Security update for libxml2

Announcement ID:	SUSE-SU-2021:1523-1
Rating:	moderate
References:	bsc#1185408 bsc#1185409 bsc#1185410
Cross-References:	CVE-2021-3516 CVE-2021-3517 CVE-2021-3518
CVSS scores:	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
Affected Products:	Basesystem Module 15-SP2 Basesystem Module 15-SP3 Python 2 Module 15-SP2 Python 2 Module 15-SP3 SUSE Linux Enterprise Desktop 15 SP2 SUSE Linux Enterprise Desktop 15 SP3 SUSE Linux Enterprise High Performance Computing 15 SP2 SUSE Linux Enterprise High Performance Computing 15 SP3 SUSE Linux Enterprise Micro 5.0 SUSE Linux Enterprise Real Time 15 SP2 SUSE Linux Enterprise Real Time 15 SP3 SUSE Linux Enterprise Server 15 SP2 SUSE Linux Enterprise Server 15 SP2 Business Critical Linux 15-SP2 SUSE Linux Enterprise Server 15 SP3 SUSE Linux Enterprise Server 15 SP3 Business Critical Linux 15-SP3 SUSE Linux Enterprise Server for SAP Applications 15 SP2 SUSE Linux Enterprise Server for SAP Applications 15 SP3 SUSE Manager Proxy 4.1 SUSE Manager Proxy 4.2 SUSE Manager Retail Branch Server 4.1 SUSE Manager Retail Branch Server 4.2 SUSE Manager Server 4.1 SUSE Manager Server 4.2

An update that solves three vulnerabilities can now be installed.

Description:

This update for libxml2 fixes the following issues:

• 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 entities.c:xmlEncodeEntitiesInternal (bsc#1185409).

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:

• Basesystem Module 15-SP2
  zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP2-2021-1523=1
• Basesystem Module 15-SP3
  zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP3-2021-1523=1
• Python 2 Module 15-SP2
  zypper in -t patch SUSE-SLE-Module-Python2-15-SP2-2021-1523=1
• Python 2 Module 15-SP3
  zypper in -t patch SUSE-SLE-Module-Python2-15-SP3-2021-1523=1
• SUSE Linux Enterprise Micro 5.0
  zypper in -t patch SUSE-SUSE-MicroOS-5.0-2021-1523=1

Package List:

• Basesystem Module 15-SP2 (aarch64 ppc64le s390x x86_64)
  • libxml2-devel-2.9.7-3.31.1
  • python-libxml2-python-debugsource-2.9.7-3.31.1
  • libxml2-tools-2.9.7-3.31.1
  • libxml2-2-2.9.7-3.31.1
  • libxml2-debugsource-2.9.7-3.31.1
  • libxml2-tools-debuginfo-2.9.7-3.31.1
  • libxml2-2-debuginfo-2.9.7-3.31.1
  • python3-libxml2-python-2.9.7-3.31.1
  • python3-libxml2-python-debuginfo-2.9.7-3.31.1
• Basesystem Module 15-SP2 (x86_64)
  • libxml2-2-32bit-debuginfo-2.9.7-3.31.1
  • libxml2-2-32bit-2.9.7-3.31.1
• Basesystem Module 15-SP3 (aarch64 ppc64le s390x x86_64)
  • libxml2-devel-2.9.7-3.31.1
  • python-libxml2-python-debugsource-2.9.7-3.31.1
  • libxml2-tools-2.9.7-3.31.1
  • libxml2-2-2.9.7-3.31.1
  • libxml2-debugsource-2.9.7-3.31.1
  • libxml2-tools-debuginfo-2.9.7-3.31.1
  • libxml2-2-debuginfo-2.9.7-3.31.1
  • python3-libxml2-python-2.9.7-3.31.1
  • python3-libxml2-python-debuginfo-2.9.7-3.31.1
• Basesystem Module 15-SP3 (x86_64)
  • libxml2-2-32bit-debuginfo-2.9.7-3.31.1
  • libxml2-2-32bit-2.9.7-3.31.1
• Python 2 Module 15-SP2 (aarch64 ppc64le s390x x86_64)
  • python-libxml2-python-debugsource-2.9.7-3.31.1
  • python2-libxml2-python-2.9.7-3.31.1
  • python2-libxml2-python-debuginfo-2.9.7-3.31.1
• Python 2 Module 15-SP3 (aarch64 ppc64le s390x x86_64)
  • python-libxml2-python-debugsource-2.9.7-3.31.1
  • python2-libxml2-python-2.9.7-3.31.1
  • python2-libxml2-python-debuginfo-2.9.7-3.31.1
• SUSE Linux Enterprise Micro 5.0 (aarch64 x86_64)
  • libxml2-tools-2.9.7-3.31.1
  • libxml2-2-2.9.7-3.31.1
  • libxml2-debugsource-2.9.7-3.31.1
  • libxml2-tools-debuginfo-2.9.7-3.31.1
  • libxml2-2-debuginfo-2.9.7-3.31.1

References:

• https://www.suse.com/security/cve/CVE-2021-3516.html
• https://www.suse.com/security/cve/CVE-2021-3517.html
• https://www.suse.com/security/cve/CVE-2021-3518.html
• https://bugzilla.suse.com/show_bug.cgi?id=1185408
• https://bugzilla.suse.com/show_bug.cgi?id=1185409
• https://bugzilla.suse.com/show_bug.cgi?id=1185410