Debian: DSA-2843-1: graphviz security update
Summary
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.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org