Multiple vulnerabilities have been discovered in the Xen hypervisor :

  - CVE-2018-19961 / CVE-2018-19962     Paul Durrant discovered that incorrect TLB handling     could result in denial of service, privilege escalation     or information leaks.

  - CVE-2018-19965     Matthew Daley discovered that incorrect handling of the     INVPCID instruction could result in denial of service by     PV guests.

  - CVE-2018-19966     It was discovered that a regression in the fix to     address CVE-2017-15595 could result in denial of     service, privilege escalation or information leaks by a     PV guest.

  - CVE-2018-19967     It was discovered that an error in some Intel CPUs could     result in denial of service by a guest instance.

This update for xen fixes the following issues :

CVE-2018-12207: Fixed a race condition where untrusted virtual machines could have been using the Instruction Fetch Unit of the Intel CPU to cause a Machine Exception during Page Size Change, causing the CPU core to be non-functional (bsc#1155945 XSA-304).

CVE-2018-19965: Fixed a DoS from attempting to use INVPCID with a non-canonical addresses (bsc#1115045 XSA-279).

CVE-2019-11135: Aborting an asynchronous TSX operation on Intel CPUs with Transactional Memory support could be used to facilitate side-channel information leaks out of microarchitectural buffers, similar to the previously described 'Microarchitectural Data Sampling' attack. (bsc#1152497 XSA-305).

CVE-2019-12067: Fixed a NULL pointer dereference in QEMU AHCI (bsc#1145652).

CVE-2019-12068: Fixed an infinite loop while executing script (bsc#1146874).

CVE-2019-12155: Fixed a NULL pointer dereference while releasing spice resources (bsc#1135905).

CVE-2019-14378: Fixed a heap buffer overflow during packet reassembly in slirp networking implementation (bsc#1143797).

CVE-2019-15890: Fixed a use-after-free during packet reassembly (bsc#1149813).

CVE-2019-17340: Fixed grant table transfer issues on large hosts (XSA-284 bsc#1126140).

CVE-2019-17341: Fixed a race with pass-through device hotplug (XSA-285 bsc#1126141).

CVE-2019-17342: Fixed steal_page violating page_struct access discipline (XSA-287 bsc#1126192).

CVE-2019-17343: Fixed an inconsistent PV IOMMU discipline (XSA-288 bsc#1126195).

CVE-2019-17344: Fixed a missing preemption in x86 PV page table unvalidation (XSA-290 bsc#1126196).

CVE-2019-17347: Fixed a PV kernel context switch corruption (XSA-293 bsc#1126201).

CVE-2019-18420: Fixed a hypervisor crash that could be caused by malicious x86 PV guests, resulting in a denial of service (bsc#1154448 XSA-296).

CVE-2019-18421: Fixed a privilege escalation through malicious PV guest administrators (bsc#1154458 XSA-299).

CVE-2019-18424: Fixed a privilege escalation through DMA to physical devices by untrusted domains (bsc#1154461 XSA-302).

CVE-2019-18425: Fixed a privilege escalation from 32-bit PV guest used mode (bsc#1154456 XSA-298).

CVE-2019-19577: Fixed an issue where a malicious guest administrator could have caused Xen to access data structures while they are being modified leading to a crash (bsc#1158007 XSA-311).

CVE-2019-19578: Fixed an issue where a malicious or buggy PV guest could have caused hypervisor crash resulting in denial of service affecting the entire host (bsc#1158005 XSA-309).

CVE-2019-19579: Fixed a privilege escalation where an untrusted domain with access to a physical device can DMA into host memory (bsc#1157888 XSA-306).

CVE-2019-19580: Fixed a privilege escalation where a malicious PV guest administrator could have been able to escalate their privilege to that of the host (bsc#1158006 XSA-310).

CVE-2019-19581: Fixed a potential out of bounds on 32-bit Arm (bsc#1158003 XSA-307).

CVE-2019-19583: Fixed improper checks which could have allowed HVM/PVH guest userspace code to crash the guest, leading to a guest denial of service (bsc#1158004 XSA-308).

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 xen fixes the following issues :

Security vulnerabilities fixed :

CVE-2018-19961, CVE-2018-19962: Fixed an issue related to insufficient TLB flushing with AMD IOMMUs, which potentially allowed a guest to escalate its privileges, may cause a Denial of Service (DoS) affecting the entire host, or may be able to access data it is not supposed to access. (XSA-275) (bsc#1115040)

CVE-2018-19965: Fixed an issue related to the INVPCID instruction in case non-canonical addresses are accessed, which may allow a guest to cause Xen to crash, resulting in a Denial of Service (DoS) affecting the entire host. (XSA-279) (bsc#1115045)

CVE-2018-19966: Fixed an issue related to a previous fix for XSA-240, which conflicted with shadow paging and allowed a guest to cause Xen to crash, resulting in a Denial of Service (DoS) (XSA-280) (bsc#1115047)

CVE-2018-19967: Fixed HLE constructs that allowed guests to lock up the host, resulting in a Denial of Service (DoS). (XSA-282) (bsc#1114988)

CVE-2018-19665: Fixed an integer overflow resulting in memory corruption in various Bluetooth functions, allowing this to crash qemu process resulting in Denial of Service (DoS). (bsc#1117756).

CVE-2018-18849: Fixed an out of bounds memory access in the LSI53C895A SCSI host bus adapter emulation, which allowed a user and/or process to crash the qemu process resulting in a Denial of Service (DoS).
(bsc#1114423)

Fixed an integer overflow in ccid_card_vscard_read(), which allowed for memory corruption. (bsc#1112188)

CVE-2017-13672: Fixed an out of bounds read access during display update (bsc#1056336)

CVE-2018-17958: Fixed an integer overflow leading to a buffer overflow in the rtl8139 component (bsc#1111007)

CVE-2018-17962: Fixed an integer overflow leading to a buffer overflow in the pcnet component (bsc#1111011)

CVE-2018-17963: Fixed an integer overflow in relation to large packet sizes, leading to a denial of service (DoS). (bsc#1111014)

CVE-2018-10839: Fixed an integer overflow leading to a buffer overflow in the ne2000 component (bsc#1110924)

Other bugs fixed: Fixed an issue related to a domU hang on SLE12-SP3 HV (bsc#1108940)

Upstream bug fixes (bsc#1027519)

Fixed crashing VMs when migrating between dom0 hosts (bsc#1031382)

Fixed an issue with xpti=no-dom0 not working as expected (bsc#1105528)

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 xen fixes the following issues :

Security issues fixed :

  - CVE-2018-19967: Fixed HLE constructs that allowed guests     to lock up the host, resulting in a Denial of Service     (DoS). (XSA-282) (bsc#1114988)

  - CVE-2019-6778: Fixed a heap buffer overflow in tcp_emu()     found in slirp (bsc#1123157).

  - Fixed an issue which could allow malicious or buggy     guests with passed through PCI devices to be able to     escalate their privileges, crash the host, or access     data belonging to other guests. Additionally memory     leaks were also possible (bsc#1126140).

  - Fixed a race condition issue which could allow malicious     PV guests to escalate their privilege to that of the     hypervisor (bsc#1126141).

  - Fixed an issue which could allow a malicious     unprivileged guest userspace process to escalate its     privilege to that of other userspace processes in the     same guest and potentially thereby to that of the guest     operating system (bsc#1126201).

  - CVE-2019-9824: Fixed an information leak in SLiRP     networking implementation which could allow a     user/process to read uninitialised stack memory contents     (bsc#1129623).

  - CVE-2018-19961 CVE-2018-19962: Fixed insufficient TLB     flushing / improper large page mappings with AMD IOMMUs     (XSA-275)(bsc#1115040).

  - CVE-2018-19965: Fixed denial of service issue from     attempting to use INVPCID with a non-canonical addresses     (XSA-279)(bsc#1115045).

  - CVE-2018-19966: Fixed issue introduced by XSA-240 that     could have caused conflicts with shadow paging     (XSA-280)(bsc#1115047).

  - Fixed an issue which could allow malicious PV guests may     cause a host crash or gain access to data pertaining to     other guests.Additionally, vulnerable configurations are     likely to be unstable even in the absence of an attack     (bsc#1126198).

  - Fixed multiple access violations introduced by     XENMEM_exchange hypercall which could allow a single PV     guest to leak arbitrary amounts of memory, leading to a     denial of service (bsc#1126192).

  - Fixed an issue which could allow malicious 64bit PV     guests to cause a host crash (bsc#1127400).

  - Fixed an issue which could allow malicious or buggy x86     PV guest kernels to mount a Denial of Service attack     affecting the whole system (bsc#1126197).

  - Fixed an issue which could allow an untrusted PV domain     with access to a physical device to DMA into its own     pagetables leading to privilege escalation     (bsc#1126195).

  - Fixed an issue which could allow a malicious or buggy     x86 PV guest kernels can mount a Denial of Service     attack affecting the whole system (bsc#1126196).

Other issues addressed :

  - Upstream bug fixes (bsc#1027519)

  - Fixed an issue where live migrations were failing when     spectre was enabled on xen boot cmdline (bsc#1116380).

  - Fixed an issue where setup of grant_tables and other     variables may fail (bsc#1126325).

  - Fixed a building issue (bsc#1119161).

  - Fixed an issue where xpti=no-dom0 was not working as     expected (bsc#1105528).

  - Packages should no longer use /var/adm/fillup-templates     (bsc#1069468). 

  - Added Xen cmdline option 'suse_vtsc_tolerance' to avoid     TSC emulation for HVM domUs (bsc#1026236).

This update was imported from the SUSE:SLE-12-SP3:Update update project.

ID	名稱	產品	系列	已發布	已更新	嚴重性
121168	Debian DSA-4369-1 : xen - security update	Nessus	Debian Local Security Checks	2019/1/15	2025/4/16	high
133763	SUSE SLES12 Security Update : xen (SUSE-SU-2020:0388-1)	Nessus	SuSE Local Security Checks	2020/2/18	2024/3/27	critical
121004	SUSE SLES11 Security Update : xen (SUSE-SU-2019:13921-1)	Nessus	SuSE Local Security Checks	2019/1/8	2024/6/27	critical
124147	openSUSE Security Update : xen (openSUSE-2019-1226)	Nessus	SuSE Local Security Checks	2019/4/18	2024/5/31	high

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