Security update for xen SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2023:0846-1 Final 1 1 2023-03-21T12:27:29Z current 2023-03-21T12:27:29Z 2023-03-21T12:27:29Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for xen This update for xen fixes the following issues: - CVE-2022-42332: Fixed use-after-free in x86 shadow plus log-dirty mode (bsc#1209017). - CVE-2022-42331: Fixed speculative vulnerability in 32bit SYSCALL path on x86 (bsc#1209019). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2023-846,SUSE-SLE-SERVER-12-SP2-BCL-2023-846 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2023/suse-su-20230846-1/ Link for SUSE-SU-2023:0846-1 https://lists.suse.com/pipermail/sle-security-updates/2023-March/014125.html E-Mail link for SUSE-SU-2023:0846-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1209017 SUSE Bug 1209017 https://bugzilla.suse.com/1209019 SUSE Bug 1209019 https://bugzilla.suse.com/1209188 SUSE Bug 1209188 https://www.suse.com/security/cve/CVE-2022-42331/ SUSE CVE CVE-2022-42331 page https://www.suse.com/security/cve/CVE-2022-42332/ SUSE CVE CVE-2022-42332 page SUSE Linux Enterprise Server 12 SP2-BCL xen-4.7.6_32-43.104.1 xen-devel-4.7.6_32-43.104.1 xen-doc-html-4.7.6_32-43.104.1 xen-libs-4.7.6_32-43.104.1 xen-libs-32bit-4.7.6_32-43.104.1 xen-libs-64bit-4.7.6_32-43.104.1 xen-tools-4.7.6_32-43.104.1 xen-tools-domU-4.7.6_32-43.104.1 xen-4.7.6_32-43.104.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL xen-doc-html-4.7.6_32-43.104.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL xen-libs-4.7.6_32-43.104.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL xen-libs-32bit-4.7.6_32-43.104.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL xen-tools-4.7.6_32-43.104.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL xen-tools-domU-4.7.6_32-43.104.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL x86: speculative vulnerability in 32bit SYSCALL path Due to an oversight in the very original Spectre/Meltdown security work (XSA-254), one entrypath performs its speculation-safety actions too late. In some configurations, there is an unprotected RET instruction which can be attacked with a variety of speculative attacks. CVE-2022-42331 SUSE Linux Enterprise Server 12 SP2-BCL:xen-4.7.6_32-43.104.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-doc-html-4.7.6_32-43.104.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-32bit-4.7.6_32-43.104.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-4.7.6_32-43.104.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-4.7.6_32-43.104.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-domU-4.7.6_32-43.104.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2023/suse-su-20230846-1/ https://www.suse.com/security/cve/CVE-2022-42331.html CVE-2022-42331 https://bugzilla.suse.com/1209019 SUSE Bug 1209019 x86 shadow plus log-dirty mode use-after-free In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Shadow mode maintains a pool of memory used for both shadow page tables as well as auxiliary data structures. To migrate or snapshot guests, Xen additionally runs them in so called log-dirty mode. The data structures needed by the log-dirty tracking are part of aformentioned auxiliary data. In order to keep error handling efforts within reasonable bounds, for operations which may require memory allocations shadow mode logic ensures up front that enough memory is available for the worst case requirements. Unfortunately, while page table memory is properly accounted for on the code path requiring the potential establishing of new shadows, demands by the log-dirty infrastructure were not taken into consideration. As a result, just established shadow page tables could be freed again immediately, while other code is still accessing them on the assumption that they would remain allocated. CVE-2022-42332 SUSE Linux Enterprise Server 12 SP2-BCL:xen-4.7.6_32-43.104.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-doc-html-4.7.6_32-43.104.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-32bit-4.7.6_32-43.104.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-4.7.6_32-43.104.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-4.7.6_32-43.104.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-domU-4.7.6_32-43.104.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2023/suse-su-20230846-1/ https://www.suse.com/security/cve/CVE-2022-42332.html CVE-2022-42332 https://bugzilla.suse.com/1209017 SUSE Bug 1209017