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SUSE: 2021:0859-1 Important Kernel Live Patch - Critical NFS Exploit

suse
Calendar Grey March 17, 2021
Dist Suse Esm H88
The recent security patch from SUSE tackles significant kernel vulnerabilities, notably memory corruption flaws and potential privilege elevation risks.
An update that solves 5 vulnerabilities and has two fixes is now available

Summary

This update for the Linux Kernel 4.12.14-197_48 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). - Fixed an issue where NFS client filesystems got unmounted on fail-over (bsc#1182468). - Fixed an issue where NFS client hanged on write errors (bsc#1182108). - 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-2020-27786: Fixed a potential user after free which could have led to memory corruption or privilege escalation (bsc#1179616). - CVE-2020-28374: Fixed insufficient identifier checking in the LIO SCSI

Topics%20covered

Topics Covered

security advisory critical privilege escalation memory corruption kernel patch SUSE NFS exploit

References

#1178684 #1179616 #1179664 #1180859 #1181553

#1182108 #1182468

Cross- CVE-2020-27786 CVE-2020-28374 CVE-2020-29368

CVE-2021-0342 CVE-2021-3347

CVSS scores:

CVE-2020-27786 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2020-27786 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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-2021-0342 (NVD) : 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVE-2021-0342 (SUSE): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity
important
Lowest
Low
Medium
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Critical

Announcement ID: SUSE-SU-2021:0859-1
Rating: important

Topics%20covered

Topics Covered

security advisory critical privilege escalation memory corruption kernel patch SUSE NFS exploit

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