Blender: Heap-based buffer overflow

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200601-08 / blender
Release Date	January 13, 2006
Latest Revision	January 13, 2006: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
media-gfx/blender	< 2.40	>= 2.40	All supported architectures

Related bugreports: #118163

Synopsis

Blender is vulnerable to a buffer overflow that may be exploited by attackers to execute arbitrary code.

2. Impact Information

Background

Blender is an open source software for 3D modeling, animation, rendering, post-production, interactive creation and playback.

Description

Damian Put has reported a flaw due to an integer overflow in the "get_bhead()" function, leading to a heap overflow when processing malformed ".blend" files.

Impact

A remote attacker could entice a user into opening a specially crafted ".blend" file, resulting in the execution of arbitrary code with the permissions of the user running Blender.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Blender users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-gfx/blender-2.40"

4. References

CVE-2005-4470

Updated January 13, 2006

Summary: This is a Gentoo Linux Security Advisory

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