Security update for xen SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2021:1648-1 Final 1 1 2021-05-19T12:00:08Z current 2021-05-19T12:00:08Z 2021-05-19T12:00:08Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for xen This update for xen fixes the following issues: Security issue fixed: - CVE-2021-28689: Fixed some x86 speculative vulnerabilities with bare (non-shim) 32-bit PV guests (XSA-370) (bsc#1185104) - Make sure xencommons is in a format as expected by fillup. (bsc#1185682) Each comment needs to be followed by an enabled key. Otherwise fillup will remove manually enabled key=value pairs, along with everything that looks like a stale comment, during next pkg update - A recent systemd update caused a regression in xenstored.service systemd now fails to track units that use systemd-notify (bsc#1183790) - Added a delay between the call to systemd-notify and the final exit of the wrapper script (bsc#1185021, bsc#1185196) The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). Image SLES12-SP4-EC2-HVM-BYOS-2021-1648,Image SLES12-SP4-SAP-EC2-HVM-2021-1648,Image SLES12-SP4-SAP-EC2-HVM-BYOS-2021-1648,SUSE-2021-1648,SUSE-OpenStack-Cloud-9-2021-1648,SUSE-OpenStack-Cloud-Crowbar-9-2021-1648,SUSE-SLE-SAP-12-SP4-2021-1648,SUSE-SLE-SERVER-12-SP4-LTSS-2021-1648 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2021/suse-su-20211648-1/ Link for SUSE-SU-2021:1648-1 https://lists.suse.com/pipermail/sle-security-updates/2021-May/008788.html E-Mail link for SUSE-SU-2021:1648-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1183790 SUSE Bug 1183790 https://bugzilla.suse.com/1185021 SUSE Bug 1185021 https://bugzilla.suse.com/1185104 SUSE Bug 1185104 https://bugzilla.suse.com/1185196 SUSE Bug 1185196 https://bugzilla.suse.com/1185682 SUSE Bug 1185682 https://www.suse.com/security/cve/CVE-2021-28689/ SUSE CVE CVE-2021-28689 page Image SLES12-SP4-EC2-HVM-BYOS Image SLES12-SP4-SAP-EC2-HVM Image SLES12-SP4-SAP-EC2-HVM-BYOS SUSE Linux Enterprise Server 12 SP4-LTSS SUSE Linux Enterprise Server for SAP Applications 12 SP4 SUSE OpenStack Cloud 9 SUSE OpenStack Cloud Crowbar 9 xen-libs-4.11.4_18-2.54.1 xen-tools-domU-4.11.4_18-2.54.1 xen-4.11.4_18-2.54.1 xen-devel-4.11.4_18-2.54.1 xen-doc-html-4.11.4_18-2.54.1 xen-libs-32bit-4.11.4_18-2.54.1 xen-libs-64bit-4.11.4_18-2.54.1 xen-tools-4.11.4_18-2.54.1 xen-libs-4.11.4_18-2.54.1 as a component of Image SLES12-SP4-EC2-HVM-BYOS xen-tools-domU-4.11.4_18-2.54.1 as a component of Image SLES12-SP4-EC2-HVM-BYOS xen-libs-4.11.4_18-2.54.1 as a component of Image SLES12-SP4-SAP-EC2-HVM xen-tools-domU-4.11.4_18-2.54.1 as a component of Image SLES12-SP4-SAP-EC2-HVM xen-libs-4.11.4_18-2.54.1 as a component of Image SLES12-SP4-SAP-EC2-HVM-BYOS xen-tools-domU-4.11.4_18-2.54.1 as a component of Image SLES12-SP4-SAP-EC2-HVM-BYOS xen-4.11.4_18-2.54.1 as a component of SUSE Linux Enterprise Server 12 SP4-LTSS xen-doc-html-4.11.4_18-2.54.1 as a component of SUSE Linux Enterprise Server 12 SP4-LTSS xen-libs-4.11.4_18-2.54.1 as a component of SUSE Linux Enterprise Server 12 SP4-LTSS xen-libs-32bit-4.11.4_18-2.54.1 as a component of SUSE Linux Enterprise Server 12 SP4-LTSS xen-tools-4.11.4_18-2.54.1 as a component of SUSE Linux Enterprise Server 12 SP4-LTSS xen-tools-domU-4.11.4_18-2.54.1 as a component of SUSE Linux Enterprise Server 12 SP4-LTSS xen-4.11.4_18-2.54.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP4 xen-doc-html-4.11.4_18-2.54.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP4 xen-libs-4.11.4_18-2.54.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP4 xen-libs-32bit-4.11.4_18-2.54.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP4 xen-tools-4.11.4_18-2.54.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP4 xen-tools-domU-4.11.4_18-2.54.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP4 xen-4.11.4_18-2.54.1 as a component of SUSE OpenStack Cloud 9 xen-doc-html-4.11.4_18-2.54.1 as a component of SUSE OpenStack Cloud 9 xen-libs-4.11.4_18-2.54.1 as a component of SUSE OpenStack Cloud 9 xen-libs-32bit-4.11.4_18-2.54.1 as a component of SUSE OpenStack Cloud 9 xen-tools-4.11.4_18-2.54.1 as a component of SUSE OpenStack Cloud 9 xen-tools-domU-4.11.4_18-2.54.1 as a component of SUSE OpenStack Cloud 9 xen-4.11.4_18-2.54.1 as a component of SUSE OpenStack Cloud Crowbar 9 xen-doc-html-4.11.4_18-2.54.1 as a component of SUSE OpenStack Cloud Crowbar 9 xen-libs-4.11.4_18-2.54.1 as a component of SUSE OpenStack Cloud Crowbar 9 xen-libs-32bit-4.11.4_18-2.54.1 as a component of SUSE OpenStack Cloud Crowbar 9 xen-tools-4.11.4_18-2.54.1 as a component of SUSE OpenStack Cloud Crowbar 9 xen-tools-domU-4.11.4_18-2.54.1 as a component of SUSE OpenStack Cloud Crowbar 9 x86: Speculative vulnerabilities with bare (non-shim) 32-bit PV guests 32-bit x86 PV guest kernels run in ring 1. At the time when Xen was developed, this area of the i386 architecture was rarely used, which is why Xen was able to use it to implement paravirtualisation, Xen's novel approach to virtualization. In AMD64, Xen had to use a different implementation approach, so Xen does not use ring 1 to support 64-bit guests. With the focus now being on 64-bit systems, and the availability of explicit hardware support for virtualization, fixing speculation issues in ring 1 is not a priority for processor companies. Indirect Branch Restricted Speculation (IBRS) is an architectural x86 extension put together to combat speculative execution sidechannel attacks, including Spectre v2. It was retrofitted in microcode to existing CPUs. For more details on Spectre v2, see: http://xenbits.xen.org/xsa/advisory-254.html However, IBRS does not architecturally protect ring 0 from predictions learnt in ring 1. For more details, see: https://software.intel.com/security-software-guidance/deep-dives/deep-dive-indirect-branch-restricted-speculation Similar situations may exist with other mitigations for other kinds of speculative execution attacks. The situation is quite likely to be similar for speculative execution attacks which have yet to be discovered, disclosed, or mitigated. CVE-2021-28689 Image SLES12-SP4-EC2-HVM-BYOS:xen-libs-4.11.4_18-2.54.1 Image SLES12-SP4-EC2-HVM-BYOS:xen-tools-domU-4.11.4_18-2.54.1 Image SLES12-SP4-SAP-EC2-HVM-BYOS:xen-libs-4.11.4_18-2.54.1 Image SLES12-SP4-SAP-EC2-HVM-BYOS:xen-tools-domU-4.11.4_18-2.54.1 Image SLES12-SP4-SAP-EC2-HVM:xen-libs-4.11.4_18-2.54.1 Image SLES12-SP4-SAP-EC2-HVM:xen-tools-domU-4.11.4_18-2.54.1 SUSE Linux Enterprise Server 12 SP4-LTSS:xen-4.11.4_18-2.54.1 SUSE Linux Enterprise Server 12 SP4-LTSS:xen-doc-html-4.11.4_18-2.54.1 SUSE Linux Enterprise Server 12 SP4-LTSS:xen-libs-32bit-4.11.4_18-2.54.1 SUSE Linux Enterprise Server 12 SP4-LTSS:xen-libs-4.11.4_18-2.54.1 SUSE Linux Enterprise Server 12 SP4-LTSS:xen-tools-4.11.4_18-2.54.1 SUSE Linux Enterprise Server 12 SP4-LTSS:xen-tools-domU-4.11.4_18-2.54.1 SUSE Linux Enterprise Server for SAP Applications 12 SP4:xen-4.11.4_18-2.54.1 SUSE Linux Enterprise Server for SAP Applications 12 SP4:xen-doc-html-4.11.4_18-2.54.1 SUSE Linux Enterprise Server for SAP Applications 12 SP4:xen-libs-32bit-4.11.4_18-2.54.1 SUSE Linux Enterprise Server for SAP Applications 12 SP4:xen-libs-4.11.4_18-2.54.1 SUSE Linux Enterprise Server for SAP Applications 12 SP4:xen-tools-4.11.4_18-2.54.1 SUSE Linux Enterprise Server for SAP Applications 12 SP4:xen-tools-domU-4.11.4_18-2.54.1 SUSE OpenStack Cloud 9:xen-4.11.4_18-2.54.1 SUSE OpenStack Cloud 9:xen-doc-html-4.11.4_18-2.54.1 SUSE OpenStack Cloud 9:xen-libs-32bit-4.11.4_18-2.54.1 SUSE OpenStack Cloud 9:xen-libs-4.11.4_18-2.54.1 SUSE OpenStack Cloud 9:xen-tools-4.11.4_18-2.54.1 SUSE OpenStack Cloud 9:xen-tools-domU-4.11.4_18-2.54.1 SUSE OpenStack Cloud Crowbar 9:xen-4.11.4_18-2.54.1 SUSE OpenStack Cloud Crowbar 9:xen-doc-html-4.11.4_18-2.54.1 SUSE OpenStack Cloud Crowbar 9:xen-libs-32bit-4.11.4_18-2.54.1 SUSE OpenStack Cloud Crowbar 9:xen-libs-4.11.4_18-2.54.1 SUSE OpenStack Cloud Crowbar 9:xen-tools-4.11.4_18-2.54.1 SUSE OpenStack Cloud Crowbar 9:xen-tools-domU-4.11.4_18-2.54.1 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/2021/suse-su-20211648-1/ https://www.suse.com/security/cve/CVE-2021-28689.html CVE-2021-28689 https://bugzilla.suse.com/1185104 SUSE Bug 1185104