SUSE update for the Linux Kernel (Live Patch 6 for SLE 15 SP3)

1) Use-after-free

EUVDB-ID: #VU61246

Risk: Low

CVSSv3.1: 6.1 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-4083

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 Linux kernel's garbage collection for Unix domain socket file handlers. A local user can call close() and fget() simultaneously and can potentially trigger a race condition, which in turn leads to a use-after-free error and allows privilege escalation.

Mitigation

Update the affected package the Linux Kernel (Live Patch 6 for SLE 15 SP3) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 15-SP2 - 15-SP3-LTSS

SUSE Linux Enterprise High Performance Computing: 15-SP2 - 15-SP3-LTSS

SUSE Linux Enterprise Server for SAP Applications: 15-SP2 - 15-SP3

SUSE Linux Enterprise Module for Live Patching: 15-SP2 - 15-SP3

SUSE Linux Enterprise Micro: 5.1

kernel-livepatch-SLE15-SP2_Update_11-debugsource: before 14-2.2

kernel-livepatch-5_3_18-24_52-default-debuginfo: before 14-2.2

kernel-livepatch-5_3_18-24_52-default: before 14-2.2

kernel-livepatch-SLE15-SP3_Update_7-debugsource: before 5-150300.2.2

kernel-livepatch-SLE15-SP3_Update_6-debugsource: before 5-150300.2.2

kernel-livepatch-SLE15-SP3_Update_2-debugsource: before 9-150300.2.2

kernel-livepatch-SLE15-SP3_Update_1-debugsource: before 9-150300.2.2

kernel-livepatch-5_3_18-59_5-default-debuginfo: before 9-150300.2.2

kernel-livepatch-5_3_18-59_5-default: before 9-150300.2.2

kernel-livepatch-5_3_18-59_27-default-debuginfo: before 5-150300.2.2

kernel-livepatch-5_3_18-59_27-default: before 5-150300.2.2

kernel-livepatch-5_3_18-59_24-default-debuginfo: before 5-150300.2.2

kernel-livepatch-5_3_18-59_24-default: before 5-150300.2.2

kernel-livepatch-5_3_18-59_10-default-debuginfo: before 9-150300.2.2

kernel-livepatch-5_3_18-59_10-default: before 9-150300.2.2

External links

http://www.suse.com/support/update/announcement/2022/suse-su-20220463-1/

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: #VU63764

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-4202

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 in the nci_request() function in net/nfc/nci/core.c in NFC Controller Interface (NCI) in the Linux kernel. A local user can cause a data race problem while the device is getting removed and escalate privileges on the system.

Mitigation

Update the affected package the Linux Kernel (Live Patch 6 for SLE 15 SP3) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 15-SP2 - 15-SP3-LTSS

SUSE Linux Enterprise High Performance Computing: 15-SP2 - 15-SP3-LTSS

SUSE Linux Enterprise Server for SAP Applications: 15-SP2 - 15-SP3

SUSE Linux Enterprise Module for Live Patching: 15-SP2 - 15-SP3

SUSE Linux Enterprise Micro: 5.1

kernel-livepatch-SLE15-SP2_Update_11-debugsource: before 14-2.2

kernel-livepatch-5_3_18-24_52-default-debuginfo: before 14-2.2

kernel-livepatch-5_3_18-24_52-default: before 14-2.2

kernel-livepatch-SLE15-SP3_Update_7-debugsource: before 5-150300.2.2

kernel-livepatch-SLE15-SP3_Update_6-debugsource: before 5-150300.2.2

kernel-livepatch-SLE15-SP3_Update_2-debugsource: before 9-150300.2.2

kernel-livepatch-SLE15-SP3_Update_1-debugsource: before 9-150300.2.2

kernel-livepatch-5_3_18-59_5-default-debuginfo: before 9-150300.2.2

kernel-livepatch-5_3_18-59_5-default: before 9-150300.2.2

kernel-livepatch-5_3_18-59_27-default-debuginfo: before 5-150300.2.2

kernel-livepatch-5_3_18-59_27-default: before 5-150300.2.2

kernel-livepatch-5_3_18-59_24-default-debuginfo: before 5-150300.2.2

kernel-livepatch-5_3_18-59_24-default: before 5-150300.2.2

kernel-livepatch-5_3_18-59_10-default-debuginfo: before 9-150300.2.2

kernel-livepatch-5_3_18-59_10-default: before 9-150300.2.2

External links

http://www.suse.com/support/update/announcement/2022/suse-su-20220463-1/

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

3) Stack-based buffer overflow

EUVDB-ID: #VU61216

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-0435

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the Linux kernel networking module for the Transparent Inter-Process Communication (TIPC) protocol. A remote unauthenticated attacker can send specially crafted traffic to the system, trigger a stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system but requires that the TIPC bearer is set up.

Mitigation

Update the affected package the Linux Kernel (Live Patch 6 for SLE 15 SP3) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 15-SP2 - 15-SP3-LTSS

SUSE Linux Enterprise High Performance Computing: 15-SP2 - 15-SP3-LTSS

SUSE Linux Enterprise Server for SAP Applications: 15-SP2 - 15-SP3

SUSE Linux Enterprise Module for Live Patching: 15-SP2 - 15-SP3

SUSE Linux Enterprise Micro: 5.1

kernel-livepatch-SLE15-SP2_Update_11-debugsource: before 14-2.2

kernel-livepatch-5_3_18-24_52-default-debuginfo: before 14-2.2

kernel-livepatch-5_3_18-24_52-default: before 14-2.2

kernel-livepatch-SLE15-SP3_Update_7-debugsource: before 5-150300.2.2

kernel-livepatch-SLE15-SP3_Update_6-debugsource: before 5-150300.2.2

kernel-livepatch-SLE15-SP3_Update_2-debugsource: before 9-150300.2.2

kernel-livepatch-SLE15-SP3_Update_1-debugsource: before 9-150300.2.2

kernel-livepatch-5_3_18-59_5-default-debuginfo: before 9-150300.2.2

kernel-livepatch-5_3_18-59_5-default: before 9-150300.2.2

kernel-livepatch-5_3_18-59_27-default-debuginfo: before 5-150300.2.2

kernel-livepatch-5_3_18-59_27-default: before 5-150300.2.2

kernel-livepatch-5_3_18-59_24-default-debuginfo: before 5-150300.2.2

kernel-livepatch-5_3_18-59_24-default: before 5-150300.2.2

kernel-livepatch-5_3_18-59_10-default-debuginfo: before 9-150300.2.2

kernel-livepatch-5_3_18-59_10-default: before 9-150300.2.2

External links

http://www.suse.com/support/update/announcement/2022/suse-su-20220463-1/

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.