Debian Security Advisory

DLA-2396-1 tigervnc -- LTS security update

Date Reported:
06 Oct 2020
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 971272.
In Mitre's CVE dictionary: CVE-2020-26117.
More information:

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:

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