Security update for xen SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2021:1028-1 Final 1 1 2021-04-06T15:54:42Z current 2021-04-06T15:54:42Z 2021-04-06T15:54:42Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for xen This update for xen fixes the following issues: - CVE-2021-3308: VUL-0: xen: IRQ vector leak on x86 (bsc#1181254, XSA-360) - CVE-2021-28687: HVM soft-reset crashes toolstack (bsc#1183072, XSA-368) - L3: conring size for XEN HV's with huge memory to small. Inital Xen logs cut (bsc#1177204) - L3: XEN domU crashed on resume when using the xl unpause command (bsc#1182576) - L3: xen: no needsreboot flag set (bsc#1180690) - kdump of HVM fails, soft-reset not handled by libxl (bsc#1179148) - openQA job causes libvirtd to dump core when running kdump inside domain (bsc#1181989) - Upstream bug fixes (bsc#1027519) The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). Container suse/sles/15.2/virt-launcher:0.38.1-2021-1028,SUSE-2021-1028,SUSE-SLE-Module-Basesystem-15-SP2-2021-1028,SUSE-SLE-Module-Server-Applications-15-SP2-2021-1028,SUSE-SUSE-MicroOS-5.0-2021-1028 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-20211028-1/ Link for SUSE-SU-2021:1028-1 https://lists.suse.com/pipermail/sle-security-updates/2021-April/008586.html E-Mail link for SUSE-SU-2021:1028-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1027519 SUSE Bug 1027519 https://bugzilla.suse.com/1177204 SUSE Bug 1177204 https://bugzilla.suse.com/1179148 SUSE Bug 1179148 https://bugzilla.suse.com/1180690 SUSE Bug 1180690 https://bugzilla.suse.com/1181254 SUSE Bug 1181254 https://bugzilla.suse.com/1181989 SUSE Bug 1181989 https://bugzilla.suse.com/1182576 SUSE Bug 1182576 https://bugzilla.suse.com/1183072 SUSE Bug 1183072 https://www.suse.com/security/cve/CVE-2021-28687/ SUSE CVE CVE-2021-28687 page https://www.suse.com/security/cve/CVE-2021-3308/ SUSE CVE CVE-2021-3308 page Container suse/sles/15.2/virt-launcher:0.38.1 SUSE Linux Enterprise Micro 5.0 SUSE Linux Enterprise Module for Basesystem 15 SP2 SUSE Linux Enterprise Module for Server Applications 15 SP2 xen-libs-4.13.2_08-3.25.3 xen-4.13.2_08-3.25.3 xen-devel-4.13.2_08-3.25.3 xen-doc-html-4.13.2_08-3.25.3 xen-libs-32bit-4.13.2_08-3.25.3 xen-libs-64bit-4.13.2_08-3.25.3 xen-tools-4.13.2_08-3.25.3 xen-tools-domU-4.13.2_08-3.25.3 xen-tools-xendomains-wait-disk-4.13.2_08-3.25.3 xen-libs-4.13.2_08-3.25.3 as a component of Container suse/sles/15.2/virt-launcher:0.38.1 xen-libs-4.13.2_08-3.25.3 as a component of SUSE Linux Enterprise Micro 5.0 xen-libs-4.13.2_08-3.25.3 as a component of SUSE Linux Enterprise Module for Basesystem 15 SP2 xen-tools-domU-4.13.2_08-3.25.3 as a component of SUSE Linux Enterprise Module for Basesystem 15 SP2 xen-4.13.2_08-3.25.3 as a component of SUSE Linux Enterprise Module for Server Applications 15 SP2 xen-devel-4.13.2_08-3.25.3 as a component of SUSE Linux Enterprise Module for Server Applications 15 SP2 xen-tools-4.13.2_08-3.25.3 as a component of SUSE Linux Enterprise Module for Server Applications 15 SP2 xen-tools-xendomains-wait-disk-4.13.2_08-3.25.3 as a component of SUSE Linux Enterprise Module for Server Applications 15 SP2 HVM soft-reset crashes toolstack libxl requires all data structures passed across its public interface to be initialized before use and disposed of afterwards by calling a specific set of functions. Many internal data structures also require this initialize / dispose discipline, but not all of them. When the "soft reset" feature was implemented, the libxl__domain_suspend_state structure didn't require any initialization or disposal. At some point later, an initialization function was introduced for the structure; but the "soft reset" path wasn't refactored to call the initialization function. When a guest nwo initiates a "soft reboot", uninitialized data structure leads to an assert() when later code finds the structure in an unexpected state. The effect of this is to crash the process monitoring the guest. How this affects the system depends on the structure of the toolstack. For xl, this will have no security-relevant effect: every VM has its own independent monitoring process, which contains no state. The domain in question will hang in a crashed state, but can be destroyed by `xl destroy` just like any other non-cooperating domain. For daemon-based toolstacks linked against libxl, such as libvirt, this will crash the toolstack, losing the state of any in-progress operations (localized DoS), and preventing further administrator operations unless the daemon is configured to restart automatically (system-wide DoS). If crashes "leak" resources, then repeated crashes could use up resources, also causing a system-wide DoS. CVE-2021-28687 Container suse/sles/15.2/virt-launcher:0.38.1:xen-libs-4.13.2_08-3.25.3 SUSE Linux Enterprise Micro 5.0:xen-libs-4.13.2_08-3.25.3 SUSE Linux Enterprise Module for Basesystem 15 SP2:xen-libs-4.13.2_08-3.25.3 SUSE Linux Enterprise Module for Basesystem 15 SP2:xen-tools-domU-4.13.2_08-3.25.3 SUSE Linux Enterprise Module for Server Applications 15 SP2:xen-4.13.2_08-3.25.3 SUSE Linux Enterprise Module for Server Applications 15 SP2:xen-devel-4.13.2_08-3.25.3 SUSE Linux Enterprise Module for Server Applications 15 SP2:xen-tools-4.13.2_08-3.25.3 SUSE Linux Enterprise Module for Server Applications 15 SP2:xen-tools-xendomains-wait-disk-4.13.2_08-3.25.3 moderate 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C 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-20211028-1/ https://www.suse.com/security/cve/CVE-2021-28687.html CVE-2021-28687 https://bugzilla.suse.com/1183072 SUSE Bug 1183072 An issue was discovered in Xen 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x. An x86 HVM guest with PCI pass through devices can force the allocation of all IDT vectors on the system by rebooting itself with MSI or MSI-X capabilities enabled and entries setup. Such reboots will leak any vectors used by the MSI(-X) entries that the guest might had enabled, and hence will lead to vector exhaustion on the system, not allowing further PCI pass through devices to work properly. HVM guests with PCI pass through devices can mount a Denial of Service (DoS) attack affecting the pass through of PCI devices to other guests or the hardware domain. In the latter case, this would affect the entire host. CVE-2021-3308 Container suse/sles/15.2/virt-launcher:0.38.1:xen-libs-4.13.2_08-3.25.3 SUSE Linux Enterprise Micro 5.0:xen-libs-4.13.2_08-3.25.3 SUSE Linux Enterprise Module for Basesystem 15 SP2:xen-libs-4.13.2_08-3.25.3 SUSE Linux Enterprise Module for Basesystem 15 SP2:xen-tools-domU-4.13.2_08-3.25.3 SUSE Linux Enterprise Module for Server Applications 15 SP2:xen-4.13.2_08-3.25.3 SUSE Linux Enterprise Module for Server Applications 15 SP2:xen-devel-4.13.2_08-3.25.3 SUSE Linux Enterprise Module for Server Applications 15 SP2:xen-tools-4.13.2_08-3.25.3 SUSE Linux Enterprise Module for Server Applications 15 SP2:xen-tools-xendomains-wait-disk-4.13.2_08-3.25.3 moderate 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C 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-20211028-1/ https://www.suse.com/security/cve/CVE-2021-3308.html CVE-2021-3308 https://bugzilla.suse.com/1181254 SUSE Bug 1181254