SUSE update for the Linux Kernel RT (Live Patch 5 for SLE 15 SP4)

1) Use-after-free

EUVDB-ID: #VU74770

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-2023-1652

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 nfsd4_ssc_setup_dul() function in fs/nfsd/nfs4proc.c. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel RT (Live Patch 5 for SLE 15 SP4) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro: 5.3 - 5.4

SUSE Linux Enterprise Live Patching: 15-SP4

SUSE Linux Enterprise Server for SAP Applications 15: SP4

SUSE Linux Enterprise Server 15: SP4

SUSE Linux Enterprise Real Time 15: SP4

SUSE Linux Enterprise High Performance Computing 15: SP4

kernel-livepatch-SLE15-SP4-RT_Update_5-debugsource: before 2-150400.2.2

kernel-livepatch-5_14_21-150400_15_18-rt: before 2-150400.2.2

kernel-livepatch-5_14_21-150400_15_18-rt-debuginfo: before 2-150400.2.2

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_micro:5.3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_micro:5.4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_live_patching:15-SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications_15:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_15:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_real_time_15:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_high_performance_computing_15:SP4:*:*:*:*:*:*:*
• cpe:2.3:a:suse:kernel-livepatch-sle15-sp4-rt_update_5-debugsource:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kernel-livepatch-5_14_21-150400_15_18-rt:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:kernel-livepatch-5_14_21-150400_15_18-rt-debuginfo:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20231978-1/

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.