This update for xen fixes the following issues :

  - CVE-2018-12207: Untrusted virtual machines on Intel CPUs     could exploit a race condition in 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)

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

  - CVE-2019-18423: A malicious guest administrator may     cause a hypervisor crash, resulting in a Denial of     Service (DoS). (bsc#1154460).

  - CVE-2019-18422: A malicious ARM guest might contrive to     arrange for critical Xen code to run with interrupts     erroneously enabled. This could lead to data corruption,     denial of service, or possibly even privilege     escalation. However a precise attack technique has not     been identified. (bsc#1154464)

  - CVE-2019-18424: An untrusted domain with access to a     physical device can DMA into host memory, leading to     privilege escalation. (bsc#1154461).

  - CVE-2019-18421: A malicious PV guest administrator may     have been able to escalate their privilege to that of     the host. (bsc#1154458).

  - CVE-2019-18425: 32-bit PV guest user mode could elevate     its privileges to that of the guest kernel.
    (bsc#1154456).

  - CVE-2019-18420: Malicious x86 PV guests may have caused     a hypervisor crash, resulting in a Denial of Service     (Dos). (bsc#1154448)

  - Upstream bug fixes (bsc#1027519)

This update was imported from the SUSE:SLE-15-SP1:Update update project.

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.

The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2020-0039 for details.

The remote host is affected by the vulnerability described in GLSA-202003-56 (Xen: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Xen. Please review the       referenced CVE identifiers for details.
  Impact :

    A local attacker could potentially gain privileges on the host system or       cause a Denial of Service condition.
  Workaround :

    There is no known workaround at this time.

This update for xen fixes the following issues :

  - CVE-2018-12207: Untrusted virtual machines on Intel CPUs     could exploit a race condition in 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)

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

  - CVE-2019-18425: 32-bit PV guest user mode could elevate     its privileges to that of the guest kernel.
    (bsc#1154456).

  - CVE-2019-18421: A malicious PV guest administrator may     have been able to escalate their privilege to that of     the host. (bsc#1154458).

  - CVE-2019-18420: Malicious x86 PV guests may have caused     a hypervisor crash, resulting in a Denial of Service     (Dos). (bsc#1154448)

This update was imported from the SUSE:SLE-15:Update update project.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
131062	openSUSE Security Update : xen (openSUSE-2019-2508)	Nessus	SuSE Local Security Checks	2019/11/15	2024/4/11	critical
133763	SUSE SLES12 Security Update : xen (SUSE-SU-2020:0388-1)	Nessus	SuSE Local Security Checks	2020/2/18	2024/3/27	critical
140019	OracleVM 3.4 : xen (OVMSA-2020-0039) (Bunker Buster) (Foreshadow) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout) (Meltdown) (POODLE) (Spectre)	Nessus	OracleVM Local Security Checks	2020/8/28	2026/1/9	critical
134964	GLSA-202003-56 : Xen: Multiple vulnerabilities (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout)	Nessus	Gentoo Local Security Checks	2020/3/27	2024/5/27	critical
131060	openSUSE Security Update : xen (openSUSE-2019-2506)	Nessus	SuSE Local Security Checks	2019/11/15	2024/4/11	critical

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