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SUSE: 2021:0871-2 Critical: Ubuntu Kernel Security Update for 16.04 LTS

suse
Calendar Grey March 17, 2021
Dist Suse Esm H88
Essential patch released for the Linux Kernel tackling key security flaws, enhancing system defenses and efficiency.
An update that fixes three vulnerabilities is now available

Summary

This update for the Linux Kernel 4.4.121-92_138 fixes several issues. The following security issues were fixed: - 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 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". Alternatively you can run the command listed for your product:

Topics%20covered

Topics Covered

security advisory code execution privilege escalation memory corruption important SUSE Linux Kernel

References

#1178684 #1179616 #1181553

Cross- CVE-2020-27786 CVE-2020-28374 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-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 OpenStack Cloud 7

SUSE Linux Enterprise Server for SAP 12-SP3

SUSE Linux Enterprise Server for SAP 12-SP2

SUSE Linux Enterprise Server 12-SP3-LTSS

SUSE Linux Enterprise Server 12-SP2-LTSS

Severity
critical
Lowest
Low
Medium
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Critical

Announcement ID: SUSE-SU-2021:0870-1
Rating: important

Topics%20covered

Topics Covered

security advisory code execution privilege escalation memory corruption important SUSE Linux Kernel

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