Debian Security Advisory

DLA-2451-1 libvncserver -- LTS security update

Date Reported:
15 Nov 2020
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2020-25708.
More information:

An issue has been found in libvncserver, an API to write one's own VNC server. Due to some missing checks, a divide by zero could happen, which could result in a denial of service.

For Debian 9 stretch, this problem has been fixed in version 0.9.11+dfsg-1.3~deb9u6.

We recommend that you upgrade your libvncserver packages.

For the detailed security status of libvncserver 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: