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SUSE SLES12 Security Update : xen (SUSE-SU-2020:3050-1)
high Nessus Plugin ID 143820
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Synopsis
The remote SUSE host is missing one or more security updates.Description
This update for xen fixes the following issues :bsc#1177409 - VUL-0: CVE-2020-27673: xen: x86 PV guest INVLPG-like flushes may leave stale TLB entries (XSA-286)
bsc#1177412 - VUL-0: CVE-2020-27672: xen: Race condition in Xen mapping code (XSA-345)
bsc#1177413 - VUL-0: CVE-2020-27671: xen: undue deferral of IOMMU TLB flushes (XSA-346)
bsc#1177414 - VUL-0: CVE-2020-27670: xen: unsafe AMD IOMMU page table updates (XSA-347)
Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
Solution
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'.Alternatively you can run the command listed for your product :
SUSE Linux Enterprise Software Development Kit 12-SP5 :
zypper in -t patch SUSE-SLE-SDK-12-SP5-2020-3050=1
SUSE Linux Enterprise Server 12-SP5 :
zypper in -t patch SUSE-SLE-SERVER-12-SP5-2020-3050=1
See Also
https://bugzilla.suse.com/show_bug.cgi?id=1177409
https://bugzilla.suse.com/show_bug.cgi?id=1177412
https://bugzilla.suse.com/show_bug.cgi?id=1177413
https://bugzilla.suse.com/show_bug.cgi?id=1177414
https://www.suse.com/security/cve/CVE-2020-27670/
https://www.suse.com/security/cve/CVE-2020-27671/
https://www.suse.com/security/cve/CVE-2020-27672/
Plugin Details
Severity: High
ID: 143820
File Name: suse_SU-2020-3050-1.nasl
Version: 1.3
Type: local
Agent: unix
Family: SuSE Local Security Checks
Published: 12/9/2020
Updated: 5/11/2022
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: Medium
Base Score: 6.9
Temporal Score: 5.1
Vector: CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2020-27672
CVSS v3
Risk Factor: High
Base Score: 7.8
Temporal Score: 6.8
Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS Score Source: CVE-2020-27671
Vulnerability Information
CPE: p-cpe:/a:novell:suse_linux:xen-debugsource, p-cpe:/a:novell:suse_linux:xen-tools, p-cpe:/a:novell:suse_linux:xen-tools-domu-debuginfo, cpe:/o:novell:suse_linux:12, p-cpe:/a:novell:suse_linux:xen-tools-domu, p-cpe:/a:novell:suse_linux:xen, p-cpe:/a:novell:suse_linux:xen-tools-debuginfo, p-cpe:/a:novell:suse_linux:xen-libs-debuginfo, p-cpe:/a:novell:suse_linux:xen-libs, p-cpe:/a:novell:suse_linux:xen-doc-html
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 10/27/2020
Vulnerability Publication Date: 10/22/2020
Reference Information
CVE: CVE-2020-27670, CVE-2020-27671, CVE-2020-27672, CVE-2020-27673