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

Published: 2024-06-21

Risk	Medium
Patch available	YES
Number of vulnerabilities	3
CVE-ID	CVE-2021-46955 CVE-2023-52628 CVE-2024-26852
CWE-ID	CWE-125 CWE-121 CWE-416
Exploitation vector	Network
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_39-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_154-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_157-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-SLE15-SP2_Update_38-debugsource 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-5_3_18-150200_24_163-default Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP2_Update_37-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_154-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP2_Update_40-debugsource Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU88889

Risk: Medium

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-46955

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the ovs_fragment() function in net/openvswitch/actions.c when running openvswitch on kernels built with KASAN. A remote attacker can send specially crafted IPv4 packets to the system, trigger an out-of-bounds read error and read contents of memory on the system or crash the kernel.

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_39-debugsource: before 11-150200.2.2

kernel-livepatch-5_3_18-150200_24_160-default-debuginfo: before 11-150200.2.2

kernel-livepatch-5_3_18-150200_24_154-default: before 13-150200.2.2

kernel-livepatch-5_3_18-150200_24_157-default-debuginfo: before 12-150200.2.2

kernel-livepatch-5_3_18-150200_24_157-default: before 12-150200.2.2

kernel-livepatch-5_3_18-150200_24_160-default: before 11-150200.2.2

kernel-livepatch-SLE15-SP2_Update_38-debugsource: before 12-150200.2.2

kernel-livepatch-5_3_18-150200_24_163-default-debuginfo: before 10-150200.2.2

kernel-livepatch-5_3_18-150200_24_163-default: before 10-150200.2.2

kernel-livepatch-SLE15-SP2_Update_37-debugsource: before 13-150200.2.2

kernel-livepatch-5_3_18-150200_24_154-default-debuginfo: before 13-150200.2.2

kernel-livepatch-SLE15-SP2_Update_40-debugsource: before 10-150200.2.2

CPE2.3

External links

https://www.suse.com/support/update/announcement/2024/suse-su-20242109-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Stack-based buffer overflow

EUVDB-ID: #VU87901

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-2023-52628

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the nft_exthdr_sctp_eval(), nft_exthdr_tcp_eval(), and nft_exthdr_ipv6_eval() functions. A local user can pass specially crafted data to the system, trigger a stack-based buffer overflow and execute arbitrary code with elevated privileges.