SUSE update for the Linux Kernel (Live Patch 26 for SLE 12 SP5)

1) Use-after-free

EUVDB-ID: #VU59811

Risk: Low

CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear]

CVE-ID: CVE-2021-0920

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the unix_scm_to_skb() function of af_unix.c in Linux kernel. A local user can run a specially crafted program to trigger a race condition and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel (Live Patch 26 for SLE 12 SP5) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server for SAP Applications: 15-SP1

SUSE Linux Enterprise Server: 15-SP1

SUSE Linux Enterprise Module for Live Patching: 15-SP1

SUSE Linux Enterprise High Performance Computing: 15-SP1

SUSE Linux Enterprise Live Patching: 12-SP4 - 12-SP5

kgraft-patch-4_12_14-95_83-default: before 4-2.1

kgraft-patch-4_12_14-95_80-default: before 9-2.1

kgraft-patch-4_12_14-95_74-default: before 12-2.1

kgraft-patch-4_12_14-95_71-default: before 15-2.2

kgraft-patch-4_12_14-122_98-default: before 4-2.1

kgraft-patch-4_12_14-122_91-default: before 6-2.1

kgraft-patch-4_12_14-122_88-default: before 6-2.1

kgraft-patch-4_12_14-122_83-default: before 8-2.1

kgraft-patch-4_12_14-122_80-default: before 9-2.1

kgraft-patch-4_12_14-122_77-default: before 10-2.1

kgraft-patch-4_12_14-122_74-default: before 10-2.1

kgraft-patch-4_12_14-122_71-default: before 12-2.1

kgraft-patch-4_12_14-122_66-default: before 13-2.1

kgraft-patch-4_12_14-122_63-default: before 15-2.2

kgraft-patch-4_12_14-122_103-default: before 4-2.1

kernel-livepatch-4_12_14-197_99-default: before 9-2.1

kernel-livepatch-4_12_14-197_92-default: before 11-2.1

kernel-livepatch-4_12_14-197_89-default: before 12-2.1

kernel-livepatch-4_12_14-197_86-default: before 15-2.2

kernel-livepatch-4_12_14-197_102-default: before 4-2.1

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications:15-SP1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:15-SP1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_module_for_live_patching:15-SP1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_high_performance_computing:15-SP1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_live_patching:12-SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_live_patching:12-SP5:*:*:*:*:*:*:*
• cpe:2.3:a:suse:kgraft-patch-4_12_14-95_83-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kgraft-patch-4_12_14-95_80-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kgraft-patch-4_12_14-95_74-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kgraft-patch-4_12_14-95_71-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kgraft-patch-4_12_14-122_98-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kgraft-patch-4_12_14-122_91-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kgraft-patch-4_12_14-122_88-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kgraft-patch-4_12_14-122_83-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kgraft-patch-4_12_14-122_80-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kgraft-patch-4_12_14-122_77-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kgraft-patch-4_12_14-122_74-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kgraft-patch-4_12_14-122_71-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kgraft-patch-4_12_14-122_66-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kgraft-patch-4_12_14-122_63-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kgraft-patch-4_12_14-122_103-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kernel-livepatch-4_12_14-197_99-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kernel-livepatch-4_12_14-197_92-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kernel-livepatch-4_12_14-197_89-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kernel-livepatch-4_12_14-197_86-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kernel-livepatch-4_12_14-197_102-default:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20220647-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.