=====================================================================
Secunia Research 30/01/2008
- XnView, NConvert, and GFL SDK Radiance RGBE Buffer Overflow -
======================================================================
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
* XnView 1.91, XnView 1.92
* NConvert 4.85
* GFL SDK 2.870
NOTE: Other versions may also be affected.
======================================================================
2) Severity
Rating: Highly critical
Impact: System access
Where: From remote
======================================================================
3) Vendor's Description of Software
XnView:
"A software to view and convert graphic files, really simple to use!"
Product Link:
http://pagesperso-orange.fr/pierre.g/xnview/enhome.html
NConvert:
"Come to discover NConvert, a batch utility to convert graphic files!"
Product Link:
http://pagesperso-orange.fr/pierre.g/xnview/en_nconvert.html
GFL SDK:
"GFL SDK is a free library (used by XnView) for developers who would
like to support graphics image formats easily."
Product Link:
http://pagesperso-orange.fr/pierre.g/xnview/engfl.html
======================================================================
4) Description of Vulnerability
Secunia Research has discovered a vulnerability in XnView, NConvert,
and GFL SDK, which can be exploited by malicious people to compromise
a user's system.
The vulnerability is cause due to a boundary error when reading
Radiance RGBE (*.hdr) files. This can be exploited to cause a
stack-based buffer overflow by e.g. tricking a user into viewing a
specially crafted Radiance RGBE file.
Successful exploitation allows execution of arbitrary code.
======================================================================
5) Solution
XnView:
Update to version 1.92.1.
NConvert:
Update to version 4.86.
GFL SDK:
Currently, no updated version is available.
======================================================================
6) Time Table
04/01/2008 - Vendor notified.
04/01/2008 - Vendor response.
29/01/2008 - Vendor releases updated versions of XnView and NConvert.
30/01/2008 - Public disclosure.
======================================================================
7) Credits
Discovered by Stefan Cornelius, Secunia Research.
======================================================================
8) References
The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2008-0064 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://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/
======================================================================
10) Verification
Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2008-01/
Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/
======================================================================
|