Security update for tigervnc

Announcement ID:	SUSE-SU-2020:1749-1
Rating:	important
References:	bsc#1159856 bsc#1159858 bsc#1159860 bsc#1160249 bsc#1160250 bsc#1160251 bsc#1160937 bsc#1165680 bsc#1169952
Cross-References:	CVE-2019-15691 CVE-2019-15692 CVE-2019-15693 CVE-2019-15694 CVE-2019-15695
CVSS scores:	CVE-2019-15691 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2019-15691 ( NVD ): 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVE-2019-15692 ( SUSE ): 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVE-2019-15692 ( NVD ): 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVE-2019-15693 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2019-15693 ( NVD ): 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVE-2019-15694 ( SUSE ): 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVE-2019-15694 ( NVD ): 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVE-2019-15695 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2019-15695 ( NVD ): 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Affected Products:	SUSE Linux Enterprise High Performance Computing 12 SP4 SUSE Linux Enterprise High Performance Computing 12 SP5 SUSE Linux Enterprise Server 12 SP4 SUSE Linux Enterprise Server 12 SP5 SUSE Linux Enterprise Server for SAP Applications 12 SP4 SUSE Linux Enterprise Server for SAP Applications 12 SP5

An update that solves five vulnerabilities and has four security fixes can now be installed.

Description:

This update for tigervnc fixes the following issues:

• CVE-2019-15691: Fixed a use-after-return due to incorrect usage of stack memory in ZRLEDecoder (bsc#1159856).
• CVE-2019-15692: Fixed a heap-based buffer overflow in CopyRectDecode (bsc#1160250).
• CVE-2019-15693: Fixed a heap-based buffer overflow in TightDecoder::FilterGradient (bsc#1159858).
• CVE-2019-15694: Fixed a heap-based buffer overflow, caused by improper error handling in processing MemOutStream (bsc#1160251).
• CVE-2019-15695: Fixed a stack-based buffer overflow, which could be triggered from CMsgReader::readSetCursor (bsc#1159860).

Other bugs fixed:

• Fix random connection freezes (bsc#1169952, bsc#1160249, bsc#1165680):

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 High Performance Computing 12 SP4
  zypper in -t patch SUSE-SLE-SERVER-12-SP4-2020-1749=1
• SUSE Linux Enterprise Server 12 SP4
  zypper in -t patch SUSE-SLE-SERVER-12-SP4-2020-1749=1
• SUSE Linux Enterprise Server for SAP Applications 12 SP4
  zypper in -t patch SUSE-SLE-SERVER-12-SP4-2020-1749=1
• SUSE Linux Enterprise Server for SAP Applications 12 SP5
  zypper in -t patch SUSE-SLE-SERVER-12-SP5-2020-1749=1
• SUSE Linux Enterprise High Performance Computing 12 SP5
  zypper in -t patch SUSE-SLE-SERVER-12-SP5-2020-1749=1
• SUSE Linux Enterprise Server 12 SP5
  zypper in -t patch SUSE-SLE-SERVER-12-SP5-2020-1749=1

Package List:

• SUSE Linux Enterprise High Performance Computing 12 SP4 (aarch64 x86_64)
  • libXvnc1-1.6.0-22.14.1
  • tigervnc-1.6.0-22.14.1
  • tigervnc-debuginfo-1.6.0-22.14.1
  • xorg-x11-Xvnc-1.6.0-22.14.1
  • tigervnc-debugsource-1.6.0-22.14.1
  • libXvnc1-debuginfo-1.6.0-22.14.1
  • xorg-x11-Xvnc-debuginfo-1.6.0-22.14.1
• SUSE Linux Enterprise Server 12 SP4 (aarch64 ppc64le s390x x86_64)
  • libXvnc1-1.6.0-22.14.1
  • tigervnc-1.6.0-22.14.1
  • tigervnc-debuginfo-1.6.0-22.14.1
  • xorg-x11-Xvnc-1.6.0-22.14.1
  • tigervnc-debugsource-1.6.0-22.14.1
  • libXvnc1-debuginfo-1.6.0-22.14.1
  • xorg-x11-Xvnc-debuginfo-1.6.0-22.14.1
• SUSE Linux Enterprise Server for SAP Applications 12 SP4 (ppc64le x86_64)
  • libXvnc1-1.6.0-22.14.1
  • tigervnc-1.6.0-22.14.1
  • tigervnc-debuginfo-1.6.0-22.14.1
  • xorg-x11-Xvnc-1.6.0-22.14.1
  • tigervnc-debugsource-1.6.0-22.14.1
  • libXvnc1-debuginfo-1.6.0-22.14.1
  • xorg-x11-Xvnc-debuginfo-1.6.0-22.14.1
• SUSE Linux Enterprise Server for SAP Applications 12 SP5 (ppc64le x86_64)
  • libXvnc1-1.6.0-22.14.1
  • tigervnc-1.6.0-22.14.1
  • tigervnc-debuginfo-1.6.0-22.14.1
  • xorg-x11-Xvnc-1.6.0-22.14.1
  • tigervnc-debugsource-1.6.0-22.14.1
  • libXvnc1-debuginfo-1.6.0-22.14.1
  • xorg-x11-Xvnc-debuginfo-1.6.0-22.14.1
• SUSE Linux Enterprise High Performance Computing 12 SP5 (aarch64 x86_64)
  • libXvnc1-1.6.0-22.14.1
  • tigervnc-1.6.0-22.14.1
  • tigervnc-debuginfo-1.6.0-22.14.1
  • xorg-x11-Xvnc-1.6.0-22.14.1
  • tigervnc-debugsource-1.6.0-22.14.1
  • libXvnc1-debuginfo-1.6.0-22.14.1
  • xorg-x11-Xvnc-debuginfo-1.6.0-22.14.1
• SUSE Linux Enterprise Server 12 SP5 (aarch64 ppc64le s390x x86_64)
  • libXvnc1-1.6.0-22.14.1
  • tigervnc-1.6.0-22.14.1
  • tigervnc-debuginfo-1.6.0-22.14.1
  • xorg-x11-Xvnc-1.6.0-22.14.1
  • tigervnc-debugsource-1.6.0-22.14.1
  • libXvnc1-debuginfo-1.6.0-22.14.1
  • xorg-x11-Xvnc-debuginfo-1.6.0-22.14.1

References:

• https://www.suse.com/security/cve/CVE-2019-15691.html
• https://www.suse.com/security/cve/CVE-2019-15692.html
• https://www.suse.com/security/cve/CVE-2019-15693.html
• https://www.suse.com/security/cve/CVE-2019-15694.html
• https://www.suse.com/security/cve/CVE-2019-15695.html
• https://bugzilla.suse.com/show_bug.cgi?id=1159856
• https://bugzilla.suse.com/show_bug.cgi?id=1159858
• https://bugzilla.suse.com/show_bug.cgi?id=1159860
• https://bugzilla.suse.com/show_bug.cgi?id=1160249
• https://bugzilla.suse.com/show_bug.cgi?id=1160250
• https://bugzilla.suse.com/show_bug.cgi?id=1160251
• https://bugzilla.suse.com/show_bug.cgi?id=1160937
• https://bugzilla.suse.com/show_bug.cgi?id=1165680
• https://bugzilla.suse.com/show_bug.cgi?id=1169952