SUSE update for the Linux Kernel (Live Patch 29 for SLE 15 SP2)

Published: 2023-02-02

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2022-2602 CVE-2022-3424
CWE-ID	CWE-416
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #1 is available.
Vulnerable software Subscribe	SUSE Linux Enterprise Server for SAP Applications Operating systems & Components / Operating system SUSE Linux Enterprise Server Operating systems & Components / Operating system SUSE Linux Enterprise Module for Live Patching Operating systems & Components / Operating system SUSE Linux Enterprise High Performance Computing Operating systems & Components / Operating system kernel-livepatch-SLE15-SP2_Update_30-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP2_Update_29-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP2_Update_27-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_129-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_129-default Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_126-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_126-default Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_115-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_115-default 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: #VU68423

Risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2022-2602

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 caused by an io_uring request, which is being processed on a registered file. The Unix GC runs and frees the io_uring file descriptor and all the registered file descriptors in a specific order that may allow a local user to win a race and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel (Live Patch 29 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server for SAP Applications: 15-SP2

SUSE Linux Enterprise Server: 15-SP2

SUSE Linux Enterprise Module for Live Patching: 15-SP2

SUSE Linux Enterprise High Performance Computing: 15-SP2

kernel-livepatch-SLE15-SP2_Update_30-debugsource: before 4-150200.2.1

kernel-livepatch-SLE15-SP2_Update_29-debugsource: before 7-150200.2.1

kernel-livepatch-SLE15-SP2_Update_27-debugsource: before 10-150200.2.1

kernel-livepatch-5_3_18-150200_24_129-default-debuginfo: before 4-150200.2.1

kernel-livepatch-5_3_18-150200_24_129-default: before 4-150200.2.1

kernel-livepatch-5_3_18-150200_24_126-default-debuginfo: before 7-150200.2.1

kernel-livepatch-5_3_18-150200_24_126-default: before 7-150200.2.1

kernel-livepatch-5_3_18-150200_24_115-default-debuginfo: before 10-150200.2.1

kernel-livepatch-5_3_18-150200_24_115-default: before 10-150200.2.1

CPE2.3

External links

http://www.suse.com/support/update/announcement/2023/suse-su-20230229-1/

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) Use-after-free

EUVDB-ID: #VU69759

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-2022-3424

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 gru_set_context_option(), gru_fault() and gru_handle_user_call_os() functions in Linux kernel. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.