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SUSE: 2021:2542-1 Important Kernel Update Addressing Security Flaws

suse
Calendar Grey July 28, 2021
Dist Suse Esm H88
A significant revision for SUSE's Linux Kernel tackles various security vulnerabilities, notably including local privilege elevations.
An update that fixes three vulnerabilities is now available

Summary

This update for the Linux Kernel 4.12.14-197_78 fixes several issues. The following security issues were fixed: - CVE-2021-33909: Fixed an out-of-bounds write in the filesystem layer that allows to andobtain full root privileges. (bsc#1188062) - CVE-2021-22555: Fixed an heap out-of-bounds write in net/netfilter/x_tables.c that could allow local provilege escalation. (bsc#1188116) - CVE-2020-36385: Fixed a use-after-free vulnerability reached via the ctx_list in some ucma_migrate_id situations where ucma_close is called. (bnc#1187050) 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 Module for Live Patching 15-SP2:

Topics%20covered

Topics Covered

security advisory local privilege escalation important SUSE kernel live patch

References

#1187052 #1188117 #1188257

Cross- CVE-2020-36385 CVE-2021-22555 CVE-2021-33909

CVSS scores:

CVE-2020-36385 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVE-2020-36385 (SUSE): 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVE-2021-22555 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2021-22555 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2021-33909 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products:

SUSE Linux Enterprise Module for Live Patching 15-SP2

SUSE Linux Enterprise Module for Live Patching 15-SP1

https://www.suse.com/security/cve/CVE-2020-36385.html

https://www.suse.com/security/cve/CVE-2021-22555.html

https://www.suse.com/security/cve/CVE-2021-33909.html

Severity
important
Lowest
Low
Medium
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Critical

Announcement ID: SUSE-SU-2021:2542-1
Rating: important

Topics%20covered

Topics Covered

security advisory local privilege escalation important SUSE kernel live patch

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