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                     Secunia Research 16/10/2007

  - IrfanView Palette File Importing Buffer Overflow Vulnerability -

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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

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1) Affected Software 

IrfanView 3.99 and 4.00

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Moderately critical
Impact: System access
Where:  From remote

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3) Vendor's Description of Software 

"IrfanView is a very fast, small, compact and innovative FREEWARE
(for non-commercial use) graphic viewer for Windows 9x/ME/NT/2000/
XP/2003/Vista. It is trying to be simple for beginners and powerful
for professionals.".

Product Link:
http://www.irfanview.com/

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4) Description of Vulnerability

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

The vulnerability is caused due to a boundary error when importing
palette (*.pal) files. This can be exploited to cause a stack-based
buffer overflow by tricking a user into importing a specially crafted
palette (*.pal) file.

Successful exploitation allows the execution of arbitrary code.

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5) Solution 

Update to version 4.10.
http://www.irfanview.com/main_download_engl.htm

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6) Time Table 

28/08/2007 - Vendor notified.
28/08/2007 - Vendor response.
16/10/2007 - Public disclosure.

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7) Credits 

Discovered by Stefan Cornelius, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2007-4343 for the vulnerability.

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9) About Secunia

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

http://corporate.secunia.com/

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/

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://corporate.secunia.com/secunia_research/33/

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

http://secunia.com/secunia_vacancies/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/secunia_security_advisories/ 

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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2007-71/

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

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