SUSE update for the Linux Kernel (Live Patch 3 for SLE 15 SP3)

Published: 2021-11-17

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-34866 CVE-2021-41864
CWE-ID	CWE-843 CWE-787
Exploitation vector	Local
Public exploit	N/A
Vulnerable software	SUSE Linux Enterprise Module for Live Patching Operating systems & Components / Operating system kernel-livepatch-SLE15-SP3_Update_6-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP3_Update_3-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-59_24-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-59_24-default Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-59_13-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-59_13-default Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Type Confusion

EUVDB-ID: #VU57372

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-34866

CWE-ID: CWE-843 - Type confusion

Exploit availability: No

Description

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

The vulnerability exists due to a type confusion error within the handling of eBPF programs. A local user can run a specially crafted program on the system to trigger a type confusion and execute arbitrary code with kernel privileges.

Mitigation

Update the affected package the Linux Kernel (Live Patch 3 for SLE 15 SP3) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP3

kernel-livepatch-SLE15-SP3_Update_6-debugsource: before 2-2.2

kernel-livepatch-SLE15-SP3_Update_3-debugsource: before 6-2.2

kernel-livepatch-5_3_18-59_24-default-debuginfo: before 2-2.2

kernel-livepatch-5_3_18-59_24-default: before 2-2.2

kernel-livepatch-5_3_18-59_13-default-debuginfo: before 6-2.2

kernel-livepatch-5_3_18-59_13-default: before 6-2.2

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20213718-1/

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) Out-of-bounds write

EUVDB-ID: #VU63855