Solution
Please Install the Updated Packages.
Insight
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.
Affected
libyaml on Ubuntu 13.10 ,
Ubuntu 12.10 ,
Ubuntu 12.04 LTS