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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2023.6405
    Security update for the Linux Kernel (Live Patch 4 for SLE 15 SP4)
                              2 November 2023

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Linux Kernel (Live Patch 4 for SLE 15 SP4)
Publisher:         SUSE
Operating System:  SUSE
Resolution:        Patch/Upgrade
CVE Names:         CVE-2023-4623 CVE-2023-4147 CVE-2023-4004
                   CVE-2023-3390  

Original Bulletin: 
   https://www.suse.com/support/update/announcement/2023/suse-su-20234267-1

Comment: CVSS (Max):  7.8 CVE-2023-4623 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
         CVSS Source: SUSE
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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Security update for the Linux Kernel (Live Patch 4 for SLE 15 SP4)

Announcement ID:  SUSE-SU-2023:4267-1
     Rating:      important
                    o bsc#1212934
                    o bsc#1214812
   References:      o bsc#1215118
                    o bsc#1215440

                    o CVE-2023-3390
                    o CVE-2023-4004
Cross-References:   o CVE-2023-4147
                    o CVE-2023-4623

                    o CVE-2023-3390 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/
                      S:U/C:H/I:H/A:H
                    o CVE-2023-3390 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/
                      S:U/C:H/I:H/A:H
                    o CVE-2023-4004 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/
                      S:U/C:H/I:H/A:H
                    o CVE-2023-4004 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/
                      S:U/C:H/I:H/A:H
  CVSS scores:      o CVE-2023-4147 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/
                      S:U/C:H/I:H/A:H
                    o CVE-2023-4147 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/
                      S:U/C:H/I:H/A:H
                    o CVE-2023-4623 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/
                      S:U/C:H/I:H/A:H
                    o CVE-2023-4623 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/
                      S:U/C:H/I:H/A:H

                    o openSUSE Leap 15.4
                    o SUSE Linux Enterprise High Performance Computing 15 SP4
                    o SUSE Linux Enterprise Live Patching 15-SP4
    Affected        o SUSE Linux Enterprise Micro 5.3
    Products:       o SUSE Linux Enterprise Micro 5.4
                    o SUSE Linux Enterprise Real Time 15 SP4
                    o SUSE Linux Enterprise Server 15 SP4
                    o SUSE Linux Enterprise Server for SAP Applications 15 SP4

An update that solves four vulnerabilities can now be installed.

Description:

This update for the Linux Kernel 5.14.21-150400_24_28 fixes several issues.

The following security issues were fixed:

  o CVE-2023-4147: Fixed use-after-free in nf_tables_newrule (bsc#1215118).
  o CVE-2023-4623: Fixed a use-after-free issue in the HFSC network scheduler
    which could be exploited to achieve local privilege escalation (bsc#
    1215440).
  o CVE-2023-4004: Fixed improper element removal netfilter nft_set_pipapo (bsc
    #1214812).
  o CVE-2023-3390: Fixed an use-after-free vulnerability in the netfilter
    subsystem in net/netfilter/nf_tables_api.c that could allow a local
    attacker with user access to cause a privilege escalation issue (bsc#
    1212934).

Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  o openSUSE Leap 15.4
    zypper in -t patch SUSE-2023-4267=1
  o SUSE Linux Enterprise Live Patching 15-SP4
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP4-2023-4267=1

Package List:

  o openSUSE Leap 15.4 (ppc64le s390x x86_64)
       kernel-livepatch-5_14_21-150400_24_28-default-13-150400.2.3
       kernel-livepatch-SLE15-SP4_Update_4-debugsource-13-150400.2.3
       kernel-livepatch-5_14_21-150400_24_28-default-debuginfo-13-150400.2.3
  o SUSE Linux Enterprise Live Patching 15-SP4 (ppc64le s390x x86_64)
       kernel-livepatch-5_14_21-150400_24_28-default-13-150400.2.3
       kernel-livepatch-SLE15-SP4_Update_4-debugsource-13-150400.2.3
       kernel-livepatch-5_14_21-150400_24_28-default-debuginfo-13-150400.2.3

References:

  o https://www.suse.com/security/cve/CVE-2023-3390.html
  o https://www.suse.com/security/cve/CVE-2023-4004.html
  o https://www.suse.com/security/cve/CVE-2023-4147.html
  o https://www.suse.com/security/cve/CVE-2023-4623.html
  o https://bugzilla.suse.com/show_bug.cgiid=1212934
  o https://bugzilla.suse.com/show_bug.cgiid=1214812
  o https://bugzilla.suse.com/show_bug.cgiid=1215118
  o https://bugzilla.suse.com/show_bug.cgiid=1215440

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===========================================================================
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