Debian alert DLA-2396-1 (tigervnc)

From:
             
 
"Roberto C. Sánchez" <roberto@debian.org>
To:
             
 
debian-lts-announce@lists.debian.org
Subject:
             
 
[SECURITY] [DLA 2396-1] tigervnc security update
Date:
             
 
Tue, 06 Oct 2020 17:41:55 -0400
Message-ID:
             
 
<20201006214155.GA6882@connexer.com>
-------------------------------------------------------------------------
Debian LTS Advisory DLA-2396-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                  Roberto C. Sánchez
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