Ubuntu Security Notice USN-2098-2
13th February, 2014
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 13.10
- Ubuntu 12.10
- Ubuntu 12.04 LTS
USN-2098-1 introduced a regression in LibYAML.
- libyaml - Fast YAML 1.1 parser and emitter library
USN-2098-1 fixed a vulnerability in LibYAML. The security fix used
introduced a regression that caused parsing failures for certain valid YAML
files. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Florian Weimer discovered that LibYAML incorrectly handled certain large
yaml documents. An attacker could use this issue to cause LibYAML to crash,
resulting in a denial of service, or possibly execute arbitrary code.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 13.10:
- libyaml-0-2 0.1.4-2ubuntu0.13.10.2
- Ubuntu 12.10:
- libyaml-0-2 0.1.4-2ubuntu0.12.10.2
- Ubuntu 12.04 LTS:
- libyaml-0-2 0.1.4-2ubuntu0.12.04.2
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart applications using
LibYAML to make all the necessary changes.