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Category:   Application (Generic)  >   teTeX Vendors:   Esser, Thomas
(Fedora Issues Fix for TeTex) Xpdf Buffer Overflow in doImage() Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1012760
SecurityTracker URL:  http://securitytracker.com/id/1012760
CVE Reference:   CVE-2004-1125   (Links to External Site)
Updated:  Jan 4 2005
Original Entry Date:  Jan 3 2005
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

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. TeTex 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

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.
Solution:   Fedora has released a fix, available at:

http://download.fedora.redhat.com/pub/fedora/linux/core/updates/3/

bed96f12e8b704ab17f565ff04a7c4f9 SRPMS/tetex-2.0.2-21.2.src.rpm
2fb48ee61a8ece3bc8a10dda310346b8 x86_64/tetex-2.0.2-21.2.x86_64.rpm
eff9c7833844595b3cd7e64debdbd7eb x86_64/tetex-latex-2.0.2-21.2.x86_64.rpm
dd14c8de2086063383d11e5b53e537af x86_64/tetex-xdvi-2.0.2-21.2.x86_64.rpm
38e520d0ae06f09b3317ce26ed0e1aeb x86_64/tetex-dvips-2.0.2-21.2.x86_64.rpm
0e739680d044d73882ff0731b26f378f x86_64/tetex-afm-2.0.2-21.2.x86_64.rpm
36e18f7405ce3fb7b54e3fa639de11b4 x86_64/tetex-fonts-2.0.2-21.2.x86_64.rpm
929fee56d78fe31605b32861258fd827 x86_64/tetex-doc-2.0.2-21.2.x86_64.rpm
92a801ec36ca13de833208b712b87acd x86_64/debug/tetex-debuginfo-2.0.2-21.2.x86_64.rpm
5efacdad82d61ed25030269b6c89abfe i386/tetex-2.0.2-21.2.i386.rpm
e249065b4ff83339a52cf4ee67b5931d i386/tetex-latex-2.0.2-21.2.i386.rpm
aee5e12bc7c8349ab06f0f3ebe8eab5f i386/tetex-xdvi-2.0.2-21.2.i386.rpm
14ea742121160307adbbcf37c4a3401a i386/tetex-dvips-2.0.2-21.2.i386.rpm
49967d06270603a146d9f8d27eaaf08c i386/tetex-afm-2.0.2-21.2.i386.rpm
569591b26e0cab205c87f112756212c9 i386/tetex-fonts-2.0.2-21.2.i386.rpm
7ec42e9568ec05ed17b5ad708286bd0d i386/tetex-doc-2.0.2-21.2.i386.rpm
d9483991ce1585e0d1cb4999bf4c8bec i386/debug/tetex-debuginfo-2.0.2-21.2.i386.rpm

Vendor URL:  www.tug.org/teTeX/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Red Hat Fedora)
Underlying OS Comments:  FC3

Message History:   This archive entry is a follow-up to the message listed below.
Dec 21 2004 Xpdf Buffer Overflow in doImage() Lets Remote Users Execute Arbitrary Code



 Source Message Contents

Subject:  [SECURITY] Fedora Core 3 Update: tetex-2.0.2-21.2


---------------------------------------------------------------------
Fedora Update Notification
FEDORA-2004-585
2005-01-03
---------------------------------------------------------------------

Product     : Fedora Core 3
Name        : tetex
Version     : 2.0.2                      
Release     : 21.2                  
Summary     : The TeX text formatting system.
Description :
TeTeX is an implementation of TeX for Linux or UNIX systems. TeX takes
a text file and a set of formatting commands as input and creates a
typesetter-independent .dvi (DeVice Independent) file as output.
Usually, TeX is used in conjunction with a higher level formatting
package like LaTeX or PlainTeX, since TeX by itself is not very
user-friendly.

Install tetex if you want to use the TeX text formatting system. If
you are installing tetex, you will also need to install tetex-afm (a
PostScript(TM) font converter for TeX),
tetex-dvips (for converting .dvi files to PostScript format
for printing on PostScript printers), tetex-latex (a higher level
formatting package which provides an easier-to-use interface for TeX),
and tetex-xdvi (for previewing .dvi files in X). Unless you are an
expert at using TeX, you should also install the tetex-doc package,
which includes the documentation for TeX.

---------------------------------------------------------------------
Update Information:

The updated tetex package fixes a buffer overflow which allows attackers
to cause the internal xpdf library used by applications in tetex to
crash,
and possibly to execute arbitrary code.  The Common Vulnerabilities and
Exposures projects (cve.mitre.org) has assigned the name CAN-2004-1125 
to this issue.

---------------------------------------------------------------------
* Mon Dec 27 2004 Jindrich Novy <jnovy@redhat.com> 2.0.2-21.2

- Fix CAN-2004-1125 xpdf overflow
---------------------------------------------------------------------
This update can be downloaded from:
  http://download.fedora.redhat.com/pub/fedora/linux/core/updates/3/

bed96f12e8b704ab17f565ff04a7c4f9  SRPMS/tetex-2.0.2-21.2.src.rpm
2fb48ee61a8ece3bc8a10dda310346b8  x86_64/tetex-2.0.2-21.2.x86_64.rpm
eff9c7833844595b3cd7e64debdbd7eb  x86_64/tetex-
latex-2.0.2-21.2.x86_64.rpm
dd14c8de2086063383d11e5b53e537af  x86_64/tetex-
xdvi-2.0.2-21.2.x86_64.rpm
38e520d0ae06f09b3317ce26ed0e1aeb  x86_64/tetex-
dvips-2.0.2-21.2.x86_64.rpm
0e739680d044d73882ff0731b26f378f  x86_64/tetex-afm-2.0.2-21.2.x86_64.rpm
36e18f7405ce3fb7b54e3fa639de11b4  x86_64/tetex-
fonts-2.0.2-21.2.x86_64.rpm
929fee56d78fe31605b32861258fd827  x86_64/tetex-doc-2.0.2-21.2.x86_64.rpm
92a801ec36ca13de833208b712b87acd  x86_64/debug/tetex-
debuginfo-2.0.2-21.2.x86_64.rpm
5efacdad82d61ed25030269b6c89abfe  i386/tetex-2.0.2-21.2.i386.rpm
e249065b4ff83339a52cf4ee67b5931d  i386/tetex-latex-2.0.2-21.2.i386.rpm
aee5e12bc7c8349ab06f0f3ebe8eab5f  i386/tetex-xdvi-2.0.2-21.2.i386.rpm
14ea742121160307adbbcf37c4a3401a  i386/tetex-dvips-2.0.2-21.2.i386.rpm
49967d06270603a146d9f8d27eaaf08c  i386/tetex-afm-2.0.2-21.2.i386.rpm
569591b26e0cab205c87f112756212c9  i386/tetex-fonts-2.0.2-21.2.i386.rpm
7ec42e9568ec05ed17b5ad708286bd0d  i386/tetex-doc-2.0.2-21.2.i386.rpm
d9483991ce1585e0d1cb4999bf4c8bec  i386/debug/tetex-
debuginfo-2.0.2-21.2.i386.rpm

This update can also be installed with the Update Agent; you can
launch the Update Agent with the 'up2date' command.  
---------------------------------------------------------------------





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