expat - security update

Two related issues have been discovered in Expat, a C library for
parsing XML.

• CVE-2012-6702
  This issue was introduced when CVE-2012-0876 was addressed. Stefan
  Sørensen discovered that the use of the function XML_Parse() seeds
  the random number generator generating repeated outputs for rand()
  calls.
• CVE-2016-5300
  This is the product of an incomplete solution for CVE-2012-0876. The
  parser poorly seeds the random number generator allowing an
  attacker to cause a denial of service (CPU consumption) via an XML
  file with crafted identifiers.

You might need to manually restart programs and services using expat
libraries.

For Debian 7 Wheezy, these problems have been fixed in version
2.1.0-1+deb7u4.

We recommend that you upgrade your expat packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: <https://wiki.debian.org/LTS&gt;