USN-4132-1 fixed a vulnerability in Expat. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
Original advisory details:
It was discovered that Expat incorrectly handled certain XML files. An attacker could possibly use this issue to expose sensitive information.
{ "availability": "No subscription required", "binaries": [ { "libexpat1-udeb": "2.1.0-4ubuntu1.4+esm2", "expat": "2.1.0-4ubuntu1.4+esm2", "libexpat1-dev": "2.1.0-4ubuntu1.4+esm2", "lib64expat1-dev": "2.1.0-4ubuntu1.4+esm2", "libexpat1": "2.1.0-4ubuntu1.4+esm2", "lib64expat1": "2.1.0-4ubuntu1.4+esm2" } ] }