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Ubuntu 16.04 LTS: USN-3063-1 Critical Fontconfig Exploit

ubuntu
Calendar Grey August 17, 2016
Scroller Ubuntu
A vulnerability in fontconfig can enable local attackers to manipulate cache files, compromising Ubuntu versions 16.04, 14.04, and 12.04 LTS.
Fontconfig be made to crash or run programs if it opened a specially crafted file.

Summary

Fontconfig be made to crash or run programs if it opened a specially

crafted file.

Software Description:

- fontconfig: generic font configuration library

Details:

Tobias Stoeckmann discovered that Fontconfig incorrectly handled cache

files. A local attacker could possibly use this issue with a specially

crafted cache file to elevate privileges.

Topics%20covered

Topics Covered

security advisory critical privilege escalation ubuntu fontconfig

Update Instructions

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

Ubuntu 16.04 LTS:
  fontconfig                      2.11.94-0ubuntu1.1
  libfontconfig1                  2.11.94-0ubuntu1.1

Ubuntu 14.04 LTS:
  fontconfig                      2.11.0-0ubuntu4.2
  libfontconfig1                  2.11.0-0ubuntu4.2

Ubuntu 12.04 LTS:
  fontconfig                      2.8.0-3ubuntu9.2
  libfontconfig1                  2.8.0-3ubuntu9.2

After a standard system update you need to restart your session to make
all the necessary changes.

References

https://ubuntu.com/security/notices/USN-3063-1

CVE-2016-5384

Severity
critical
Lowest
Low
Medium
High
Critical

August 17, 2016

Topics%20covered

Topics Covered

security advisory critical privilege escalation ubuntu fontconfig

Package Information

https://launchpad.net/ubuntu/+source/fontconfig/2.11.94-0ubuntu1.1
https://launchpad.net/ubuntu/+source/fontconfig/2.11.0-0ubuntu4.2
https://launchpad.net/ubuntu/+source/fontconfig/2.8.0-3ubuntu9.2

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