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Gentoo Linux Security Advisory GLSA 200501-28
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http://security.gentoo.org/
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Severity: Normal
Title: Xpdf, GPdf: Stack overflow in Decrypt::makeFileKey2
Date: January 21, 2005
Bugs: #77888, #78128
ID: 200501-28
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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.
Background
==========
Xpdf is an open source viewer for Portable Document Format (PDF) files.
GPdf is a Gnome-based PDF viewer that includes some Xpdf code.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-text/xpdf <= 3.00-r7 >= 3.00-r8
2 app-text/gpdf < 2.8.2 >= 2.8.2
-------------------------------------------------------------------
2 affected packages on all of their supported architectures.
-------------------------------------------------------------------
Description
===========
iDEFENSE reports that the Decrypt::makeFileKey2 function in Xpdf's
Decrypt.cc insufficiently checks boundaries when processing /Encrypt
/Length tags in PDF files.
Impact
======
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.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Xpdf users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/xpdf-3.00-r8"
All GPdf users should also upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/gpdf-2.8.2"
References
==========
[ 1 ] CAN-2005-0064
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0064
[ 2 ] iDEFENSE Advisory
http://www.idefense.com/application/poi/display?id=186&type=vulnerabilities&flashstatus=true
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200501-28.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@xxxxxxxxxx or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2005 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.0
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