1までの libslirp にある slirp.c は、パケットの合計長を超えている場合でも、特定量のヘッダーデータの読み取りを試みるため、バッファオーバーリードを引き起こします。(CVE-2020-29130)

  - libslirp 4.1.0では、QEMU 4.2.0で使用されているように、tcp_subr.cでsnprintfの戻り値が誤って使用されることにより、後続のコードでバッファオーバーフローが発生します。 (CVE-2020-8608)

  - **拒否** この候補番号は使用しないでください。ConsultIDs: ありません。理由: この候補は、そのCNAにより撤回されました。注意: ありません。(CVE-2021-3419)

  - 6.0 までのバージョンの QEMU の virtio vhost-user GPU デバイス (vhost-user-gpu) で、いくつかのメモリリークが見つかりました。これらは、有効な期間後にメモリが不適切に解放される (解放される) ため、contrib/vhost-user-gpu/vhost-user-gpu.c および contrib/vhost-user-gpu/virgl.c に存在します。(CVE-2021-3544)

  - 6.0 までのバージョンの QEMU の virtio vhost-user GPU デバイス (vhost-user-gpu) で、情報漏洩の脆弱性が見つかりました。この欠陥は contrib/vhost-user-gpu/virgl.c の virgl_cmd_get_capset_info() にあり、初期化されていないメモリの読み取りが原因で発生する可能性があります。悪意のあるゲストは、この問題を悪用して、ホストからメモリを漏洩させることができます。(CVE-2021-3545)

  - 6.0 までのバージョンの QEMU の vhost-user-gpu に欠陥が見つかりました。領域外書き込みの脆弱性により、悪意のあるユーザーがホストで QEMU プロセスをクラッシュさせ、サービス拒否を引き起こしたり、ホストの QEMU プロセスの権限で任意のコードを実行したりする可能性があります。この脆弱性が最大の脅威となるのは、データの機密性と整合性、ならびにシステムの可用性です。(CVE-2021-3546)

Nessus はこの問題をテストしておらず、代わりにアプリケーションの自己報告されたバージョン番号にのみ依存しています。

The version of qemu installed on the remote host is prior to 3.1.0-8. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2021-1671 advisory.

    A heap buffer overflow flaw was found in the iSCSI support of QEMU. This flaw could lead to an out-of-     bounds read access and possible information disclosure from the QEMU process memory to a malicious guest.
    The highest threat from this vulnerability is to data confidentiality. (CVE-2020-11947)

    An infinite loop flaw was found in the e1000e NIC emulation code of QEMU. This issue occurs in the     e1000e_write_packet_to_guest() routine while processing bogus RX descriptor data transmitted by the guest.
    This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of     service. (CVE-2020-25707)

    A reachable assertion vulnerability was found in the USB EHCI emulation code of QEMU. This issue occurs     while processing USB requests due to missed handling of DMA memory map failure. This flaw allows a     malicious privileged user within the guest to send bogus USB requests and crash the QEMU process on the     host, resulting in a denial of service. The highest threat from this vulnerability is to system     availability. (CVE-2020-25723)

    A flaw was found in the memory management API of QEMU during the initialization of a memory region cache.
    This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO     operations. A guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial     of service. (CVE-2020-27821)

    An out-of-bounds access issue was found in the SLiRP user networking implementation of QEMU. It could     occur while processing ARP/NCSI packets, if the packet length was shorter than required to accommodate     respective protocol headers and payload. A privileged guest user may use this flaw to potentially leak     host information bytes. (CVE-2020-29129)

    An out-of-bounds access issue was found in the SLiRP user networking implementation of QEMU. It could     occur while processing ARP/NCSI packets, if the packet length was shorter than required to accommodate     respective protocol headers and payload. A privileged guest user may use this flaw to potentially leak     host information bytes. (CVE-2020-29130)

    An out-of-bounds read-access flaw was found in the ATAPI Emulator of QEMU. This issue occurs while     processing the ATAPI read command if the logical block address(LBA) is set to an invalid value. A guest     user may use this flaw to crash the QEMU process on the host resulting in a denial of service.
    (CVE-2020-29443)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2021:1762 advisory.

  - iscsi_aio_ioctl_cb in block/iscsi.c in QEMU 4.1.0 has a heap-based buffer over-read that may disclose     unrelated information from process memory to an attacker. (CVE-2020-11947)

  - In QEMU through 5.0.0, an assertion failure can occur in the network packet processing. This issue affects     the e1000e and vmxnet3 network devices. A malicious guest user/process could use this flaw to abort the     QEMU process on the host, resulting in a denial of service condition in net_tx_pkt_add_raw_fragment in     hw/net/net_tx_pkt.c. (CVE-2020-16092)

  - A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible     for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit     access control driver. Specifically, clients connecting to the read-write socket with limited ACL     permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or     potentially escalate their privileges on the system. The highest threat from this vulnerability is to data     confidentiality and integrity as well as system availability. (CVE-2020-25637)

  - A reachable assertion issue was found in the USB EHCI emulation code of QEMU. It could occur while     processing USB requests due to missing handling of DMA memory map failure. A malicious privileged user     within the guest may abuse this flaw to send bogus USB requests and crash the QEMU process on the host,     resulting in a denial of service. (CVE-2020-25723)

  - A flaw was found in the memory management API of QEMU during the initialization of a memory region cache.
    This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO     operations. A guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial     of service. This flaw affects QEMU versions prior to 5.2.0. (CVE-2020-27821)

  - hw/net/e1000e_core.c in QEMU 5.0.0 has an infinite loop via an RX descriptor with a NULL buffer address.
    (CVE-2020-28916)

  - ncsi.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of     header data even if that exceeds the total packet length. (CVE-2020-29129)

  - slirp.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of     header data even if that exceeds the total packet length. (CVE-2020-29130)

  - ide_atapi_cmd_reply_end in hw/ide/atapi.c in QEMU 5.1.0 allows out-of-bounds read access because a buffer     index is not validated. (CVE-2020-29443)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This update for xen fixes the following issues :

CVE-2020-29480: Fixed an issue which could have allowed leak of non-sensitive data to administrator guests (bsc#117949 XSA-115).

CVE-2020-29481: Fixed an issue which could have allowd to new domains to inherit existing node permissions (bsc#1179498 XSA-322).

CVE-2020-29483: Fixed an issue where guests could disturb domain cleanup (bsc#1179502 XSA-325).

CVE-2020-29484: Fixed an issue where guests could crash xenstored via watchs (bsc#1179501 XSA-324).

CVE-2020-29566: Fixed an undue recursion in x86 HVM context switch code (bsc#1179506 XSA-348).

CVE-2020-29570: Fixed an issue where FIFO event channels control block related ordering (bsc#1179514 XSA-358).

CVE-2020-29571: Fixed an issue where FIFO event channels control structure ordering (bsc#1179516 XSA-359).

CVE-2020-29130: Fixed an out-of-bounds access while processing ARP packets (bsc#1179477).

Fixed an issue where dump-core shows missing nr_pages during core (bsc#1176782).

Multiple other bugs (bsc#1027519)

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.

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2022-9172 advisory.

    - Bounds check for block exceeding page length (CVE-2021-3504)       resolves: rhbz#1950501

    libguestfs
    - Document CVE-2021-4158 and CVE-2021-3947 as fixed (Mark Kanda) [Orabug: 33719302] [Orabug: 33754145]     {CVE-2021-4158} {CVE-2021-3947}
    - hw/block/fdc: Kludge missing floppy drive to fix CVE-2021-20196 (Philippe Mathieu-Daude) [Orabug:
    32439466] {CVE-2021-20196}
    - hw/block/fdc: Extract blk_create_empty_drive() (Philippe Mathieu-Daude) [Orabug: 32439466]     {CVE-2021-20196}
    - net: vmxnet3: validate configuration values during activate (CVE-2021-20203) (Prasad J Pandit) [Orabug:
    32559476] {CVE-2021-20203}
    - lan9118: switch to use qemu_receive_packet() for loopback (Alexander Bulekov) [Orabug: 32560540]     {CVE-2021-3416}
    - pcnet: switch to use qemu_receive_packet() for loopback (Alexander Bulekov) [Orabug: 32560540]     {CVE-2021-3416}
    - rtl8139: switch to use qemu_receive_packet() for loopback (Alexander Bulekov) [Orabug: 32560540]     {CVE-2021-3416}
    - tx_pkt: switch to use qemu_receive_packet_iov() for loopback (Jason Wang) [Orabug: 32560540]     {CVE-2021-3416}
    - sungem: switch to use qemu_receive_packet() for loopback (Jason Wang) [Orabug: 32560540] {CVE-2021-3416}
    - dp8393x: switch to use qemu_receive_packet() for loopback packet (Jason Wang) [Orabug: 32560540]     {CVE-2021-3416}
    - e1000: switch to use qemu_receive_packet() for loopback (Jason Wang) [Orabug: 32560540] {CVE-2021-3416}
    - net: introduce qemu_receive_packet() (Jason Wang) [Orabug: 32560540] {CVE-2021-3416}
    - Update slirp to address various CVEs (Mark Kanda) [Orabug: 32208456] [Orabug: 33014409] [Orabug:
    33014414] [Orabug: 33014417] [Orabug: 33014420] {CVE-2020-29129} {CVE-2020-29130} {CVE-2021-3592}     {CVE-2021-3593} {CVE-2021-3594} {CVE-2021-3595}
    - uas: add stream number sanity checks (Gerd Hoffmann) [Orabug: 33280793] {CVE-2021-3713}
    - usbredir: fix free call (Gerd Hoffmann) [Orabug: 33198441] {CVE-2021-3682}
    - hw/scsi/scsi-disk: MODE_PAGE_ALLS not allowed in MODE SELECT commands (Mauro Matteo Cascella) [Orabug:
    33548490] {CVE-2021-3930}
    - e1000: fix tx re-entrancy problem (Jon Maloy) [Orabug: 32560552] {CVE-2021-20257}
    - pvrdma: Fix the ring init error flow (Marcel Apfelbaum) [Orabug: 33120142] {CVE-2021-3608}
    - pvrdma: Ensure correct input on ring init (Marcel Apfelbaum) [Orabug: 33120146] {CVE-2021-3607}
    - hw/rdma: Fix possible mremap overflow in the pvrdma device (Marcel Apfelbaum) [Orabug: 33120084]     {CVE-2021-3582}
    - vhost-user-gpu: reorder free calls (Gerd Hoffmann) [Orabug: 32950701] {CVE-2021-3544}
    - vhost-user-gpu: abstract vg_cleanup_mapping_iov (Li Qiang) [Orabug: 32950716] {CVE-2021-3546}
    - vhost-user-gpu: fix OOB write in 'virgl_cmd_get_capset' (Li Qiang) [Orabug: 32950716] {CVE-2021-3546}
    - vhost-user-gpu: fix memory leak in 'virgl_resource_attach_backing' (Li Qiang) [Orabug: 32950701]     {CVE-2021-3544}
    - vhost-user-gpu: fix memory leak in 'virgl_cmd_resource_unref' (Li Qiang) [Orabug: 32950701]     {CVE-2021-3544}
    - vhost-user-gpu: fix memory leak while calling 'vg_resource_unref' (Li Qiang) [Orabug: 32950701]     {CVE-2021-3544}
    - vhost-user-gpu: fix memory leak in vg_resource_attach_backing (Li Qiang) [Orabug: 32950701]     {CVE-2021-3544}
    - vhost-user-gpu: fix resource leak in 'vg_resource_create_2d' (Li Qiang) [Orabug: 32950701]     {CVE-2021-3544}
    - vhost-user-gpu: fix memory disclosure in virgl_cmd_get_capset_info (Li Qiang) [Orabug: 32950708]     {CVE-2021-3545}
    - usb: limit combined packets to 1 MiB (Gerd Hoffmann) [Orabug: 32842778] {CVE-2021-3527}
    - usb/redir: avoid dynamic stack allocation (Gerd Hoffmann) [Orabug: 32842778] {CVE-2021-3527}
    - mptsas: Remove unused MPTSASState 'pending' field (Michael Tokarev) [Orabug: 32470463] {CVE-2021-3392}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2022:0119 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2018-12130:
    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/documents/corporate-information/SA00233-microcode-     update-guidance_05132019.pdf

    CVE-2018-13405:
    The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create     files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and     is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a     plain file whose group ownership is that group. The intended behavior was that the non-member can trigger     creation of a directory (but not a plain file) whose group ownership is that group. The non-member can     escalate privileges by making the plain file executable and SGID.

    CVE-2019-10132:
    A vulnerability was found in libvirt >= 4.1.0 in the virtlockd-admin.socket and virtlogd-admin.socket     systemd units. A missing SocketMode configuration parameter allows any user on the host to connect using     virtlockd-admin-sock or virtlogd-admin-sock and perform administrative tasks against the virtlockd and     virtlogd daemons.

    CVE-2019-10161:
    It was discovered that libvirtd before versions 4.10.1 and 5.4.1 would permit read-only clients to use the     virDomainSaveImageGetXMLDesc() API, specifying an arbitrary path which would be accessed with the     permissions of the libvirtd process. An attacker with access to the libvirtd socket could use this to     probe the existence of arbitrary files, cause denial of service or cause libvirtd to execute arbitrary     programs.

    CVE-2019-10166:
    It was discovered that libvirtd, versions 4.x.x before 4.10.1 and 5.x.x before 5.4.1, would permit     readonly clients to use the virDomainManagedSaveDefineXML() API, which would permit them to modify managed     save state files. If a managed save had already been created by a privileged user, a local attacker could     modify this file such that libvirtd would execute an arbitrary program when the domain was resumed.

    CVE-2019-10167:
    The virConnectGetDomainCapabilities() libvirt API, versions 4.x.x before 4.10.1 and 5.x.x before 5.4.1,     accepts an emulatorbin argument to specify the program providing emulation for a domain. Since v1.2.19,     libvirt will execute that program to probe the domain's capabilities. Read-only clients could specify an     arbitrary path for this argument, causing libvirtd to execute a crafted executable with its own     privileges.

    CVE-2019-10168:
    The virConnectBaselineHypervisorCPU() and virConnectCompareHypervisorCPU() libvirt APIs, 4.x.x before     4.10.1 and 5.x.x before 5.4.1, accept an emulator argument to specify the program providing emulation     for a domain. Since v1.2.19, libvirt will execute that program to probe the domain's capabilities. Read-     only clients could specify an arbitrary path for this argument, causing libvirtd to execute a crafted     executable with its own privileges.

    CVE-2019-11135:
    TSX Asynchronous Abort condition on some CPUs utilizing speculative execution may allow an authenticated     user to potentially enable information disclosure via a side channel with local access.

    CVE-2019-12155:
    interface_release_resource in hw/display/qxl.c in QEMU 3.1.x through 4.0.0 has a NULL pointer dereference.

    CVE-2019-14378:
    ip_reass in ip_input.c in libslirp 4.0.0 has a heap-based buffer overflow via a large packet because it     mishandles a case involving the first fragment.

    CVE-2019-14842:
    Structured reply is a feature of the newstyle NBD protocol allowing the server to send a reply in chunks.
    A bounds check which was supposed to test for chunk offsets smaller than the beginning of the request did     not work because of signed/unsigned confusion. If one of these chunks contains a negative offset then data     under control of the server is written to memory before the read buffer supplied by the client. If the     read buffer is located on the stack then this allows the stack return address from nbd_pread() to be     trivially modified, allowing arbitrary code execution under the control of the server. If the buffer is     located on the heap then other memory objects before the buffer can be overwritten, which again would     usually lead to arbitrary code execution.

    CVE-2019-15890:
    libslirp 4.0.0, as used in QEMU 4.1.0, has a use-after-free in ip_reass in ip_input.c.

    CVE-2019-20485:
    qemu/qemu_driver.c in libvirt before 6.0.0 mishandles the holding of a monitor job during a query to a     guest agent, which allows attackers to cause a denial of service (API blockage).

    CVE-2019-6501:
    In QEMU 3.1, scsi_handle_inquiry_reply in hw/scsi/scsi-generic.c allows out-of-bounds write and read     operations.

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

    CVE-2020-10703:
    A NULL pointer dereference was found in the libvirt API responsible introduced in upstream version 3.10.0,     and fixed in libvirt 6.0.0, for fetching a storage pool based on its target path. In more detail, this     flaw affects storage pools created without a target path such as network-based pools like gluster and RBD.
    Unprivileged users with a read-only connection could abuse this flaw to crash the libvirt daemon,     resulting in a potential denial of service.

    CVE-2020-10756:
    An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator.
    This flaw occurs in the icmp6_send_echoreply() routine while replying to an ICMP echo request, also known     as ping. This flaw allows a malicious guest to leak the contents of the host memory, resulting in possible     information disclosure. This flaw affects versions of libslirp before 4.3.1.

    CVE-2020-11947:
    iscsi_aio_ioctl_cb in block/iscsi.c in QEMU 4.1.0 has a heap-based buffer over-read that may disclose     unrelated information from process memory to an attacker.

    CVE-2020-14301:
    An information disclosure vulnerability was found in libvirt in versions before 6.3.0. HTTP cookies used     to access network-based disks were saved in the XML dump of the guest domain. This flaw allows an attacker     to access potentially sensitive information in the domain configuration via the `dumpxml` command.

    CVE-2020-14339:
    A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU     process. This file descriptor allows for privileged operations to happen against the device-mapper on the     host. This flaw allows a malicious guest user or process to perform operations outside of their standard     permissions, potentially causing serious damage to the host operating system. The highest threat from this     vulnerability is to confidentiality, integrity, as well as system availability.

    CVE-2020-14364:
    An out-of-bounds read/write access flaw was found in the USB emulator of the QEMU in versions before     5.2.0. This issue occurs while processing USB packets from a guest when USBDevice 'setup_len' exceeds its     'data_buf[4096]' in the do_token_in, do_token_out routines. This flaw allows a guest user to crash the     QEMU process, resulting in a denial of service, or the potential execution of arbitrary code with the     privileges of the QEMU process on the host.

    CVE-2020-15859:
    QEMU 4.2.0 has a use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e     packet with the data's address set to the e1000e's MMIO address.

    CVE-2020-16092:
    In QEMU through 5.0.0, an assertion failure can occur in the network packet processing. This issue affects     the e1000e and vmxnet3 network devices. A malicious guest user/process could use this flaw to abort the     QEMU process on the host, resulting in a denial of service condition in net_tx_pkt_add_raw_fragment in     hw/net/net_tx_pkt.c.

    CVE-2020-1711:
    An out-of-bounds heap buffer access flaw was found in the way the iSCSI Block driver in QEMU versions     2.12.0 before 4.2.1 handled a response coming from an iSCSI server while checking the status of a Logical     Address Block (LBA) in an iscsi_co_block_status() routine. A remote user could use this flaw to crash the     QEMU process, resulting in a denial of service or potential execution of arbitrary code with privileges of     the QEMU process on the host.

    CVE-2020-1983:
    A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows     crafted packets to cause a denial of service.

    CVE-2020-25637:
    A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible     for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit     access control driver. Specifically, clients connecting to the read-write socket with limited ACL     permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or     potentially escalate their privileges on the system. The highest threat from this vulnerability is to data     confidentiality and integrity as well as system availability.

    CVE-2020-25723:
    A reachable assertion issue was found in the USB EHCI emulation code of QEMU. It could occur while     processing USB requests due to missing handling of DMA memory map failure. A malicious privileged user     within the guest may abuse this flaw to send bogus USB requests and crash the QEMU process on the host,     resulting in a denial of service.

    CVE-2020-27821:
    A flaw was found in the memory management API of QEMU during the initialization of a memory region cache.
    This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO     operations. A guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial     of service. This flaw affects QEMU versions prior to 5.2.0.

    CVE-2020-28916:
    hw/net/e1000e_core.c in QEMU 5.0.0 has an infinite loop via an RX descriptor with a NULL buffer address.

    CVE-2020-29130:
    slirp.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of     header data even if that exceeds the total packet length.

    CVE-2020-29443:
    ide_atapi_cmd_reply_end in hw/ide/atapi.c in QEMU 5.1.0 allows out-of-bounds read access because a buffer     index is not validated.

    CVE-2020-7039:
    tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC     DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which     can lead to a DoS or potential execute arbitrary code.

    CVE-2021-20257:
    An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing     transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid     values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The     highest threat from this vulnerability is to system availability.

    CVE-2021-3592:
    An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the bootp_input() function and could occur while processing a udp packet that is smaller than     the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of     uninitialized heap memory from the host. The highest threat from this vulnerability is to data     confidentiality. This flaw affects libslirp versions prior to 4.6.0.

    CVE-2021-3593:
    An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the     size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0.

    CVE-2021-3594:
    An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the udp_input() function and could occur while processing a udp packet that is smaller than the     size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0.

    CVE-2021-3595:
    An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the     size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0.

    CVE-2021-3631:
    A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.

    CVE-2021-3667:
    An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in     the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly     released on ACL permission failure. Clients connecting to the read-write socket with limited ACL     permissions could use this flaw to acquire the lock and prevent other users from accessing storage     pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability     is to system availability.

    CVE-2021-3930:
    An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE     SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious     guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This update for qemu fixes the following issues :

Fix OOB access in sm501 device emulation (CVE-2020-12829, bsc#1172385)

Fix OOB access possibility in MegaRAID SAS 8708EM2 emulation (CVE-2020-13362 bsc#1172383)

Fix use-after-free in usb xhci packet handling (CVE-2020-25723, bsc#1178934)

Fix use-after-free in usb ehci packet handling (CVE-2020-25084, bsc#1176673)

Fix OOB access in usb hcd-ohci emulation (CVE-2020-25624, bsc#1176682)

Fix infinite loop (DoS) in usb hcd-ohci emulation (CVE-2020-25625, bsc#1176684)

Fix guest triggerable assert in shared network handling code (CVE-2020-27617, bsc#1178174)

Fix OOB access in atapi emulation (CVE-2020-29443, bsc#1181108)

Fix NULL pointer deref. (DoS) in mmio ops (CVE-2020-15469, bsc#1173612)

Fix infinite loop (DoS) in e1000 device emulation (CVE-2021-20257, bsc#1182577)

Fix OOB access (stack overflow) in rtl8139 NIC emulation (CVE-2021-3416, bsc#1182968)

Fix OOB access (stack overflow) in other NIC emulations (CVE-2021-3416)

Fix OOB access in SLIRP ARP packet processing (CVE-2020-29130, bsc#1179467)

Fix NULL pointer dereference possibility (DoS) in MegaRAID SAS 8708EM2 emulation (CVE-2020-13659 bsc#1172386

Fix OOB access in iscsi (CVE-2020-11947 bsc#1180523)

Fix OOB access in vmxnet3 emulation (CVE-2021-20203 bsc#1181639)

Fix buffer overflow in the XGMAC device (CVE-2020-15863 bsc#1174386)

Fix DoS in packet processing of various emulated NICs (CVE-2020-16092 bsc#1174641)

Fix OOB access while processing USB packets (CVE-2020-14364 bsc#1175441)

Fix package scripts to not use hard-coded paths for temporary working directories and log files (bsc#1182425)

Fix potential privilege escalation in virtfs (CVE-2021-20181 bsc#1182137)

Fix OOB access possibility in ES1370 audio device emulation (CVE-2020-13361 bsc#1172384)

Fix OOB access in ROM loading (CVE-2020-13765 bsc#1172478)

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.

This update for qemu fixes the following issues :

Fix out-of-bounds access issue while doing multi block SDMA (CVE-2020-25085, bsc#1176681)

Fix out-of-bounds read information disclosure in icmp6_send_echoreply (CVE-2020-10756, bsc#1172380)

QEMU BIOS fails to read stage2 loader on s390x (bsc#1186290)

Change dependency from CONFIG_VFIO back to CONFIG_LINUX (bsc#1179725)

For the record, these issues are fixed in this package already. Most are alternate references to previously mentioned issues:
(CVE-2019-15890, bsc#1149813, CVE-2020-8608, bsc#1163019, CVE-2020-14364, bsc#1175534, CVE-2020-25707, bsc#1178683, CVE-2020-25723, bsc#1178935, CVE-2020-29130, bsc#1179477, CVE-2020-29129, bsc#1179484, CVE-2021-20257, bsc#1182846, CVE-2021-3419, bsc#1182975)

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.

The remote SUSE Linux SLES11 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:14704-1 advisory.

  - The vmware-vga driver (hw/display/vmware_vga.c) in QEMU allows local guest users to write to qemu memory     locations and gain privileges via unspecified parameters related to rectangle handling. (CVE-2014-3689)

  - The VNC websocket frame decoder in QEMU allows remote attackers to cause a denial of service (memory and     CPU consumption) via a large (1) websocket payload or (2) HTTP headers section. (CVE-2015-1779)

  - In QEMU through 5.0.0, an integer overflow was found in the SM501 display driver implementation. This flaw     occurs in the COPY_AREA macro while handling MMIO write operations through the sm501_2d_engine_write()     callback. A local attacker could abuse this flaw to crash the QEMU process in sm501_2d_operation() in     hw/display/sm501.c on the host, resulting in a denial of service. (CVE-2020-12829)

  - In QEMU 5.0.0 and earlier, es1370_transfer_audio in hw/audio/es1370.c does not properly validate the frame     count, which allows guest OS users to trigger an out-of-bounds access during an es1370_write() operation.
    (CVE-2020-13361)

  - In QEMU 5.0.0 and earlier, megasas_lookup_frame in hw/scsi/megasas.c has an out-of-bounds read via a     crafted reply_queue_head field from a guest OS user. (CVE-2020-13362)

  - rom_copy() in hw/core/loader.c in QEMU 4.0 and 4.1.0 does not validate the relationship between two     addresses, which allows attackers to trigger an invalid memory copy operation. (CVE-2020-13765)

  - An out-of-bounds read/write access flaw was found in the USB emulator of the QEMU in versions before     5.2.0. This issue occurs while processing USB packets from a guest when USBDevice 'setup_len' exceeds its     'data_buf[4096]' in the do_token_in, do_token_out routines. This flaw allows a guest user to crash the     QEMU process, resulting in a denial of service, or the potential execution of arbitrary code with the     privileges of the QEMU process on the host. (CVE-2020-14364)

  - QEMU 5.0.0 has a use-after-free in hw/usb/hcd-xhci.c because the usb_packet_map return value is not     checked. (CVE-2020-25084)

  - hw/usb/hcd-ohci.c in QEMU 5.0.0 has a stack-based buffer over-read via values obtained from the host     controller driver. (CVE-2020-25624)

  - hw/usb/hcd-ohci.c in QEMU 5.0.0 has an infinite loop when a TD list has a loop. (CVE-2020-25625)

  - A reachable assertion issue was found in the USB EHCI emulation code of QEMU. It could occur while     processing USB requests due to missing handling of DMA memory map failure. A malicious privileged user     within the guest may abuse this flaw to send bogus USB requests and crash the QEMU process on the host,     resulting in a denial of service. (CVE-2020-25723)

  - slirp.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of     header data even if that exceeds the total packet length. (CVE-2020-29130)

  - ide_atapi_cmd_reply_end in hw/ide/atapi.c in QEMU 5.1.0 allows out-of-bounds read access because a buffer     index is not validated. (CVE-2020-29443)

  - A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This     flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges     on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as     system availability. (CVE-2021-20181)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:1947-1 advisory.

  - libslirp 4.0.0, as used in QEMU 4.1.0, has a use-after-free in ip_reass in ip_input.c. (CVE-2019-15890)

  - An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator.
    This flaw occurs in the icmp6_send_echoreply() routine while replying to an ICMP echo request, also known     as ping. This flaw allows a malicious guest to leak the contents of the host memory, resulting in possible     information disclosure. This flaw affects versions of libslirp before 4.3.1. (CVE-2020-10756)

  - hw/pci/msix.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access via a crafted address     in an msi-x mmio operation. (CVE-2020-13754)

  - An out-of-bounds read/write access flaw was found in the USB emulator of the QEMU in versions before     5.2.0. This issue occurs while processing USB packets from a guest when USBDevice 'setup_len' exceeds its     'data_buf[4096]' in the do_token_in, do_token_out routines. This flaw allows a guest user to crash the     QEMU process, resulting in a denial of service, or the potential execution of arbitrary code with the     privileges of the QEMU process on the host. (CVE-2020-14364)

  - A reachable assertion issue was found in the USB EHCI emulation code of QEMU. It could occur while     processing USB requests due to missing handling of DMA memory map failure. A malicious privileged user     within the guest may abuse this flaw to send bogus USB requests and crash the QEMU process on the host,     resulting in a denial of service. (CVE-2020-25723)

  - ncsi.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of     header data even if that exceeds the total packet length. (CVE-2020-29129)

  - slirp.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of     header data even if that exceeds the total packet length. (CVE-2020-29130)

  - In libslirp 4.1.0, as used in QEMU 4.2.0, tcp_subr.c misuses snprintf return values, leading to a buffer     overflow in later code. (CVE-2020-8608)

  - An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing     transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid     values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The     highest threat from this vulnerability is to system availability. (CVE-2021-20257)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2021:1043-1 advisory.

  - libslirp 4.0.0, as used in QEMU 4.1.0, has a use-after-free in ip_reass in ip_input.c. (CVE-2019-15890)

  - An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator.
    This flaw occurs in the icmp6_send_echoreply() routine while replying to an ICMP echo request, also known     as ping. This flaw allows a malicious guest to leak the contents of the host memory, resulting in possible     information disclosure. This flaw affects versions of libslirp before 4.3.1. (CVE-2020-10756)

  - An out-of-bounds read/write access flaw was found in the USB emulator of the QEMU in versions before     5.2.0. This issue occurs while processing USB packets from a guest when USBDevice 'setup_len' exceeds its     'data_buf[4096]' in the do_token_in, do_token_out routines. This flaw allows a guest user to crash the     QEMU process, resulting in a denial of service, or the potential execution of arbitrary code with the     privileges of the QEMU process on the host. (CVE-2020-14364)

  - QEMU 5.0.0 has a heap-based Buffer Overflow in flatview_read_continue in exec.c because hw/sd/sdhci.c     mishandles a write operation in the SDHC_BLKSIZE case. (CVE-2020-25085)

  - ** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. Reason: This candidate is a duplicate of CVE-2020-28916     (CVE-2020-25707)

  - A reachable assertion issue was found in the USB EHCI emulation code of QEMU. It could occur while     processing USB requests due to missing handling of DMA memory map failure. A malicious privileged user     within the guest may abuse this flaw to send bogus USB requests and crash the QEMU process on the host,     resulting in a denial of service. (CVE-2020-25723)

  - ncsi.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of     header data even if that exceeds the total packet length. (CVE-2020-29129)

  - slirp.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of     header data even if that exceeds the total packet length. (CVE-2020-29130)

  - In libslirp 4.1.0, as used in QEMU 4.2.0, tcp_subr.c misuses snprintf return values, leading to a buffer     overflow in later code. (CVE-2020-8608)

  - ** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by     its CNA. Notes: none. (CVE-2021-3419)

  - Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions     up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user-     gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime. (CVE-2021-3544)

  - An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of     QEMU in versions up to and including 6.0. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost-     user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit     this issue to leak memory from the host. (CVE-2021-3545)

  - A flaw was found in vhost-user-gpu of QEMU in versions up to and including 6.0. An out-of-bounds write     vulnerability can allow a malicious guest to crash the QEMU process on the host resulting in a denial of     service or potentially execute arbitrary code on the host with the privileges of the QEMU process. The     highest threat from this vulnerability is to data confidentiality and integrity as well as system     availability. (CVE-2021-3546)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	名稱	產品	系列	已發布	已更新	嚴重性
151619	openSUSE 15 セキュリティ更新: qemu (openSUSE-SU-2021:1043-1)	Nessus	SuSE Local Security Checks	2021/7/14	2023/12/8	high
150965	Amazon Linux 2 : qemu (ALAS-2021-1671)	Nessus	Amazon Linux Local Security Checks	2021/6/23	2024/12/11	medium
184965	Rocky Linux 8 : virt:rhel and virt-devel:rhel (RLSA-2021:1762)	Nessus	Rocky Linux Local Security Checks	2023/11/7	2023/11/7	medium
144637	SUSE SLES12 Security Update : xen (SUSE-SU-2020:3945-1)	Nessus	SuSE Local Security Checks	2020/12/30	2024/1/31	high
158359	Oracle Linux 8 : kvm_utils (ELSA-2022-9172)	Nessus	Oracle Linux Local Security Checks	2022/2/25	2024/11/2	high
236436	Alibaba Cloud Linux 3 : 0119: virt:rhel and virt-devel:rhel (ALINUX3-SA-2022:0119)	Nessus	Alibaba Cloud Linux Local Security Checks	2025/5/14	2025/5/15	critical
148966	SUSE SLES12 Security Update : qemu (SUSE-SU-2021:1305-1)	Nessus	SuSE Local Security Checks	2021/4/23	2024/1/3	high
150220	SUSE SLES12 Security Update : qemu (SUSE-SU-2021:1837-1)	Nessus	SuSE Local Security Checks	2021/6/3	2023/12/27	medium
150537	SUSE SLES11 Security Update : kvm (SUSE-SU-2021:14704-1)	Nessus	SuSE Local Security Checks	2021/6/10	2023/12/26	high
150733	SUSE SLES12 Security Update : qemu (SUSE-SU-2021:1947-1)	Nessus	SuSE Local Security Checks	2021/6/12	2023/7/13	medium
151619	openSUSE 15 Security Update : qemu (openSUSE-SU-2021:1043-1)	Nessus	SuSE Local Security Checks	2021/7/14	2023/12/8	high

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