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.

Graph drawing addresses the problem of visualizing structural information by constructing geometric representations of abstract graphs and networks. Automatic generation of graph drawings has important applications in key technologies such as database design, software engineering, VLSI and network design and visual interfaces in other domains. Situations where these tools might be particularly useful include:

graphviz on Debian Linux

This check tests the installed software version using the apt package manager.

• http://www.debian.org/security/2014/dsa-2843.html

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Updated on 2015-03-25