USN-2927-1: graphite2 vulnerabilities

Ubuntu Security Notice USN-2927-1

14th March, 2016

graphite2 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 15.10
• Ubuntu 14.04 LTS

Summary

graphite2 could be made to crash or run programs as your login if it opened a specially crafted font.

Software description

• graphite2 - Font rendering engine for Complex Scripts

Details

It was discovered that graphite2 incorrectly handled certain malformed
fonts. If a user or automated system were tricked into opening a specially-
crafted font file, a remote attacker could use this issue to cause
graphite2 to crash, resulting in a denial of service, or possibly execute
arbitrary code.

Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 15.10:

libgraphite2-3 1.3.6-1ubuntu0.15.10.1

Ubuntu 14.04 LTS:

libgraphite2-3 1.3.6-1ubuntu0.14.04.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart applications
using graphite2, such as LibreOffice, to make all the necessary changes.

References

CVE-2016-1977, CVE-2016-2790, CVE-2016-2791, CVE-2016-2792, CVE-2016-2793, CVE-2016-2794, CVE-2016-2795, CVE-2016-2796, CVE-2016-2797, CVE-2016-2798, CVE-2016-2799, CVE-2016-2800, CVE-2016-2801, CVE-2016-2802