graphicsmagick - security update

Various security issues were found and fixed in graphicsmagick in Debian
wheezy LTS.

• CVE-2016-7446
  Heap buffer overflow issue in MVG/SVG rendering.
• CVE-2016-7447
  Heap overflow of the EscapeParenthesis() function
• CVE-2016-7449
  TIFF related problems due to use of strlcpy use.
• CVE-2016-7800
  Fix unsigned underflow leading to heap overflow when
  parsing 8BIM chunk.

For Debian 7 Wheezy, these problems have been fixed in version
1.3.16-1.1+deb7u4.

We recommend that you upgrade your graphicsmagick 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;