SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2020:3748-1)

medium Nessus Plugin ID 144101

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Synopsis

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

Description

The SUSE Linux Enterprise 15 SP2 kernel was updated to 3.12.31 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-2020-25668: Fixed a concurrency use-after-free in con_font_op (bsc#1178123).

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

CVE-2020-25704: Fixed a leak in perf_event_parse_addr_filter() (bsc#1178393).

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).

CVE-2020-25705: Fixed an issue which could have allowed to quickly scan open UDP ports. This flaw allowed an off-path remote user to effectively bypassing source port UDP randomization (bsc#1175721).

CVE-2020-28941: Fixed an issue where local attackers on systems with the speakup driver could cause a local denial of service attack (bsc#1178740).

CVE-2020-4788: Fixed an issue with IBM Power9 processors could have allowed a local user to obtain sensitive information from the data in the L1 cache under extenuating circumstances (bsc#1177666).

CVE-2020-29369: Fixed a race condition between certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an munmap call, aka CID-246c320a8cfe (bnc#1173504 1179432).

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-SP2 :

zypper in -t patch SUSE-SLE-Product-WE-15-SP2-2020-3748=1

SUSE Linux Enterprise Module for Live Patching 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP2-2020-3748=1

SUSE Linux Enterprise Module for Legacy Software 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Legacy-15-SP2-2020-3748=1

SUSE Linux Enterprise Module for Development Tools 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Development-Tools-15-SP2-2020-3748=1

SUSE Linux Enterprise Module for Basesystem 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP2-2020-3748=1

SUSE Linux Enterprise High Availability 15-SP2 :

zypper in -t patch SUSE-SLE-Product-HA-15-SP2-2020-3748=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1149032

https://bugzilla.suse.com/show_bug.cgi?id=1152489

https://bugzilla.suse.com/show_bug.cgi?id=1153274

https://bugzilla.suse.com/show_bug.cgi?id=1154353

https://bugzilla.suse.com/show_bug.cgi?id=1155518

https://bugzilla.suse.com/show_bug.cgi?id=1160634

https://bugzilla.suse.com/show_bug.cgi?id=1166146

https://bugzilla.suse.com/show_bug.cgi?id=1166166

https://bugzilla.suse.com/show_bug.cgi?id=1167030

https://bugzilla.suse.com/show_bug.cgi?id=1167773

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

https://bugzilla.suse.com/show_bug.cgi?id=1171073

https://bugzilla.suse.com/show_bug.cgi?id=1171558

https://bugzilla.suse.com/show_bug.cgi?id=1172873

https://bugzilla.suse.com/show_bug.cgi?id=1173504

https://bugzilla.suse.com/show_bug.cgi?id=1174852

https://bugzilla.suse.com/show_bug.cgi?id=1175306

https://bugzilla.suse.com/show_bug.cgi?id=1175918

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

https://bugzilla.suse.com/show_bug.cgi?id=1176180

https://bugzilla.suse.com/show_bug.cgi?id=1176200

https://bugzilla.suse.com/show_bug.cgi?id=1176481

https://bugzilla.suse.com/show_bug.cgi?id=1176586

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

https://bugzilla.suse.com/show_bug.cgi?id=1176983

https://bugzilla.suse.com/show_bug.cgi?id=1177066

https://bugzilla.suse.com/show_bug.cgi?id=1177070

https://bugzilla.suse.com/show_bug.cgi?id=1177353

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

https://bugzilla.suse.com/show_bug.cgi?id=1177577

https://bugzilla.suse.com/show_bug.cgi?id=1177666

https://bugzilla.suse.com/show_bug.cgi?id=1177703

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

https://bugzilla.suse.com/show_bug.cgi?id=1178123

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

https://bugzilla.suse.com/show_bug.cgi?id=1178227

https://bugzilla.suse.com/show_bug.cgi?id=1178286

https://bugzilla.suse.com/show_bug.cgi?id=1178304

https://bugzilla.suse.com/show_bug.cgi?id=1178330

https://bugzilla.suse.com/show_bug.cgi?id=1178393

https://bugzilla.suse.com/show_bug.cgi?id=1178401

https://bugzilla.suse.com/show_bug.cgi?id=1178426

https://bugzilla.suse.com/show_bug.cgi?id=1178461

https://bugzilla.suse.com/show_bug.cgi?id=1178579

https://bugzilla.suse.com/show_bug.cgi?id=1178581

https://bugzilla.suse.com/show_bug.cgi?id=1178584

https://bugzilla.suse.com/show_bug.cgi?id=1178585

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=1178653

https://bugzilla.suse.com/show_bug.cgi?id=1178659

https://bugzilla.suse.com/show_bug.cgi?id=1178661

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

https://bugzilla.suse.com/show_bug.cgi?id=1178686

https://bugzilla.suse.com/show_bug.cgi?id=1178740

https://bugzilla.suse.com/show_bug.cgi?id=1178755

https://bugzilla.suse.com/show_bug.cgi?id=1178762

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=1178886

https://bugzilla.suse.com/show_bug.cgi?id=1179001

https://bugzilla.suse.com/show_bug.cgi?id=1179012

https://bugzilla.suse.com/show_bug.cgi?id=1179014

https://bugzilla.suse.com/show_bug.cgi?id=1179015

https://bugzilla.suse.com/show_bug.cgi?id=1179045

https://bugzilla.suse.com/show_bug.cgi?id=1179076

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

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=1179160

https://bugzilla.suse.com/show_bug.cgi?id=1179201

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

https://bugzilla.suse.com/show_bug.cgi?id=1179217

https://bugzilla.suse.com/show_bug.cgi?id=1179225

https://bugzilla.suse.com/show_bug.cgi?id=1179419

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

https://bugzilla.suse.com/show_bug.cgi?id=1179425

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://bugzilla.suse.com/show_bug.cgi?id=1179432

https://bugzilla.suse.com/show_bug.cgi?id=1179442

https://bugzilla.suse.com/show_bug.cgi?id=1179550

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-2020-25668/

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

https://www.suse.com/security/cve/CVE-2020-25704/

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-2020-28941/

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

https://www.suse.com/security/cve/CVE-2020-29369/

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

https://www.suse.com/security/cve/CVE-2020-4788/

http://www.nessus.org/u?1ada2721

Plugin Details

Severity: Medium

ID: 144101

File Name: suse_SU-2020-3748-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 12/11/2020

Updated: 4/16/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2020-27777

VPR

Risk Factor: High

Score: 8.5

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-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-obs-build, p-cpe:/a:novell:suse_linux:kernel-obs-build-debugsource, p-cpe:/a:novell:suse_linux:kernel-preempt, p-cpe:/a:novell:suse_linux:kernel-preempt-debuginfo, p-cpe:/a:novell:suse_linux:kernel-preempt-debugsource, p-cpe:/a:novell:suse_linux:kernel-preempt-devel, p-cpe:/a:novell:suse_linux:kernel-preempt-devel-debuginfo, p-cpe:/a:novell:suse_linux:kernel-syms, 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: 12/10/2020

Vulnerability Publication Date: 11/17/2020

Reference Information

CVE: CVE-2020-15436, CVE-2020-15437, CVE-2020-25668, CVE-2020-25669, CVE-2020-25704, CVE-2020-25705, CVE-2020-27777, CVE-2020-28915, CVE-2020-28941, CVE-2020-28974, CVE-2020-29369, CVE-2020-29371, CVE-2020-4788