SUSE Security Update: Security update for the Linux Kernel (Live Patch 8 for
 SLE 15 SP2)
______________________________________________________________________________

Announcement ID:    SUSE-SU-2021:0841-1
Rating:             important
References:         #1178684 #1179664 #1181553 
Cross-References:   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
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   An update that fixes three vulnerabilities is now available.

Description:

   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".

   Alternatively you can run the command listed for your product:

   - SUSE Linux Enterprise Module for Live Patching 15-SP2:

      zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP2-2021-841=1



Package List:

   - SUSE Linux Enterprise Module for Live Patching 15-SP2 (ppc64le s390x
 x86_64):

      kernel-livepatch-5_3_18-24_43-default-3-2.2
      kernel-livepatch-5_3_18-24_43-default-debuginfo-3-2.2
      kernel-livepatch-SLE15-SP2_Update_8-debugsource-3-2.2


References:

   https://www.suse.com/security/cve/CVE-2020-28374.html
   https://www.suse.com/security/cve/CVE-2020-29368.html
   https://www.suse.com/security/cve/CVE-2021-3347.html
   https://bugzilla.suse.com/1178684
   https://bugzilla.suse.com/1179664
   https://bugzilla.suse.com/1181553