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Category:   Application (Generic)  >   Xpdf Vendors:   Glyph and Cog
Xpdf Buffer Overflows in Processing DCT and JPX Streams May Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1015309
SecurityTracker URL:  http://securitytracker.com/id/1015309
CVE Reference:   CVE-2005-3191, CVE-2005-3192   (Links to External Site)
Date:  Dec 5 2005
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 3.0.1
Description:   Several vulnerabilities were reported in Xpdf. A remote user may be able to cause arbitrary code to be executed on the target system.

The DCT stream parsing code does not properly validate user-supplied input. The DCTStream::readBaselineSOF() function in 'xpdf/Stream.cc' does not properly validate the 'numComps' parameter. A remote user can create a specially crafted PDF file that, when processed by the target user, will trigger an overflow at potentially execute arbitrary code.

The DCTStream::readProgressiveSOF() and StreamPredictor::StreamPredictor() functions are also affected.

A similar overflow exists in the JPX Stream parsing code used in decoding embedded JPEG 2000 images. The JPXStream::readCodestream() function in 'xpdf/JPXStream.cc' does not properly validate the 'nXTiles' and 'nYTiles' parameters.

The vendor was notified on October 13, 2005.

iDEFENSE reported these vulnerabilities.

The original advisories are available at:

http://www.idefense.com/application/poi/display?id=342&type=vulnerabilities
http://www.idefense.com/application/poi/display?id=343&type=vulnerabilities
http://www.idefense.com/application/poi/display?id=344&type=vulnerabilities
http://www.idefense.com/application/poi/display?id=345&type=vulnerabilities

Impact:   A remote user can create a specially crafted PDF file that, when processed by the target user, may be able to cause arbitrary code to be executed on the target system with the privileges of the target user.
Solution:   The vendor has issued a patch, available at:

ftp://ftp.foolabs.com/pub/xpdf/xpdf-3.01pl1.patch

Also, a fixed version (version 3.01pl1) is available at:

http://www.foolabs.com/xpdf/download.html

Vendor URL:  www.foolabs.com/xpdf/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Dec 8 2005 (Red Hat Issues Fix) Xpdf Buffer Overflows in Processing DCT and JPX Streams May Let Remote Users Execute Arbitrary Code
Red Hat has released a fix for Red Hat Enterprise Linux 2.1, 3, and 4.
Dec 20 2005 (Red Hat Issues Fix) Xpdf Buffer Overflows in Processing DCT and JPX Streams May Let Remote Users Execute Arbitrary Code
Red Hat has released a fix for Red Hat Enterprise Linux 2.1, 3, and 4.
Dec 21 2005 (Red Hat Issues Fix for gpdf) Xpdf Buffer Overflows in Processing DCT and JPX Streams May Let Remote Users Execute Arbitrary Code
Red Hat has released a fix for gpdf on Red Hat Enterprise Linux 4.



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