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Xpdf JBIG2 Symbol Dictionary Buffer Overflow

Xpdf JBIG2 Symbol Dictionary Buffer Overflow
Posted Apr 17, 2009
Authored by Alin Rad Pop | Site secunia.com

Secunia Research has discovered a vulnerability in Xpdf, which can be exploited by malicious people to potentially compromise a user's system. The vulnerability is caused due to a boundary error while decoding JBIG2 symbol dictionary segments. This can be exploited to cause a heap-based buffer overflow via a specially crafted PDF file. Successful exploitation may allow execution of arbitrary code. Xpdf version 3.02pl2 is affected.

tags | advisory, overflow, arbitrary
advisories | CVE-2009-0195
SHA-256 | fa077be3403b3929a797bfc8071d7acf1a0ec98e5d1dda45ab503f0dff7e7e5c

Xpdf JBIG2 Symbol Dictionary Buffer Overflow

Change Mirror Download
====================================================================== 

Secunia Research 17/04/2009

- Xpdf JBIG2 Symbol Dictionary Buffer Overflow Vulnerability -

======================================================================
Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

======================================================================
1) Affected Software

* Xpdf 3.02pl2

NOTE: Prior versions may also be affected.

======================================================================
2) Severity

Rating: Highly critical
Impact: System access
Where: Remote

======================================================================
3) Vendor's Description of Software

"Xpdf is an open source viewer for Portable Document Format (PDF)
files. (These are also sometimes also called 'Acrobat' files, from the
name of Adobe's PDF software.) The Xpdf project also includes a PDF
text extractor, PDF-to-PostScript converter, and various other
utilities.".

Product Link:
http://www.foolabs.com/xpdf/

======================================================================
4) Description of Vulnerability

Secunia Research has discovered a vulnerability in Xpdf, which can be
exploited by malicious people to potentially compromise a user's
system.

The vulnerability is caused due to a boundary error while decoding
JBIG2 symbol dictionary segments. This can be exploited to cause a
heap-based buffer overflow via a specially crafted PDF file.

Successful exploitation may allow execution of arbitrary code.

======================================================================
5) Solution

Apply xpdf-3.02pl3.patch.

======================================================================
6) Time Table

26/03/2009 - Vendor notified.
26/03/2009 - vendor-sec notified.
27/03/2009 - Vendor response.
17/04/2009 - Public disclosure.

======================================================================
7) Credits

Discovered by Alin Rad Pop, Secunia Research.

======================================================================
8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2009-0195 for the vulnerability.

======================================================================
9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://secunia.com/advisories/business_solutions/

Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private
individuals, who are interested in or concerned about IT-security.

http://secunia.com/advisories/

Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the
security and reliability of software in general:

http://secunia.com/secunia_research/

Secunia regularly hires new skilled team members. Check the URL below
to see currently vacant positions:

http://secunia.com/corporate/jobs/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/advisories/mailing_lists/

======================================================================
10) Verification

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2009-17/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

======================================================================

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