Security update for libxml2

Announcement ID: SUSE-SU-2021:14729-1
Rating: important
References:
Cross-References:
CVSS scores:
  • CVE-2019-19956 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  • CVE-2019-19956 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2019-20388 ( SUSE ): 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
  • CVE-2019-20388 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2020-24977 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
  • CVE-2020-24977 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
  • CVE-2020-7595 ( SUSE ): 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
  • CVE-2020-7595 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2021-3516 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2021-3516 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • CVE-2021-3517 ( SUSE ): 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
  • CVE-2021-3517 ( NVD ): 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
  • CVE-2021-3518 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2021-3518 ( NVD ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • CVE-2021-3537 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2021-3537 ( NVD ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products:
  • SUSE Linux Enterprise Point of Service 11 SP3
  • SUSE Linux Enterprise Server 11 SP4
  • SUSE Linux Enterprise Server 11 SP4 LTSS 11-SP4

An update that solves nine vulnerabilities can now be installed.

Description:

This update for libxml2 fixes the following issues:

Security issues fixed:

  • CVE-2021-3537: NULL pointer dereference in valid.c:xmlValidBuildAContentModel (bsc#1185698)
  • CVE-2021-3518: Fixed a use after free in xinclude.c:xmlXIncludeDoProcess (bsc#1185408).
  • CVE-2021-3517: Fixed a heap based buffer overflow in entities.c:xmlEncodeEntitiesInternal (bsc#1185410).
  • CVE-2021-3516: Fixed a use after free in xmlEncodeEntitiesInternal() in entities.c (bsc#1185409)
  • CVE-2020-24977: Fixed a global-buffer-overflow in xmlEncodeEntitiesInternal (bsc#1176179).
  • CVE-2019-20388: Fixed a memory leak in xmlSchemaPreRun (bsc#1161521).
  • CVE-2020-7595: Fixed an infinite loop in an EOF situation (bsc#1161517).
  • CVE-2019-19956: Fixed a memory leak in xmlParseBalancedChunkMemoryRecover (bsc#1159928).

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:

  • SUSE Linux Enterprise Point of Service 11 SP3
    zypper in -t patch sleposp3-libxml2-14729=1
  • SUSE Linux Enterprise Server 11 SP4 LTSS 11-SP4
    zypper in -t patch slessp4-libxml2-14729=1
  • SUSE Linux Enterprise Server 11 SP4
    zypper in -t patch slessp4-libxml2-14729=1

Package List:

  • SUSE Linux Enterprise Point of Service 11 SP3 (i586)
    • libxml2-2.7.6-0.77.36.1
    • libxml2-doc-2.7.6-0.77.36.1
    • libxml2-python-2.7.6-0.77.36.1
  • SUSE Linux Enterprise Server 11 SP4 LTSS 11-SP4 (ppc64 s390x x86_64 i586)
    • libxml2-2.7.6-0.77.36.1
    • libxml2-doc-2.7.6-0.77.36.1
    • libxml2-python-2.7.6-0.77.36.1
  • SUSE Linux Enterprise Server 11 SP4 LTSS 11-SP4 (ppc64 s390x x86_64)
    • libxml2-32bit-2.7.6-0.77.36.1
  • SUSE Linux Enterprise Server 11 SP4 (ppc64 s390x x86_64 i586)
    • libxml2-2.7.6-0.77.36.1
    • libxml2-doc-2.7.6-0.77.36.1
    • libxml2-python-2.7.6-0.77.36.1
  • SUSE Linux Enterprise Server 11 SP4 (ppc64 s390x x86_64)
    • libxml2-32bit-2.7.6-0.77.36.1

References: