SUSE update for the Linux Kernel (Live Patch 42 for SLE 15 SP3)

Published: 2024-04-13 | Updated: 2024-05-31

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-1829 CVE-2023-6531
CWE-ID	CWE-416 CWE-362
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #1 is available.
Vulnerable software	SUSE Linux Enterprise Live Patching Operating systems & Components / Operating system SUSE Linux Enterprise Server for SAP Applications 15 Operating systems & Components / Operating system SUSE Linux Enterprise Server 15 Operating systems & Components / Operating system SUSE Linux Enterprise High Performance Computing 15 Operating systems & Components / Operating system SUSE Linux Enterprise Micro Operating systems & Components / Operating system openSUSE Leap Operating systems & Components / Operating system kernel-livepatch-5_3_18-150300_59_153-preempt Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150300_59_153-preempt-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150300_59_153-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP3_Update_42-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150300_59_153-default Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_183-default Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP2_Update_46-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_183-default-debuginfo Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU75448

Risk: Low

CVSSv4.0: 7.1 [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:P/U:Clear]

CVE-ID: CVE-2023-1829

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

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 tcindex_delete() function. A local user can trigger a use-after-free error and execute arbitrary code with root privileges.

Mitigation

Update the affected package the Linux Kernel (Live Patch 42 for SLE 15 SP3) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Live Patching: 15-SP2 - 15-SP3

SUSE Linux Enterprise Server for SAP Applications 15: SP2 - SP3

SUSE Linux Enterprise Server 15: SP2 - SP3

SUSE Linux Enterprise High Performance Computing 15: SP2 - SP3

SUSE Linux Enterprise Micro: 5.1 - 5.2

openSUSE Leap: 15.3

kernel-livepatch-5_3_18-150300_59_153-preempt: before 2-150300.7.6.1

kernel-livepatch-5_3_18-150300_59_153-preempt-debuginfo: before 2-150300.7.6.1

kernel-livepatch-5_3_18-150300_59_153-default-debuginfo: before 2-150300.7.6.1

kernel-livepatch-SLE15-SP3_Update_42-debugsource: before 2-150300.7.6.1

kernel-livepatch-5_3_18-150300_59_153-default: before 2-150300.7.6.1

kernel-livepatch-5_3_18-150200_24_183-default: before 2-150200.5.6.1

kernel-livepatch-SLE15-SP2_Update_46-debugsource: before 2-150200.5.6.1

kernel-livepatch-5_3_18-150200_24_183-default-debuginfo: before 2-150200.5.6.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2024/suse-su-20241276-1/

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. However, proof of concept for this vulnerability is available.

2) Race condition

EUVDB-ID: #VU85022

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-2023-6531

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

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

The vulnerability exists due to a race condition when the unix garbage collector's deletion of a SKB races with unix_stream_read_generic() on the socket that the SKB is queued on. A local user can exploit the race and escalate privileges on the system.