(KDE Issues Fix for kpdf) Xpdf Buffer Overflow in doImage() Lets Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1012663 |
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SecurityTracker URL: http://securitytracker.com/id/1012663
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CVE Reference:
CAN-2004-1125
(Links to External Site)
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Date: Dec 23 2004
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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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Version(s): 3.2 through 3.2.3, 3.3 through 3.3.2
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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. KDE's kpdf 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:
KDE has issued the following patches for kpdf, which is affected by this xpdf vulnerability.
Patch for KDE 3.2.3 is available from
ftp://ftp.kde.org/pub/kde/security_patches :
6f345c4b89f0bc27522f5d62bfd941cd post-3.2.3-kdegraphics-2.diff
Patch for KDE 3.3.2 is available from
ftp://ftp.kde.org/pub/kde/security_patches :
0ac92868d3b84284e54877e32cde521f post-3.3.2-kdegraphics.diff
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Vendor URL: www.kde.org/info/security/advisory-20041223-1.txt (Links to External Site)
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Cause:
Boundary error
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Underlying OS:
Linux (Any), UNIX (Any)
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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: Thu, 23 Dec 2004 02:49:56 -0500
Subject: http://www.kde.org/info/security/advisory-20041223-1.txt
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
KDE Security Advisory: kpdf Buffer Overflow Vulnerability
Original Release Date: 2004-12-23
URL: http://www.kde.org/info/security/advisory-20041223-1.txt
0. References
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1125
http://www.idefense.com/application/poi/display?id=172&type=vulnerabilities
1. Systems affected:
KDE 3.2 up to including KDE 3.2.3.
KDE 3.3 up to including KDE 3.3.2.
2. Overview:
kpdf, the KDE pdf viewer, shares code with xpdf. xpdf contains
a buffer overflow that can be triggered by a specially
crafted PDF file.
3. Impact:
Remotely supplied pdf files can be used to execute arbitrary
code on the client machine.
4. Solution:
Source code patches have been made available which fix these
vulnerabilities. Contact your OS vendor / binary package provider
for information about how to obtain updated binary packages.
5. Patch:
Patch for KDE 3.2.3 is available from
ftp://ftp.kde.org/pub/kde/security_patches :
6f345c4b89f0bc27522f5d62bfd941cd post-3.2.3-kdegraphics-2.diff
Patch for KDE 3.3.2 is available from
ftp://ftp.kde.org/pub/kde/security_patches :
0ac92868d3b84284e54877e32cde521f post-3.3.2-kdegraphics.diff
6. Time line and credits:
21/12/2004 KDE Security Team alerted by Matthias Geerdsen
22/12/2004 Patch from xpdf 3.00pl2 applied to KDE CVS and patches
prepared.
23/12/2004 Public disclosure.
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