Moderate: ghostscript security update

Updated ghostscript packages that fix multiple security issues are now
available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

Ghostscript is a set of software that provides a PostScript interpreter, a
set of C procedures (the Ghostscript library, which implements the graphics
capabilities in the PostScript language) and an interpreter for Portable
Document Format (PDF) files.

It was discovered that the Red Hat Security Advisory RHSA-2009:0345 did not
address all possible integer overflow flaws in Ghostscript's International
Color Consortium Format library (icclib). Using specially-crafted ICC
profiles, an attacker could create a malicious PostScript or PDF file with
embedded images that could cause Ghostscript to crash or, potentially,
execute arbitrary code when opened. (CVE-2009-0792)

A buffer overflow flaw and multiple missing boundary checks were found in
Ghostscript. An attacker could create a specially-crafted PostScript or PDF
file that could cause Ghostscript to crash or, potentially, execute
arbitrary code when opened. (CVE-2008-6679, CVE-2007-6725, CVE-2009-0196)

Red Hat would like to thank Alin Rad Pop of Secunia Research for
responsibly reporting the CVE-2009-0196 flaw.

Users of ghostscript are advised to upgrade to these updated packages,
which contain backported patches to correct these issues.

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

491853 - CVE-2009-0792 ghostscript, argyllcms: Incomplete fix for CVE-2009-0583
493379 - CVE-2009-0196 ghostscript: Missing boundary check in Ghostscript's jbig2dec library
493442 - CVE-2007-6725 ghostscript: DoS (crash) in CCITTFax decoding filter
493445 - CVE-2008-6679 ghostscript: Buffer overflow in BaseFont writer module for pdfwrite defice

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6725
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-6679
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0196
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0792
http://www.redhat.com/security/updates/classification/#moderate