SUSE Security Update: Security update for tigervnc
______________________________________________________________________________

Announcement ID:    SUSE-SU-2020:1749-1
Rating:             important
References:         #1159856 #1159858 #1159860 #1160249 #1160250 
                    #1160251 #1160937 #1165680 #1169952 
Cross-References:   CVE-2019-15691 CVE-2019-15692 CVE-2019-15693
                    CVE-2019-15694 CVE-2019-15695
Affected Products:
                    SUSE Linux Enterprise Server 12-SP5
                    SUSE Linux Enterprise Server 12-SP4
______________________________________________________________________________

   An update that solves 5 vulnerabilities and has four fixes
   is now available.

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 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 Server 12-SP5:

      zypper in -t patch SUSE-SLE-SERVER-12-SP5-2020-1749=1

   - SUSE Linux Enterprise Server 12-SP4:

      zypper in -t patch SUSE-SLE-SERVER-12-SP4-2020-1749=1



Package List:

   - SUSE Linux Enterprise Server 12-SP5 (aarch64 ppc64le s390x x86_64):

      libXvnc1-1.6.0-22.14.1
      libXvnc1-debuginfo-1.6.0-22.14.1
      tigervnc-1.6.0-22.14.1
      tigervnc-debuginfo-1.6.0-22.14.1
      tigervnc-debugsource-1.6.0-22.14.1
      xorg-x11-Xvnc-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
      libXvnc1-debuginfo-1.6.0-22.14.1
      tigervnc-1.6.0-22.14.1
      tigervnc-debuginfo-1.6.0-22.14.1
      tigervnc-debugsource-1.6.0-22.14.1
      xorg-x11-Xvnc-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/1159856
   https://bugzilla.suse.com/1159858
   https://bugzilla.suse.com/1159860
   https://bugzilla.suse.com/1160249
   https://bugzilla.suse.com/1160250
   https://bugzilla.suse.com/1160251
   https://bugzilla.suse.com/1160937
   https://bugzilla.suse.com/1165680
   https://bugzilla.suse.com/1169952

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