(RHSA-2010:0401) Moderate: tetex security update

teTeX is an implementation of TeX. TeX takes a text file and a set of
formatting commands as input, and creates a typesetter-independent DeVice
Independent (DVI) file as output.

A buffer overflow flaw was found in the way teTeX processed virtual font
files when converting DVI files into PostScript. An attacker could create a
malicious DVI file that would cause the dvips executable to crash or,
potentially, execute arbitrary code. (CVE-2010-0827)

Multiple integer overflow flaws were found in the way teTeX processed
special commands when converting DVI files into PostScript. An attacker
could create a malicious DVI file that would cause the dvips executable to
crash or, potentially, execute arbitrary code. (CVE-2010-0739,
CVE-2010-1440)

A stack-based buffer overflow flaw was found in the way teTeX processed DVI
files containing HyperTeX references with long titles, when converting them
into PostScript. An attacker could create a malicious DVI file that would
cause the dvips executable to crash. (CVE-2007-5935)

teTeX embeds a copy of Xpdf, an open source Portable Document Format (PDF)
file viewer, to allow adding images in PDF format to the generated PDF
documents. The following issues affect Xpdf code:

Multiple integer overflow flaws were found in Xpdf. If a local user
generated a PDF file from a TeX document, referencing a specially-crafted
PDF file, it would cause Xpdf to crash or, potentially, execute arbitrary
code with the privileges of the user running pdflatex. (CVE-2009-0791,
CVE-2009-3609)

All users of tetex are advised to upgrade to these updated packages, which
contain backported patches to correct these issues.