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                     Secunia Research 21/04/2008

      - Blender "imb_loadhdr()" 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 

Blender 2.45

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 

"Blender is the free open source 3D content creation suite, available
for all major operating systems under the GNU General Public License."

Product Link: http://www.blender.org/


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4) Description of Vulnerability

Secunia Research has discovered a vulnerability in Blender, which can
be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the
"imb_loadhdr()" function in source/blender/imbuf/intern/radiance_hdr.c,
which can be exploited to cause a stack-based buffer overflow by e.g.
tricking a user into opening a specially crafted Blender (*.blend)
file containing a malicious Radiance RGBE image.

Successful exploitation allows the execution of arbitrary code.

The vulnerability is confirmed in version 2.45. Other versions may
also be affected.


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5) Solution 

Fixed in the SVN repository.

Do not open untrusted Radiance RGBE (*.hdr) or Blender (*.blend)
files.

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6) Time Table 

14/04/2008 - Vendor notified.
15/04/2008 - Vendor response.
21/04/2008 - 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-2008-1102 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/2008-14/

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

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