Security update for xen SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2020:2234-1 Final 1 1 2020-08-13T09:33:35Z current 2020-08-13T09:33:35Z 2020-08-13T09:33:35Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for xen This update for xen fixes the following issues: - bsc#1174543 - secure boot related fixes - bsc#1163019 - CVE-2020-8608: Potential OOB access due to unsafe snprintf() usages - bsc#1169392 - CVE-2020-11742: Bad continuation handling in GNTTABOP_copy - bsc#1168140 - CVE-2020-11740, CVE-2020-11741: Multiple xenoprof issues - bsc#1168142 - CVE-2020-11739: Missing memory barriers in read-write unlock paths The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2020-2234,SUSE-OpenStack-Cloud-7-2020-2234,SUSE-SLE-SAP-12-SP2-2020-2234,SUSE-SLE-SERVER-12-SP2-2020-2234,SUSE-SLE-SERVER-12-SP2-BCL-2020-2234 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2020/suse-su-20202234-1/ Link for SUSE-SU-2020:2234-1 https://lists.suse.com/pipermail/sle-security-updates/2020-August/007264.html E-Mail link for SUSE-SU-2020:2234-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1163019 SUSE Bug 1163019 https://bugzilla.suse.com/1168140 SUSE Bug 1168140 https://bugzilla.suse.com/1168142 SUSE Bug 1168142 https://bugzilla.suse.com/1169392 SUSE Bug 1169392 https://bugzilla.suse.com/1174543 SUSE Bug 1174543 https://www.suse.com/security/cve/CVE-2020-11739/ SUSE CVE CVE-2020-11739 page https://www.suse.com/security/cve/CVE-2020-11740/ SUSE CVE CVE-2020-11740 page https://www.suse.com/security/cve/CVE-2020-11741/ SUSE CVE CVE-2020-11741 page https://www.suse.com/security/cve/CVE-2020-11742/ SUSE CVE CVE-2020-11742 page https://www.suse.com/security/cve/CVE-2020-8608/ SUSE CVE CVE-2020-8608 page SUSE Linux Enterprise Server 12 SP2-BCL SUSE Linux Enterprise Server 12 SP2-LTSS SUSE Linux Enterprise Server for SAP Applications 12 SP2 SUSE OpenStack Cloud 7 xen-4.7.6_08-43.64.1 xen-devel-4.7.6_08-43.64.1 xen-doc-html-4.7.6_08-43.64.1 xen-libs-4.7.6_08-43.64.1 xen-libs-32bit-4.7.6_08-43.64.1 xen-tools-4.7.6_08-43.64.1 xen-tools-domU-4.7.6_08-43.64.1 xen-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL xen-doc-html-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL xen-libs-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL xen-libs-32bit-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL xen-tools-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL xen-tools-domU-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL xen-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server 12 SP2-LTSS xen-doc-html-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server 12 SP2-LTSS xen-libs-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server 12 SP2-LTSS xen-libs-32bit-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server 12 SP2-LTSS xen-tools-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server 12 SP2-LTSS xen-tools-domU-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server 12 SP2-LTSS xen-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP2 xen-doc-html-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP2 xen-libs-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP2 xen-libs-32bit-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP2 xen-tools-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP2 xen-tools-domU-4.7.6_08-43.64.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP2 xen-4.7.6_08-43.64.1 as a component of SUSE OpenStack Cloud 7 xen-doc-html-4.7.6_08-43.64.1 as a component of SUSE OpenStack Cloud 7 xen-libs-4.7.6_08-43.64.1 as a component of SUSE OpenStack Cloud 7 xen-libs-32bit-4.7.6_08-43.64.1 as a component of SUSE OpenStack Cloud 7 xen-tools-4.7.6_08-43.64.1 as a component of SUSE OpenStack Cloud 7 xen-tools-domU-4.7.6_08-43.64.1 as a component of SUSE OpenStack Cloud 7 An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service or possibly gain privileges because of missing memory barriers in read-write unlock paths. The read-write unlock paths don't contain a memory barrier. On Arm, this means a processor is allowed to re-order the memory access with the preceding ones. In other words, the unlock may be seen by another processor before all the memory accesses within the "critical" section. As a consequence, it may be possible to have a writer executing a critical section at the same time as readers or another writer. In other words, many of the assumptions (e.g., a variable cannot be modified after a check) in the critical sections are not safe anymore. The read-write locks are used in hypercalls (such as grant-table ones), so a malicious guest could exploit the race. For instance, there is a small window where Xen can leak memory if XENMAPSPACE_grant_table is used concurrently. A malicious guest may be able to leak memory, or cause a hypervisor crash resulting in a Denial of Service (DoS). Information leak and privilege escalation cannot be excluded. CVE-2020-11739 SUSE Linux Enterprise Server 12 SP2-BCL:xen-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-doc-html-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-32bit-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-domU-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-doc-html-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-libs-32bit-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-libs-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-tools-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-tools-domU-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-doc-html-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-libs-32bit-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-libs-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-tools-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-tools-domU-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-doc-html-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-libs-32bit-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-libs-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-tools-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-tools-domU-4.7.6_08-43.64.1 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/2020/suse-su-20202234-1/ https://www.suse.com/security/cve/CVE-2020-11739.html CVE-2020-11739 https://bugzilla.suse.com/1168142 SUSE Bug 1168142 An issue was discovered in xenoprof in Xen through 4.13.x, allowing guest OS users (without active profiling) to obtain sensitive information about other guests. Unprivileged guests can request to map xenoprof buffers, even if profiling has not been enabled for those guests. These buffers were not scrubbed. CVE-2020-11740 SUSE Linux Enterprise Server 12 SP2-BCL:xen-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-doc-html-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-32bit-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-domU-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-doc-html-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-libs-32bit-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-libs-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-tools-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-tools-domU-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-doc-html-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-libs-32bit-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-libs-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-tools-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-tools-domU-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-doc-html-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-libs-32bit-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-libs-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-tools-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-tools-domU-4.7.6_08-43.64.1 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/2020/suse-su-20202234-1/ https://www.suse.com/security/cve/CVE-2020-11740.html CVE-2020-11740 https://bugzilla.suse.com/1168140 SUSE Bug 1168140 https://bugzilla.suse.com/1178658 SUSE Bug 1178658 An issue was discovered in xenoprof in Xen through 4.13.x, allowing guest OS users (with active profiling) to obtain sensitive information about other guests, cause a denial of service, or possibly gain privileges. For guests for which "active" profiling was enabled by the administrator, the xenoprof code uses the standard Xen shared ring structure. Unfortunately, this code did not treat the guest as a potential adversary: it trusts the guest not to modify buffer size information or modify head / tail pointers in unexpected ways. This can crash the host (DoS). Privilege escalation cannot be ruled out. CVE-2020-11741 SUSE Linux Enterprise Server 12 SP2-BCL:xen-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-doc-html-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-32bit-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-domU-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-doc-html-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-libs-32bit-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-libs-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-tools-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-tools-domU-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-doc-html-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-libs-32bit-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-libs-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-tools-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-tools-domU-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-doc-html-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-libs-32bit-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-libs-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-tools-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-tools-domU-4.7.6_08-43.64.1 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/2020/suse-su-20202234-1/ https://www.suse.com/security/cve/CVE-2020-11741.html CVE-2020-11741 https://bugzilla.suse.com/1168140 SUSE Bug 1168140 https://bugzilla.suse.com/1178658 SUSE Bug 1178658 An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of bad continuation handling in GNTTABOP_copy. Grant table operations are expected to return 0 for success, and a negative number for errors. The fix for CVE-2017-12135 introduced a path through grant copy handling where success may be returned to the caller without any action taken. In particular, the status fields of individual operations are left uninitialised, and may result in errant behaviour in the caller of GNTTABOP_copy. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to copy a grant, it hits the incorrect exit path. This returns success to the caller without doing anything, which may cause crashes or other incorrect behaviour. CVE-2020-11742 SUSE Linux Enterprise Server 12 SP2-BCL:xen-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-doc-html-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-32bit-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-domU-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-doc-html-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-libs-32bit-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-libs-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-tools-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-tools-domU-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-doc-html-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-libs-32bit-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-libs-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-tools-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-tools-domU-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-doc-html-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-libs-32bit-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-libs-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-tools-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-tools-domU-4.7.6_08-43.64.1 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/2020/suse-su-20202234-1/ https://www.suse.com/security/cve/CVE-2020-11742.html CVE-2020-11742 https://bugzilla.suse.com/1169392 SUSE Bug 1169392 https://bugzilla.suse.com/1178658 SUSE Bug 1178658 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 SUSE Linux Enterprise Server 12 SP2-BCL:xen-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-doc-html-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-32bit-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-domU-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-doc-html-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-libs-32bit-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-libs-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-tools-4.7.6_08-43.64.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xen-tools-domU-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-doc-html-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-libs-32bit-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-libs-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-tools-4.7.6_08-43.64.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xen-tools-domU-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-doc-html-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-libs-32bit-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-libs-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-tools-4.7.6_08-43.64.1 SUSE OpenStack Cloud 7:xen-tools-domU-4.7.6_08-43.64.1 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/2020/suse-su-20202234-1/ https://www.suse.com/security/cve/CVE-2020-8608.html CVE-2020-8608 https://bugzilla.suse.com/1163018 SUSE Bug 1163018 https://bugzilla.suse.com/1163019 SUSE Bug 1163019