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Blender "get_bhead()" Integer Overflow and "bvh_import.py" Vulnerabilities
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Secunia Advisory:
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SA18176
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Release Date:
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2005-12-21
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Last Update:
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2006-04-24
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Critical:
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Moderately critical
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Impact:
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DoS
System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | Blender 2.x
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| | CVE reference: | CVE-2005-3302 (Secunia mirror)
CVE-2005-4470 (Secunia mirror)
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Description:
Two vulnerabilities have been reported in Blender, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially to compromise a user's system.
1) An integer overflow error exists within the "get_bhead()" function in "readfile.c" when parsing ".blend" files. This can be exploited to cause a heap based buffer overflow by tricking a user into opening a specially crafted ".blend" file.
Successful exploitation may allow execution of arbitrary code.
The vulnerability has been reported in versions 2.x through 2.40pre. Other versions may also be affected.
2) An insecure use of the "eval()" function exists in bvh_import.py. This can be exploited to execute arbitrary python code by tricking the user to import a malicious ".bvh" file that contains a hierarchy element.
The vulnerability has been reported in version 2.36. Prior versions may also be affected.
Solution:
Update to version 2.40.
http://www.blender.org/cms/Blender.31.0.html
Provided and/or discovered by:
1) Damian Put
2) Joxean Koret
Changelog:
2006-01-06: Added CVE reference.
2006-01-09: Updated "Solution" section.
2006-04-24: Added information of additional vulnerability.
Original Advisory:
http://www.overflow.pl/adv/blenderinteger.txt
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=330895
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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4 Related Secunia Security Advisories
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1. Blender Multiple Temporary File Security Issues
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2. Blender "imb_loadhdr()" Buffer Overflow Vulnerability
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3. Blender KML/KMZ Import Command Injection Vulnerability
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4. Blender Command Line Buffer Overflow Vulnerability
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