DLA 2396-1: tigervnc security update
-------------------------------------------------------------------------
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
A tigervnc security update has been released for Debian GNU/Linux 9 LTS to address an issue where viewer implementation mishandles TLS certificate exceptions.
