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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.3457
                         tigervnc security update
                              7 October 2020

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

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

Product:           tigervnc
Publisher:         Debian
Operating System:  Debian GNU/Linux 9
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Provide Misleading Information -- Remote with User Interaction
                   Access Confidential Data       -- Remote with User Interaction
                   Reduced Security               -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-26117  

Original Bulletin: 
   https://lists.debian.org/debian-lts-announce/2020/10/msg00007.html

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Debian. It is recommended that administrators 
         running tigervnc check for an updated version of the software for 
         their operating system.

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- -------------------------------------------------------------------------
Debian LTS Advisory DLA-2396-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                  Roberto C. S=E1nchez
October 06, 2020                              https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package        : tigervnc
Version        : 1.7.0+dfsg-7+deb9u2
CVE ID         : CVE-2020-26117
Debian Bug     : 971272

A vulnerability was discovered in tigernvc, a Virtual Network Computing
client and server implementation.  The viewer implementation mishandles
TLS certificate exceptions, storing the certificates as authorities,
meaning that the owner of a certificate could impersonate any server
after a client had added an exception.

For Debian 9 stretch, this problem has been fixed in version
1.7.0+dfsg-7+deb9u2.

We recommend that you upgrade your tigervnc packages.

For the detailed security status of tigervnc please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/tigervnc

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

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