SUSE SLES15 Security Update : kernel (SUSE-SU-2020:2106-1)

critical Nessus Plugin ID 139309
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 GA LTSS kernel was updated to receive various security and bugfixes.

The following security bugs were fixed :

CVE-2020-0305: In cdev_get of char_dev.c, there is a possible use-after-free due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation (bnc#1174462).

CVE-2019-20908: An issue was discovered in drivers/firmware/efi/efi.c where incorrect access permissions for the efivar_ssdt ACPI variable could be used by attackers to bypass lockdown or secure boot restrictions, aka CID-1957a85b0032 (bnc#1173567).

CVE-2020-15780: An issue was discovered in drivers/acpi/acpi_configfs.c where injection of malicious ACPI tables via configfs could be used by attackers to bypass lockdown and secure boot restrictions, aka CID-75b0cea7bf30 (bnc#1173573).

CVE-2020-15393: usbtest_disconnect in drivers/usb/misc/usbtest.c had a memory leak, aka CID-28ebeb8db770 (bnc#1173514).

CVE-2020-12771: btree_gc_coalesce in drivers/md/bcache/btree.c has a deadlock if a coalescing operation fails (bnc#1171732).

CVE-2019-16746: An issue was discovered in net/wireless/nl80211.c which did not check the length of variable elements in a beacon head, leading to a buffer overflow (bnc#1152107 1173659).

CVE-2020-12888: The VFIO PCI driver mishandled attempts to access disabled memory space (bnc#1171868).

CVE-2020-10769: A buffer over-read flaw was found in crypto_authenc_extractkeys in crypto/authenc.c in the IPsec Cryptographic algorithm's module, authenc. When a payload longer than 4 bytes, and is not following 4-byte alignment boundary guidelines, it causes a buffer over-read threat, leading to a system crash. This flaw allowed a local attacker with user privileges to cause a denial of service (bnc#1173265).

CVE-2020-10773: A kernel stack information leak on s390/s390x was fixed (bnc#1172999).

CVE-2020-14416: A race condition in tty->disc_data handling in the slip and slcan line discipline could lead to a use-after-free, aka CID-0ace17d56824. This affects drivers/net/slip/slip.c and drivers/net/can/slcan.c (bnc#1162002).

CVE-2020-10768: Indirect branch speculation could have been enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command. (bnc#1172783).

CVE-2020-10766: Fixed Rogue cross-process SSBD shutdown, where a Linux scheduler logical bug allows an attacker to turn off the SSBD protection. (bnc#1172781).

CVE-2020-10767: Indirect Branch Prediction Barrier was force-disabled when STIBP is unavailable or enhanced IBRS is available.
(bnc#1172782).

CVE-2020-13974: drivers/tty/vt/keyboard.c had an integer overflow if k_ascii is called several times in a row, aka CID-b86dab054059 (bnc#1172775).

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 Server for SAP 15 :

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-2020-2106=1

SUSE Linux Enterprise Server 15-LTSS :

zypper in -t patch SUSE-SLE-Product-SLES-15-2020-2106=1

SUSE Linux Enterprise Module for Live Patching 15 :

zypper in -t patch SUSE-SLE-Module-Live-Patching-15-2020-2106=1

SUSE Linux Enterprise High Performance Computing 15-LTSS :

zypper in -t patch SUSE-SLE-Product-HPC-15-2020-2106=1

SUSE Linux Enterprise High Performance Computing 15-ESPOS :

zypper in -t patch SUSE-SLE-Product-HPC-15-2020-2106=1

SUSE Linux Enterprise High Availability 15 :

zypper in -t patch SUSE-SLE-Product-HA-15-2020-2106=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1051510

https://bugzilla.suse.com/show_bug.cgi?id=1065729

https://bugzilla.suse.com/show_bug.cgi?id=1071995

https://bugzilla.suse.com/show_bug.cgi?id=1104967

https://bugzilla.suse.com/show_bug.cgi?id=1152107

https://bugzilla.suse.com/show_bug.cgi?id=1158755

https://bugzilla.suse.com/show_bug.cgi?id=1162002

https://bugzilla.suse.com/show_bug.cgi?id=1170011

https://bugzilla.suse.com/show_bug.cgi?id=1171078

https://bugzilla.suse.com/show_bug.cgi?id=1171673

https://bugzilla.suse.com/show_bug.cgi?id=1171732

https://bugzilla.suse.com/show_bug.cgi?id=1171868

https://bugzilla.suse.com/show_bug.cgi?id=1172257

https://bugzilla.suse.com/show_bug.cgi?id=1172775

https://bugzilla.suse.com/show_bug.cgi?id=1172781

https://bugzilla.suse.com/show_bug.cgi?id=1172782

https://bugzilla.suse.com/show_bug.cgi?id=1172783

https://bugzilla.suse.com/show_bug.cgi?id=1172999

https://bugzilla.suse.com/show_bug.cgi?id=1173265

https://bugzilla.suse.com/show_bug.cgi?id=1173280

https://bugzilla.suse.com/show_bug.cgi?id=1173514

https://bugzilla.suse.com/show_bug.cgi?id=1173567

https://bugzilla.suse.com/show_bug.cgi?id=1173573

https://bugzilla.suse.com/show_bug.cgi?id=1173659

https://bugzilla.suse.com/show_bug.cgi?id=1173999

https://bugzilla.suse.com/show_bug.cgi?id=1174000

https://bugzilla.suse.com/show_bug.cgi?id=1174115

https://bugzilla.suse.com/show_bug.cgi?id=1174462

https://bugzilla.suse.com/show_bug.cgi?id=1174543

https://www.suse.com/security/cve/CVE-2019-16746/

https://www.suse.com/security/cve/CVE-2019-20908/

https://www.suse.com/security/cve/CVE-2020-0305/

https://www.suse.com/security/cve/CVE-2020-10766/

https://www.suse.com/security/cve/CVE-2020-10767/

https://www.suse.com/security/cve/CVE-2020-10768/

https://www.suse.com/security/cve/CVE-2020-10769/

https://www.suse.com/security/cve/CVE-2020-10773/

https://www.suse.com/security/cve/CVE-2020-12771/

https://www.suse.com/security/cve/CVE-2020-12888/

https://www.suse.com/security/cve/CVE-2020-13974/

https://www.suse.com/security/cve/CVE-2020-14416/

https://www.suse.com/security/cve/CVE-2020-15393/

https://www.suse.com/security/cve/CVE-2020-15780/

http://www.nessus.org/u?ef3c057c

Plugin Details

Severity: Critical

ID: 139309

File Name: suse_SU-2020-2106-1.nasl

Version: 1.4

Type: local

Agent: unix

Published: 8/4/2020

Updated: 1/13/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2019-16746

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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-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-vanilla-base, p-cpe:/a:novell:suse_linux:kernel-vanilla-base-debuginfo, p-cpe:/a:novell:suse_linux:kernel-vanilla-debuginfo, p-cpe:/a:novell:suse_linux:kernel-vanilla-debugsource, 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: 8/3/2020

Vulnerability Publication Date: 9/24/2019

Reference Information

CVE: CVE-2019-16746, CVE-2019-20908, CVE-2020-0305, CVE-2020-10766, CVE-2020-10767, CVE-2020-10768, CVE-2020-10769, CVE-2020-10773, CVE-2020-12771, CVE-2020-12888, CVE-2020-13974, CVE-2020-14416, CVE-2020-15393, CVE-2020-15780