SUSE update for the Linux Kernel (Live Patch 40 for SLE 15 SP2)

Published: 2023-12-13

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-2163 CVE-2023-4622
CWE-ID	CWE-787 CWE-416
Exploitation vector	Local
Public exploit	N/A
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 kernel-livepatch-SLE15-SP2_Update_38-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_157-default Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP2_Update_35-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_160-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_148-default Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_157-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_163-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP2_Update_39-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP2_Update_40-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_163-default Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_160-default Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_148-default-debuginfo Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU79673

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-2023-2163

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in BPF verifier caused by improper marking of registers for precision tracking in certain situations. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel (Live Patch 40 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Live Patching: 15-SP2

SUSE Linux Enterprise Server for SAP Applications 15: SP2

SUSE Linux Enterprise Server 15: SP2

SUSE Linux Enterprise High Performance Computing 15: SP2

kernel-livepatch-SLE15-SP2_Update_38-debugsource: before 5-150200.2.1

kernel-livepatch-5_3_18-150200_24_157-default: before 5-150200.2.1

kernel-livepatch-SLE15-SP2_Update_35-debugsource: before 8-150200.2.1

kernel-livepatch-5_3_18-150200_24_160-default-debuginfo: before 4-150200.2.1

kernel-livepatch-5_3_18-150200_24_148-default: before 8-150200.2.1

kernel-livepatch-5_3_18-150200_24_157-default-debuginfo: before 5-150200.2.1

kernel-livepatch-5_3_18-150200_24_163-default-debuginfo: before 3-150200.2.1

kernel-livepatch-SLE15-SP2_Update_39-debugsource: before 4-150200.2.1

kernel-livepatch-SLE15-SP2_Update_40-debugsource: before 3-150200.2.1

kernel-livepatch-5_3_18-150200_24_163-default: before 3-150200.2.1

kernel-livepatch-5_3_18-150200_24_160-default: before 4-150200.2.1

kernel-livepatch-5_3_18-150200_24_148-default-debuginfo: before 8-150200.2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20234802-1/

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-after-free

EUVDB-ID: #VU80583

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-2023-4622

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_stream_sendpage() function in af_unix component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.