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SUSE: 2022:2444-1 Important: Kernel Live Patch Escalation Issues

suse
Calendar Grey July 19, 2022
Dist Suse Esm H88
SUSE Security Bulletin: Addresses severe kernel flaws in Live Patch 23 for SLE 12 SP4, including advisory information.
An update that fixes three vulnerabilities is now available

Summary

This update for the Linux Kernel 4.12.14-95_83 fixes several issues. The following security issues were fixed: - CVE-2022-20154: Fixed a use after free due to a race condition in lock_sock_nested of sock.c. This could lead to local escalation of privilege with System execution privileges needed (bsc#1200599). - CVE-2022-21499: Reinforced the kernel lockdown feature, until now it's been trivial to break out of it with kgdb or kdb (bsc#1199426). - CVE-2022-1729: Fixed a sys_perf_event_open() race condition against self (bsc#1199507). Patch Instructions: To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: - SUSE Linux Enterprise Live Patching 12-SP4:

Topics%20covered

Topics Covered

security advisory kernel patch important escalation live patching

References

#1199697 #1200059 #1200608

Cross- CVE-2022-1729 CVE-2022-20154 CVE-2022-21499

CVSS scores:

CVE-2022-1729 (SUSE): 8.2 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

CVE-2022-20154 (NVD) : 6.4 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

CVE-2022-20154 (SUSE): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2022-21499 (NVD) : 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVE-2022-21499 (SUSE): 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products:

SUSE Linux Enterprise Live Patching 12-SP4

https://www.suse.com/security/cve/CVE-2022-1729.html

https://www.suse.com/security/cve/CVE-2022-20154.html

https://www.suse.com/security/cve/CVE-2022-21499.html

https://bugzilla.suse.com/1199697

https://bugzilla.suse.com/1200059

Severity
important
Lowest
Low
Medium
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Critical

Announcement ID: SUSE-SU-2022:2444-1
Rating: important

Topics%20covered

Topics Covered

security advisory kernel patch important escalation live patching

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