(Gentoo Issues Fix for pdftohtml) Xpdf Buffer Overflow in doImage() Lets Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1012816 |
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SecurityTracker URL: http://securitytracker.com/id/1012816
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CVE Reference:
CAN-2004-1125
(Links to External Site)
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Date: Jan 10 2005
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Impact:
Execution of arbitrary code via network, User access via network
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Fix Available: Yes Vendor Confirmed: Yes
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Description:
iDEFENSE reported a buffer overflow vulnerability in Xpdf. A remote user can cause arbitrary code to be executed on the target user's system. pdftohtml is affected.
It is reported that a remote user can create a specially crafted PDF file that, when viewed by the target user, will trigger an overflow and execute arbitrary code with the privileges of the target user.
The flaw resides in the Gfx::doImage() function in 'xpdf/Gfx.cc', where the maskColors array can be overflowed.
The vendor was notified on November 23, 2004.
The original advisory is available at:
http://www.idefense.com/application/poi/display?id=172&type=vulnerabilities
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Impact:
A remote user can create a specially crafted PDF file that, when viewed by the target user, will execute arbitrary code on the target user's system. The code will run with the privileges of the target user.
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Solution:
Gentoo has released a fix for pdftohtml, which is affected by the Xpdf vulnerability.
All pdftohtml users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/pdftohtml-0.36-r2"
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Vendor URL: pdftohtml.sourceforge.net/ (Links to External Site)
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Cause:
Boundary error
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Underlying OS:
Linux (Gentoo)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Mon, 10 Jan 2005 10:15:26 +0100
Subject: [gentoo-announce] [ GLSA 200501-13 ] pdftohtml: Vulnerabilities in included Xpdf
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
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Gentoo Linux Security Advisory GLSA 200501-13
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http://security.gentoo.org/
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Severity: Normal
Title: pdftohtml: Vulnerabilities in included Xpdf
Date: January 10, 2005
Bugs: #75200
ID: 200501-13
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Synopsis
========
pdftohtml includes vulnerable Xpdf code to handle PDF files, making it
vulnerable to execution of arbitrary code upon converting a malicious
PDF file.
Background
==========
pdftohtml is a utility to convert PDF files to HTML or XML formats. It
makes use of Xpdf code to decode PDF files.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-text/pdftohtml < 0.36-r2 >= 0.36-r2
Description
===========
Xpdf is vulnerable to integer overflows, as described in GLSA
200412-24.
Impact
======
An attacker could entice a user to convert a specially-crafted PDF
file, potentially resulting in the execution of arbitrary code with the
rights of the user running pdftohtml.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All pdftohtml users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/pdftohtml-0.36-r2"
References
==========
[ 1 ] GLSA 200412-24
http://www.gentoo.org/security/en/glsa/glsa-200410-20.xml
[ 2 ] CAN-2004-1125
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1125
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200501-13.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@gentoo.org 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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