SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2020:3718-1)

medium Nessus Plugin ID 143633
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

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

Description

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

The following security bugs were fixed :

CVE-2020-15436: Fixed a use after free vulnerability in fs/block_dev.c which could have allowed local users to gain privileges or cause a denial of service (bsc#1179141).

CVE-2020-15437: Fixed a NULL pointer dereference which could have allowed local users to cause a denial of service(bsc#1179140).

CVE-2020-25669: Fixed a use-after-free read in sunkbd_reinit() (bsc#1178182).

CVE-2020-27777: Restrict RTAS requests from userspace (bsc#1179107).

CVE-2020-28915: Fixed a buffer over-read in the fbcon code which could have been used by local attackers to read kernel memory (bsc#1178886).

CVE-2020-28974: Fixed a slab-out-of-bounds read in fbcon which could have been used by local attackers to read privileged information or potentially crash the kernel (bsc#1178589).

CVE-2020-29371: Fixed uninitialized memory leaks to userspace (bsc#1179429).

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 Linux Enterprise Workstation Extension 15-SP1 :

zypper in -t patch SUSE-SLE-Product-WE-15-SP1-2020-3718=1

SUSE Linux Enterprise Module for Live Patching 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP1-2020-3718=1

SUSE Linux Enterprise Module for Legacy Software 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Legacy-15-SP1-2020-3718=1

SUSE Linux Enterprise Module for Development Tools 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Development-Tools-15-SP1-2020-3718=1

SUSE Linux Enterprise Module for Basesystem 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP1-2020-3718=1

SUSE Linux Enterprise High Availability 15-SP1 :

zypper in -t patch SUSE-SLE-Product-HA-15-SP1-2020-3718=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1050549

https://bugzilla.suse.com/show_bug.cgi?id=1067665

https://bugzilla.suse.com/show_bug.cgi?id=1111666

https://bugzilla.suse.com/show_bug.cgi?id=1112178

https://bugzilla.suse.com/show_bug.cgi?id=1158775

https://bugzilla.suse.com/show_bug.cgi?id=1170139

https://bugzilla.suse.com/show_bug.cgi?id=1170630

https://bugzilla.suse.com/show_bug.cgi?id=1172542

https://bugzilla.suse.com/show_bug.cgi?id=1174726

https://bugzilla.suse.com/show_bug.cgi?id=1175916

https://bugzilla.suse.com/show_bug.cgi?id=1176109

https://bugzilla.suse.com/show_bug.cgi?id=1177304

https://bugzilla.suse.com/show_bug.cgi?id=1177397

https://bugzilla.suse.com/show_bug.cgi?id=1177805

https://bugzilla.suse.com/show_bug.cgi?id=1177808

https://bugzilla.suse.com/show_bug.cgi?id=1177819

https://bugzilla.suse.com/show_bug.cgi?id=1177820

https://bugzilla.suse.com/show_bug.cgi?id=1178182

https://bugzilla.suse.com/show_bug.cgi?id=1178589

https://bugzilla.suse.com/show_bug.cgi?id=1178635

https://bugzilla.suse.com/show_bug.cgi?id=1178669

https://bugzilla.suse.com/show_bug.cgi?id=1178838

https://bugzilla.suse.com/show_bug.cgi?id=1178853

https://bugzilla.suse.com/show_bug.cgi?id=1178854

https://bugzilla.suse.com/show_bug.cgi?id=1178878

https://bugzilla.suse.com/show_bug.cgi?id=1178886

https://bugzilla.suse.com/show_bug.cgi?id=1178897

https://bugzilla.suse.com/show_bug.cgi?id=1178940

https://bugzilla.suse.com/show_bug.cgi?id=1178962

https://bugzilla.suse.com/show_bug.cgi?id=1179107

https://bugzilla.suse.com/show_bug.cgi?id=1179140

https://bugzilla.suse.com/show_bug.cgi?id=1179141

https://bugzilla.suse.com/show_bug.cgi?id=1179211

https://bugzilla.suse.com/show_bug.cgi?id=1179213

https://bugzilla.suse.com/show_bug.cgi?id=1179259

https://bugzilla.suse.com/show_bug.cgi?id=1179403

https://bugzilla.suse.com/show_bug.cgi?id=1179406

https://bugzilla.suse.com/show_bug.cgi?id=1179418

https://bugzilla.suse.com/show_bug.cgi?id=1179421

https://bugzilla.suse.com/show_bug.cgi?id=1179424

https://bugzilla.suse.com/show_bug.cgi?id=1179426

https://bugzilla.suse.com/show_bug.cgi?id=1179427

https://bugzilla.suse.com/show_bug.cgi?id=1179429

https://www.suse.com/security/cve/CVE-2020-15436/

https://www.suse.com/security/cve/CVE-2020-15437/

https://www.suse.com/security/cve/CVE-2020-25669/

https://www.suse.com/security/cve/CVE-2020-27777/

https://www.suse.com/security/cve/CVE-2020-28915/

https://www.suse.com/security/cve/CVE-2020-28974/

https://www.suse.com/security/cve/CVE-2020-29371/

http://www.nessus.org/u?8809a5f5

Plugin Details

Severity: Medium

ID: 143633

File Name: suse_SU-2020-3718-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 12/9/2020

Updated: 1/13/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2020-27777

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

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

CVSS v3

Risk Factor: Medium

Base Score: 6.7

Temporal Score: 5.8

Vector: CVSS:3.0/AV:L/AC:L/PR:H/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: 12/9/2020

Vulnerability Publication Date: 11/18/2020

Reference Information

CVE: CVE-2020-15436, CVE-2020-15437, CVE-2020-25669, CVE-2020-27777, CVE-2020-28915, CVE-2020-28974, CVE-2020-29371