Bugzilla – Bug 1189381
VUL-0: CVE-2021-28700: xen: xen/arm: No memory limit for dom0less domUs. (XSA-383)
Last modified: 2023-12-15 18:10:49 UTC
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Xen Security Advisory CVE-2021-28700 / XSA-383 xen/arm: No memory limit for dom0less domUs *** EMBARGOED UNTIL 2021-08-25 12:00 UTC *** ISSUE DESCRIPTION ================= The dom0less feature allows an administrator to create multiple unprivileged domains directly from Xen. Unfortunately, the memory limit from them is not set. This allow a domain to allocate memory beyond what an administrator originally configured. IMPACT ====== Malicious dom0less guest could drive Xen out of memory and may result to a Denial of Service (DoS) attack affecting the entire system. VULNERABLE SYSTEMS ================== Only Arm systems are vulnerable. Only domains created using the dom0less feature are affected. Only domains created using the dom0less feature can leverage the vulnerability. All versions of Xen since 4.12 are vulnerable. MITIGATION ========== There is no known mitigation. RESOLUTION ========== Applying the appropriate attached patch resolves this issue. Note that patches for released versions are generally prepared to apply to the stable branches, and may not apply cleanly to the most recent release tarball. Downstreams are encouraged to update to the tip of the stable branch before applying these patches. xsa383.patch xen-unstable - Xen 4.13.x xsa383-4.12.patch Xen 4.12.x $ sha256sum xsa383* 773fe38d5d182ce43b5552fcdf6ed08c33126ed728e40d94c5050f89bfb3bd4d xsa383.meta 260fc61f98425e5254c756c410fb5f3cebd07e1e7af6448c4479fdcfb126dd7d xsa383.patch 4b11776da87e1a0a21baf62633840a503ad850b0d66ade9b2cc35abf429a544b xsa383-4.12.patch $ DEPLOYMENT DURING EMBARGO ========================= Deployment of the patches and/or mitigations described above (or others which are substantially similar) is permitted during the embargo, even on public-facing systems with untrusted guest users and administrators. But: Distribution of updated software is prohibited (except to other members of the predisclosure list). Predisclosure list members who wish to deploy significantly different patches and/or mitigations, please contact the Xen Project Security Team. (Note: this during-embargo deployment notice is retained in post-embargo publicly released Xen Project advisories, even though it is then no longer applicable. This is to enable the community to have oversight of the Xen Project Security Team's decisionmaking.) For more information about permissible uses of embargoed information, consult the Xen Project community's agreed Security Policy: http://www.xenproject.org/security-policy.html -----BEGIN PGP SIGNATURE----- iQFABAEBCAAqFiEEI+MiLBRfRHX6gGCng/4UyVfoK9kFAmET77UMHHBncEB4ZW4u b3JnAAoJEIP+FMlX6CvZ/csH/2BsN/CqqWrIaucqEI0d+8dvFHowXVZ4/qLOYb6s 1ZtUTf/kesN6ZG9S21Z53uPLuSNF3UMxOLdh97S5jD2m7Q8EJ1zq2ndUnTYXcDln ks1fKho8qKaFAKbVAswZpvSVpJ05gA/yNcVjES80kHpn63IMWJ8P/M8TcfQJs5b8 rcnzS6jxOXrNLpvPfJpGo2E/CHcku77crls360ysOf0ncI4Pdy/+m80Do0VohGLR zrO8inZ+0GGLqluWRaSdXto1nkQupq1EBff0a2XwTk35eVZKj01z8vWAFE9NOtSA 6xy8CspZ4qg43jQpc8Ci9gmS17Q1GImIayQEviulTod/Qm0= =eLxA -----END PGP SIGNATURE-----
Created attachment 851713 [details] Upstream patches
Affected packages: - SUSE:SLE-12-SP5:Update - SUSE:SLE-15-SP1:Update - SUSE:SLE-15-SP2:Update - SUSE:SLE-15-SP3:Update
This is now public
# maintenance_jira_update_notice SUSE-SU-2021:2923-1: An update that solves 11 vulnerabilities and has 7 fixes is now available. Category: security (important) Bug References: 1027519,1176189,1179246,1183243,1183877,1185682,1186428,1186429,1186433,1186434,1187406,1188050,1189373,1189376,1189378,1189380,1189381,1189882 CVE References: CVE-2021-0089,CVE-2021-28690,CVE-2021-28692,CVE-2021-28693,CVE-2021-28694,CVE-2021-28695,CVE-2021-28696,CVE-2021-28697,CVE-2021-28698,CVE-2021-28699,CVE-2021-28700 JIRA References: Sources used: SUSE Linux Enterprise Module for Server Applications 15-SP3 (src): xen-4.14.2_04-3.9.1 SUSE Linux Enterprise Module for Basesystem 15-SP3 (src): xen-4.14.2_04-3.9.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
# maintenance_jira_update_notice SUSE-SU-2021:2922-1: An update that solves 11 vulnerabilities and has 9 fixes is now available. Category: security (important) Bug References: 1027519,1137251,1176189,1179148,1179246,1180491,1181989,1183877,1185682,1186428,1186429,1186433,1186434,1188050,1189373,1189376,1189378,1189380,1189381,1189882 CVE References: CVE-2021-0089,CVE-2021-28690,CVE-2021-28692,CVE-2021-28693,CVE-2021-28694,CVE-2021-28695,CVE-2021-28696,CVE-2021-28697,CVE-2021-28698,CVE-2021-28699,CVE-2021-28700 JIRA References: Sources used: SUSE MicroOS 5.0 (src): xen-4.13.3_02-3.34.1 SUSE Linux Enterprise Module for Server Applications 15-SP2 (src): xen-4.13.3_02-3.34.1 SUSE Linux Enterprise Module for Basesystem 15-SP2 (src): xen-4.13.3_02-3.34.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
# maintenance_jira_update_notice SUSE-SU-2021:2924-1: An update that solves 15 vulnerabilities and has 6 fixes is now available. Category: security (important) Bug References: 1027519,1179246,1180491,1180846,1182654,1183243,1185682,1186428,1186429,1186433,1186434,1187369,1187376,1187378,1188050,1189373,1189376,1189378,1189380,1189381,1189882 CVE References: CVE-2021-0089,CVE-2021-20255,CVE-2021-28690,CVE-2021-28692,CVE-2021-28693,CVE-2021-28694,CVE-2021-28695,CVE-2021-28696,CVE-2021-28697,CVE-2021-28698,CVE-2021-28699,CVE-2021-28700,CVE-2021-3592,CVE-2021-3594,CVE-2021-3595 JIRA References: Sources used: SUSE Linux Enterprise Software Development Kit 12-SP5 (src): xen-4.12.4_12-3.49.1 SUSE Linux Enterprise Server 12-SP5 (src): xen-4.12.4_12-3.49.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
# maintenance_jira_update_notice openSUSE-SU-2021:2923-1: An update that solves 11 vulnerabilities and has 7 fixes is now available. Category: security (important) Bug References: 1027519,1176189,1179246,1183243,1183877,1185682,1186428,1186429,1186433,1186434,1187406,1188050,1189373,1189376,1189378,1189380,1189381,1189882 CVE References: CVE-2021-0089,CVE-2021-28690,CVE-2021-28692,CVE-2021-28693,CVE-2021-28694,CVE-2021-28695,CVE-2021-28696,CVE-2021-28697,CVE-2021-28698,CVE-2021-28699,CVE-2021-28700 JIRA References: Sources used: openSUSE Leap 15.3 (src): xen-4.14.2_04-3.9.1
# maintenance_jira_update_notice SUSE-SU-2021:2925-1: An update that solves 11 vulnerabilities and has 7 fixes is now available. Category: security (important) Bug References: 1027519,1179148,1179246,1180491,1180846,1181989,1183243,1186428,1186429,1186433,1186434,1188050,1189373,1189376,1189378,1189380,1189381,1189882 CVE References: CVE-2021-0089,CVE-2021-28690,CVE-2021-28692,CVE-2021-28693,CVE-2021-28694,CVE-2021-28695,CVE-2021-28696,CVE-2021-28697,CVE-2021-28698,CVE-2021-28699,CVE-2021-28700 JIRA References: Sources used: SUSE Manager Server 4.0 (src): xen-4.12.4_12-3.52.1 SUSE Manager Retail Branch Server 4.0 (src): xen-4.12.4_12-3.52.1 SUSE Manager Proxy 4.0 (src): xen-4.12.4_12-3.52.1 SUSE Linux Enterprise Server for SAP 15-SP1 (src): xen-4.12.4_12-3.52.1 SUSE Linux Enterprise Server 15-SP1-LTSS (src): xen-4.12.4_12-3.52.1 SUSE Linux Enterprise Server 15-SP1-BCL (src): xen-4.12.4_12-3.52.1 SUSE Linux Enterprise High Performance Computing 15-SP1-LTSS (src): xen-4.12.4_12-3.52.1 SUSE Linux Enterprise High Performance Computing 15-SP1-ESPOS (src): xen-4.12.4_12-3.52.1 SUSE Enterprise Storage 6 (src): xen-4.12.4_12-3.52.1 SUSE CaaS Platform 4.0 (src): xen-4.12.4_12-3.52.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
# maintenance_jira_update_notice openSUSE-SU-2021:1236-1: An update that solves 11 vulnerabilities and has 9 fixes is now available. Category: security (important) Bug References: 1027519,1137251,1176189,1179148,1179246,1180491,1181989,1183877,1185682,1186428,1186429,1186433,1186434,1188050,1189373,1189376,1189378,1189380,1189381,1189882 CVE References: CVE-2021-0089,CVE-2021-28690,CVE-2021-28692,CVE-2021-28693,CVE-2021-28694,CVE-2021-28695,CVE-2021-28696,CVE-2021-28697,CVE-2021-28698,CVE-2021-28699,CVE-2021-28700 JIRA References: Sources used: openSUSE Leap 15.2 (src): xen-4.13.3_02-lp152.2.27.1
ARM is actually not supported with Xen but we do take the patches for the convenience of backporting later fixes. All versions of Xen since 4.12 (SLE12-SP5, SLE15-SP1 ->) are vulnerable.