SUSE update for the Linux Kernel (Live Patch 23 for SLE 15 SP1)

Published: 2021-12-14

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-0941 CVE-2021-20322
CWE-ID	CWE-125 CWE-330
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	SUSE Linux Enterprise Module for Live Patching Operating systems & Components / Operating system SUSE Linux Enterprise Live Patching Operating systems & Components / Operating system kgraft-patch-4_12_14-95_80-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-95_77-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-95_74-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-95_71-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-95_68-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-122_91-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-122_88-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-122_83-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-122_80-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-122_77-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-122_74-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-122_71-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-122_66-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-122_63-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-122_60-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-122_57-default Operating systems & Components / Operating system package or component kgraft-patch-4_12_14-122_54-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_75-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_75-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_72-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_72-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_69-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_69-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_66-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_66-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-197_99-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-197_92-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-197_89-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-197_86-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-197_83-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-197_78-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-197_75-default Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU64702

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-0941

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists in __bpf_skb_max_len() function in net/core/filter.c in the Linux kernel. A local user with special privilege can gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information.

Mitigation

Update the affected package the Linux Kernel (Live Patch 23 for SLE 15 SP1) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP1 - 15-SP4

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

kgraft-patch-4_12_14-95_80-default: before 6-2.1

kgraft-patch-4_12_14-95_77-default: before 8-2.1

kgraft-patch-4_12_14-95_74-default: before 9-2.1

kgraft-patch-4_12_14-95_71-default: before 12-2.2

kgraft-patch-4_12_14-95_68-default: before 13-2.2

kgraft-patch-4_12_14-122_91-default: before 3-2.1

kgraft-patch-4_12_14-122_88-default: before 3-2.1

kgraft-patch-4_12_14-122_83-default: before 5-2.1

kgraft-patch-4_12_14-122_80-default: before 6-2.1

kgraft-patch-4_12_14-122_77-default: before 7-2.1

kgraft-patch-4_12_14-122_74-default: before 7-2.1

kgraft-patch-4_12_14-122_71-default: before 9-2.1

kgraft-patch-4_12_14-122_66-default: before 10-2.1

kgraft-patch-4_12_14-122_63-default: before 12-2.2

kgraft-patch-4_12_14-122_60-default: before 13-2.2

kgraft-patch-4_12_14-122_57-default: before 14-2.2

kgraft-patch-4_12_14-122_54-default: before 14-2.2

kernel-livepatch-4_12_14-150_75-default-debuginfo: before 6-2.1

kernel-livepatch-4_12_14-150_75-default: before 6-2.1

kernel-livepatch-4_12_14-150_72-default-debuginfo: before 9-2.1

kernel-livepatch-4_12_14-150_72-default: before 9-2.1

kernel-livepatch-4_12_14-150_69-default-debuginfo: before 12-2.2

kernel-livepatch-4_12_14-150_69-default: before 12-2.2

kernel-livepatch-4_12_14-150_66-default-debuginfo: before 13-2.2

kernel-livepatch-4_12_14-150_66-default: before 13-2.2

kernel-livepatch-4_12_14-197_99-default: before 6-2.1

kernel-livepatch-4_12_14-197_92-default: before 8-2.1

kernel-livepatch-4_12_14-197_89-default: before 9-2.1

kernel-livepatch-4_12_14-197_86-default: before 12-2.2

kernel-livepatch-4_12_14-197_83-default: before 13-2.2

kernel-livepatch-4_12_14-197_78-default: before 14-2.2

kernel-livepatch-4_12_14-197_75-default: before 14-2.2

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20214038-1/

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?

No. We are not aware of malware exploiting this vulnerability.

2) Use of insufficiently random values

EUVDB-ID: #VU63839

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-20322

CWE-ID: CWE-330 - Use of Insufficiently Random Values