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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200609-07">
<title>LibXfont, monolithic X.org: Multiple integer overflows</title>
<synopsis>
Some buffer overflows were discovered in the CID font parser, potentially
resulting in the execution of arbitrary code with elevated privileges.
</synopsis>
<product type="ebuild">libxfont</product>
<announced>September 13, 2006</announced>
<revised>September 13, 2006: 01</revised>
<bug>145513</bug>
<access>local and remote</access>
<affected>
<package name="x11-libs/libXfont" auto="yes" arch="*">
<unaffected range="ge">1.2.1</unaffected>
<vulnerable range="lt">1.2.1</vulnerable>
</package>
<package name="x11-base/xorg-x11" auto="yes" arch="*">
<unaffected range="ge">7.0</unaffected>
<vulnerable range="lt">7.0</vulnerable>
</package>
</affected>
<background>
<p>
libXfont is the X.Org Xfont library, some parts are based on the
FreeType code base.
</p>
</background>
<description>
<p>
Several integer overflows have been found in the CID font parser.
</p>
</description>
<impact type="high">
<p>
A remote attacker could exploit this vulnerability by enticing a user
to load a malicious font file resulting in the execution of arbitrary
code with the permissions of the user running the X server which
typically is the root user. A local user could exploit this
vulnerability to gain elevated privileges.
</p>
</impact>
<workaround>
<p>
Disable CID-encoded Type 1 fonts by removing the "type1" module and
replacing it with the "freetype" module in xorg.conf.
</p>
</workaround>
<resolution>
<p>
All libXfont users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=x11-libs/libXfont-1.2.1&quot;</code>
<p>
All monolithic X.org users are advised to migrate to modular X.org.
</p>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=2006-3739">CVE-2006-3739</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=2006-3740">CVE-2006-3740</uri>
</references>
<metadata tag="requester" timestamp="Tue, 12 Sep 2006 16:30:32 +0000">
frilled
</metadata>
<metadata tag="submitter" timestamp="Tue, 12 Sep 2006 18:16:51 +0000">
jaervosz
</metadata>
<metadata tag="bugReady" timestamp="Wed, 13 Sep 2006 08:07:36 +0000">
jaervosz
</metadata>
</glsa>