USN-2726-1: Expat vulnerability

Ubuntu Security Notice USN-2726-1

31st August, 2015

expat vulnerability

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

  • Ubuntu 15.04
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS


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

Software description

  • expat - XML parsing C library


It was discovered that Expat incorrectly handled malformed XML data. If a
user or application linked against Expat were tricked into opening a
crafted XML file, an attacker could cause 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 15.04:
libexpat1 2.1.0-6ubuntu1.1
lib64expat1 2.1.0-6ubuntu1.1
Ubuntu 14.04 LTS:
libexpat1 2.1.0-4ubuntu1.1
lib64expat1 2.1.0-4ubuntu1.1
Ubuntu 12.04 LTS:
libexpat1 2.0.1-7.2ubuntu1.2
lib64expat1 2.0.1-7.2ubuntu1.2

To update your system, please follow these instructions:

After a standard system upgrade you need to restart any applications linked
against Expat to effect the necessary changes.