graphviz - buffer overflow

Two buffer overflow vulnerabilities were reported in Graphviz, a rich
collection of graph drawing tools. The Common Vulnerabilities and
Exposures project identifies the following issues:

• CVE-2014-0978
  It was discovered that user-supplied input used in the yyerror()
  function in lib/cgraph/scan.l is not bound-checked before beeing
  copied into an insufficiently sized memory buffer. A
  context-dependent attacker could supply a specially crafted input
  file containing a long line to cause a stack-based buffer overlow,
  resulting in a denial of service (application crash) or potentially
  allowing the execution of arbitrary code.
• CVE-2014-1236
  Sebastian Krahmer reported an overflow condition in the chkNum()
  function in lib/cgraph/scan.l that is triggered as the used regular
  expression accepts an arbitrary long digit list. With a specially
  crafted input file, a context-dependent attacker can cause a
  stack-based buffer overflow, resulting in a denial of service
  (application crash) or potentially allowing the execution of
  arbitrary code.

For the oldstable distribution (squeeze), these problems have been fixed in
version 2.26.3-5+squeeze2.

For the stable distribution (wheezy), these problems have been fixed in
version 2.26.3-14+deb7u1.

For the unstable distribution (sid), these problems will be fixed soon.

We recommend that you upgrade your graphviz packages.