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SUSE: 2021:0841-1 Important: Live Kernel Patch Fixes Critical Issues

suse
Calendar Grey March 17, 2021
Dist Suse Esm H88
New Update for Linux Kernel (Live Patch 8 for SLE 15 SP2) addresses serious security flaws.
An update that fixes three vulnerabilities is now available

Summary

This update for the Linux Kernel 5.3.18-24_43 fixes several issues. The following security issues were fixed: - CVE-2020-29368: Fixed an issue in copy-on-write implementation which could have granted unintended write access because of a race condition in a THP mapcount check (bsc#1179664). - CVE-2021-3347: Fixed a use-after-free in the PI futexes during fault handling, allowing local users to execute code in the kernel (bsc#1181553). - CVE-2020-28374: Fixed insufficient identifier checking in the LIO SCSI target code which could have been used by remote attackers to read or write files via directory traversal in an XCOPY request (bsc#1178684). Patch Instructions: To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

Topics%20covered

Topics Covered

security advisory critical remote access kernel patch race condition SUSE Linux Kernel

References

#1178684 #1179664 #1181553

Cross- CVE-2020-28374 CVE-2020-29368 CVE-2021-3347

CVSS scores:

CVE-2020-28374 (NVD) : 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVE-2020-28374 (SUSE): 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVE-2020-29368 (NVD) : 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2020-29368 (SUSE): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2021-3347 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2021-3347 (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 Module for Live Patching 15-SP2

https://www.suse.com/security/cve/CVE-2020-28374.html

https://www.suse.com/security/cve/CVE-2020-29368.html

Severity
important
Lowest
Low
Medium
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Critical

Announcement ID: SUSE-SU-2021:0841-1
Rating: important

Topics%20covered

Topics Covered

security advisory critical remote access kernel patch race condition SUSE Linux Kernel

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