SUSE Security Update: Security update for the Linux Kernel (Live Patch 20 for SLE 12 SP4)
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Announcement ID:    SUSE-SU-2022:0298-1
Rating:             important
References:         #1191529 #1192036 #1193863 
Cross-References:   CVE-2018-25020 CVE-2020-3702 CVE-2021-42739
                   
CVSS scores:
                    CVE-2018-25020 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2020-3702 (NVD) : 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
                    CVE-2020-3702 (SUSE): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
                    CVE-2021-42739 (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 Live Patching 12-SP4
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   An update that fixes three vulnerabilities is now available.

Description:

   This update for the Linux Kernel 4.12.14-95_74 fixes several issues.

   The following security issues were fixed:

   - CVE-2018-25020: Fixed an issue in the BPF subsystem in the Linux kernel
     mishandled situations with a long jump over an instruction sequence
     where inner instructions require substantial expansions into multiple
     BPF instructions, leading to an overflow. (bsc#1193575)
   - CVE-2020-3702: Fixed a bug which could be triggered with specifically
     timed and handcrafted traffic and cause internal errors in a WLAN device
     that lead to improper layer 2 Wi-Fi encryption with a consequent
     possibility of information disclosure. (bsc#1191193)
   - CVE-2021-42739: The firewire subsystem had a buffer overflow related to
     drivers/media/firewire/firedtv-avc.c and
     drivers/media/firewire/firedtv-ci.c, because avc_ca_pmt mishandled
     bounds checking (bsc#1184673).


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 Live Patching 12-SP4:

      zypper in -t patch SUSE-SLE-Live-Patching-12-SP4-2022-298=1 SUSE-SLE-Live-Patching-12-SP4-2022-299=1 SUSE-SLE-Live-Patching-12-SP4-2022-300=1



Package List:

   - SUSE Linux Enterprise Live Patching 12-SP4 (ppc64le s390x x86_64):

      kgraft-patch-4_12_14-95_74-default-10-2.2
      kgraft-patch-4_12_14-95_77-default-9-2.2
      kgraft-patch-4_12_14-95_80-default-7-2.2


References:

   https://www.suse.com/security/cve/CVE-2018-25020.html
   https://www.suse.com/security/cve/CVE-2020-3702.html
   https://www.suse.com/security/cve/CVE-2021-42739.html
   https://bugzilla.suse.com/1191529
   https://bugzilla.suse.com/1192036
   https://bugzilla.suse.com/1193863