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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200501-28">
<title>Xpdf, GPdf: Stack overflow in Decrypt::makeFileKey2</title>
<synopsis>
A stack overflow was discovered in Xpdf, potentially resulting in the
execution of arbitrary code. GPdf includes Xpdf code and therefore is
vulnerable to the same issue.
</synopsis>
<product type="ebuild">Xpdf</product>
<announced>January 21, 2005</announced>
<revised>January 21, 2005: 01</revised>
<bug>77888</bug>
<bug>78128</bug>
<access>remote</access>
<affected>
<package name="app-text/xpdf" auto="yes" arch="*">
<unaffected range="ge">3.00-r8</unaffected>
<vulnerable range="le">3.00-r7</vulnerable>
</package>
<package name="app-text/gpdf" auto="yes" arch="*">
<unaffected range="ge">2.8.2</unaffected>
<vulnerable range="lt">2.8.2</vulnerable>
</package>
</affected>
<background>
<p>
Xpdf is an open source viewer for Portable Document Format (PDF)
files. GPdf is a Gnome-based PDF viewer that includes some Xpdf code.
</p>
</background>
<description>
<p>
iDEFENSE reports that the Decrypt::makeFileKey2 function in Xpdf's
Decrypt.cc insufficiently checks boundaries when processing /Encrypt
/Length tags in PDF files.
</p>
</description>
<impact type="normal">
<p>
An attacker could entice an user to open a specially-crafted PDF
file which would trigger a stack overflow, potentially resulting in
execution of arbitrary code with the rights of the user running Xpdf or
GPdf.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All Xpdf users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=app-text/xpdf-3.00-r8&quot;</code>
<p>
All GPdf users should also upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=app-text/gpdf-2.8.2&quot;</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0064">CAN-2005-0064</uri>
<uri link="http://www.idefense.com/application/poi/display?id=186&amp;type=vulnerabilities&amp;flashstatus=true">iDEFENSE Advisory</uri>
</references>
<metadata tag="submitter" timestamp="Tue, 18 Jan 2005 13:34:11 +0000">
koon
</metadata>
<metadata tag="bugReady" timestamp="Fri, 21 Jan 2005 20:37:01 +0000">
koon
</metadata>
</glsa>