Debian Security Advisory

DLA-668-1 libass -- LTS security update

Date Reported:
19 Oct 2016
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2016-7969, CVE-2016-7972.
More information:

Several vulnerabilities were discovered in libass, a library for manipulating the SubStation Alpha (SSA) subtitle file format. The Common Vulnerabilities and Exposures project identifies the following issues.

  • CVE-2016-7969

    Mode 0/3 line wrapping equalization in specific cases which could result in illegal reads while laying out and shaping text.

  • CVE-2016-7972

    Memory reallocation issue in the shaper which lead to undefined behavior

For Debian 7 Wheezy, these problems have been fixed in version 0.10.0-3+deb7u1.

We recommend that you upgrade your libass packages.

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