SUSE update for the Linux Kernel RT (Live Patch 0 for SLE 15 SP5)

Published: 2023-09-19

Risk	Medium
Patch available	YES
Number of vulnerabilities	7
CVE-ID	CVE-2023-1077 CVE-2023-2156 CVE-2023-2176 CVE-2023-3090 CVE-2023-32233 CVE-2023-35001 CVE-2023-3567
CWE-ID	CWE-843 CWE-617 CWE-125 CWE-787 CWE-416
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #5 is available. Public exploit code for vulnerability #6 is available.
Vulnerable software	SUSE Linux Enterprise Micro Operating systems & Components / Operating system 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 Real Time 15 Operating systems & Components / Operating system SUSE Linux Enterprise High Performance Computing 15 Operating systems & Components / Operating system openSUSE Leap Operating systems & Components / Operating system kernel-livepatch-5_14_21-150500_11-rt Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP5-RT_Update_0-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-5_14_21-150500_11-rt-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-5_14_21-150400_15_11-rt Operating systems & Components / Operating system package or component kernel-livepatch-5_14_21-150400_15_11-rt-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP4-RT_Update_1-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-5_14_21-150400_15_8-rt-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-5_14_21-150400_15_8-rt Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP4-RT_Update_2-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP4-RT_Update_3-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-5_14_21-150400_15_5-rt Operating systems & Components / Operating system package or component kernel-livepatch-5_14_21-150400_15_5-rt-debuginfo Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 7 vulnerabilities.

1) Type Confusion

EUVDB-ID: #VU72699

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-2023-1077

CWE-ID: CWE-843 - Type confusion

Exploit availability: No

Description

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

The vulnerability exists due to a type confusion error within the pick_next_rt_entity() function pick_next_rt_entity(). A local user can trigger a type confusion error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel RT (Live Patch 0 for SLE 15 SP5) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro: 5.3 - 5.5

SUSE Linux Enterprise Live Patching: 15-SP4 - 15-SP5

SUSE Linux Enterprise Server for SAP Applications 15: SP4 - SP5

SUSE Linux Enterprise Server 15: SP4 - SP5

SUSE Linux Enterprise Real Time 15: SP4 - SP5

SUSE Linux Enterprise High Performance Computing 15: SP4 - SP5

openSUSE Leap: 15.5

kernel-livepatch-5_14_21-150500_11-rt: before 3-150500.6.2

kernel-livepatch-SLE15-SP5-RT_Update_0-debugsource: before 3-150500.6.2

kernel-livepatch-5_14_21-150500_11-rt-debuginfo: before 3-150500.6.2

kernel-livepatch-5_14_21-150400_15_11-rt: before 7-150400.2.2

kernel-livepatch-5_14_21-150400_15_11-rt-debuginfo: before 7-150400.2.2

kernel-livepatch-SLE15-SP4-RT_Update_1-debugsource: before 9-150400.2.2

kernel-livepatch-5_14_21-150400_15_8-rt-debuginfo: before 8-150400.2.2

kernel-livepatch-5_14_21-150400_15_8-rt: before 8-150400.2.2

kernel-livepatch-SLE15-SP4-RT_Update_2-debugsource: before 8-150400.2.2

kernel-livepatch-SLE15-SP4-RT_Update_3-debugsource: before 7-150400.2.2

kernel-livepatch-5_14_21-150400_15_5-rt: before 9-150400.2.2

kernel-livepatch-5_14_21-150400_15_5-rt-debuginfo: before 9-150400.2.2

CPE2.3

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20233671-1/

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) Reachable Assertion

EUVDB-ID: #VU76392

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-2156

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion when handling IPv6 RPL protocol. A remote attacker can send specially crafted packets to the system and perform a denial of service (DoS) attack.