TITLE:
Blender "get_bhead()" Integer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA18176

VERIFY ADVISORY:
http://secunia.com/advisories/18176/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
Blender 2.x
http://secunia.com/product/5780/

DESCRIPTION:
Damian Put has reported a vulnerability in Blender, which can be
exploited by malicious people to cause a DoS (Denial of Service) or
to potentially compromise a user's system.

The vulnerability is caused due to an integer overflow in
"get_bhead()" 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.

SOLUTION:
Do not open ".blend" files from untrusted sources.

PROVIDED AND/OR DISCOVERED BY:
Damian Put

ORIGINAL ADVISORY:
http://www.overflow.pl/adv/blenderinteger.txt

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