libxfont - security update

Ilja van Sprundel of IOActive discovered several security issues in the
X.Org libXfont library, which may allow a local, authenticated user to
attempt to raise privileges; or a remote attacker who can control the
font server to attempt to execute code with the privileges of the X
server.

• CVE-2014-0209
  Integer overflow of allocations in font metadata file parsing could
  allow a local user who is already authenticated to the X server to
  overwrite other memory in the heap.
• CVE-2014-0210
  libxfont does not validate length fields when parsing xfs protocol
  replies allowing to write past the bounds of allocated memory when
  storing the returned data from the font server.
• CVE-2014-0211
  Integer overflows calculating memory needs for xfs replies could
  result in allocating too little memory and then writing the returned
  data from the font server past the end of the allocated buffer.

For the oldstable distribution (squeeze), these problems have been fixed in
version 1:1.4.1-5.

For the stable distribution (wheezy), these problems have been fixed in
version 1:1.4.5-4.

For the unstable distribution (sid), these problems have been fixed in
version 1:1.4.7-2.

We recommend that you upgrade your libxfont packages.