SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0737-1)

high Nessus Plugin ID 147464
New! Plugin Severity Now Using CVSS v3

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Synopsis

The remote SUSE host is missing one or more security updates.

Description

The SUSE Linux Enterprise 15 SP1 kernel was updated receive various security and bugfixes.

The following security bugs were fixed :

CVE-2021-26930: Fixed an improper error handling in blkback's grant mapping (XSA-365 bsc#1181843).

CVE-2021-26931: Fixed an issue where Linux kernel was treating grant mapping errors as bugs (XSA-362 bsc#1181753).

CVE-2021-26932: Fixed improper error handling issues in Linux grant mapping (XSA-361 bsc#1181747). by remote attackers to read or write files via directory traversal in an XCOPY request (bsc#178372).

CVE-2020-29368,CVE-2020-29374: Fixed an issue in copy-on-write implementation which could have granted unintended write access because of a race condition in a THP mapcount check (bsc#1179660, bsc#1179428).

The update package also includes non-security fixes. See advisory for details.

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 Manager Server 4.0 :

zypper in -t patch SUSE-SLE-Product-SUSE-Manager-Server-4.0-2021-737=1

SUSE Manager Retail Branch Server 4.0 :

zypper in -t patch SUSE-SLE-Product-SUSE-Manager-Retail-Branch-Server-4.0-2021-737=1

SUSE Manager Proxy 4.0 :

zypper in -t patch SUSE-SLE-Product-SUSE-Manager-Proxy-4.0-2021-737=1

SUSE Linux Enterprise Server for SAP 15-SP1 :

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP1-2021-737=1

SUSE Linux Enterprise Server 15-SP1-LTSS :

zypper in -t patch SUSE-SLE-Product-SLES-15-SP1-LTSS-2021-737=1

SUSE Linux Enterprise Server 15-SP1-BCL :

zypper in -t patch SUSE-SLE-Product-SLES-15-SP1-BCL-2021-737=1

SUSE Linux Enterprise Module for Live Patching 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP1-2021-737=1

SUSE Linux Enterprise High Performance Computing 15-SP1-LTSS :

zypper in -t patch SUSE-SLE-Product-HPC-15-SP1-LTSS-2021-737=1

SUSE Linux Enterprise High Performance Computing 15-SP1-ESPOS :

zypper in -t patch SUSE-SLE-Product-HPC-15-SP1-ESPOS-2021-737=1

SUSE Linux Enterprise High Availability 15-SP1 :

zypper in -t patch SUSE-SLE-Product-HA-15-SP1-2021-737=1

SUSE Enterprise Storage 6 :

zypper in -t patch SUSE-Storage-6-2021-737=1

SUSE CaaS Platform 4.0 :

To install this update, use the SUSE CaaS Platform 'skuba' tool. I will inform you if it detects new updates and let you then trigger updating of the complete cluster in a controlled way.

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1065600

https://bugzilla.suse.com/show_bug.cgi?id=1163617

https://bugzilla.suse.com/show_bug.cgi?id=1170442

https://bugzilla.suse.com/show_bug.cgi?id=1176855

https://bugzilla.suse.com/show_bug.cgi?id=1179082

https://bugzilla.suse.com/show_bug.cgi?id=1179428

https://bugzilla.suse.com/show_bug.cgi?id=1179660

https://bugzilla.suse.com/show_bug.cgi?id=1180058

https://bugzilla.suse.com/show_bug.cgi?id=1180262

https://bugzilla.suse.com/show_bug.cgi?id=1180964

https://bugzilla.suse.com/show_bug.cgi?id=1181671

https://bugzilla.suse.com/show_bug.cgi?id=1181747

https://bugzilla.suse.com/show_bug.cgi?id=1181753

https://bugzilla.suse.com/show_bug.cgi?id=1181843

https://bugzilla.suse.com/show_bug.cgi?id=1181854

https://bugzilla.suse.com/show_bug.cgi?id=1182047

https://bugzilla.suse.com/show_bug.cgi?id=1182130

https://bugzilla.suse.com/show_bug.cgi?id=1182140

https://bugzilla.suse.com/show_bug.cgi?id=1182175

https://www.suse.com/security/cve/CVE-2020-29368/

https://www.suse.com/security/cve/CVE-2020-29374/

https://www.suse.com/security/cve/CVE-2021-26930/

https://www.suse.com/security/cve/CVE-2021-26931/

https://www.suse.com/security/cve/CVE-2021-26932/

http://www.nessus.org/u?a3eb38ab

Plugin Details

Severity: High

ID: 147464

File Name: suse_SU-2021-0737-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 3/10/2021

Updated: 3/12/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2020-29374

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.1

Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.1

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:kernel-default, p-cpe:/a:novell:suse_linux:kernel-default-base, p-cpe:/a:novell:suse_linux:kernel-default-base-debuginfo, p-cpe:/a:novell:suse_linux:kernel-default-debuginfo, p-cpe:/a:novell:suse_linux:kernel-default-debugsource, p-cpe:/a:novell:suse_linux:kernel-default-devel, p-cpe:/a:novell:suse_linux:kernel-default-devel-debuginfo, p-cpe:/a:novell:suse_linux:kernel-default-man, p-cpe:/a:novell:suse_linux:kernel-obs-build, p-cpe:/a:novell:suse_linux:kernel-obs-build-debugsource, p-cpe:/a:novell:suse_linux:kernel-syms, p-cpe:/a:novell:suse_linux:kernel-zfcpdump-debuginfo, p-cpe:/a:novell:suse_linux:kernel-zfcpdump-debugsource, p-cpe:/a:novell:suse_linux:reiserfs-kmp-default, p-cpe:/a:novell:suse_linux:reiserfs-kmp-default-debuginfo, cpe:/o:novell:suse_linux:15

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: 3/9/2021

Vulnerability Publication Date: 11/28/2020

Reference Information

CVE: CVE-2020-29368, CVE-2020-29374, CVE-2021-26930, CVE-2021-26931, CVE-2021-26932