Blender: Untrusted search path

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 201001-07 / blender
Release Date	January 13, 2010
Latest Revision	January 13, 2010: 01
Impact	normal
Exploitable	local

Package	Vulnerable versions	Unaffected versions	Architecture(s)
media-gfx/blender	< 2.48a-r3	>= 2.48a-r3	All supported architectures

Related bugreports: #245310

Synopsis

An untrusted search path vulnerability in Blender might result in the execution of arbitrary code.

2. Impact Information

Background

Blender is a 3D Creation/Animation/Publishing System.

Description

Steffen Joeris reported that Blender's BPY_interface calls PySys_SetArgv() in such a way that Python prepends sys.path with an empty string.

Impact

A local attacker could entice a user to run "blender" from a directory containing a specially crafted Python module, resulting in the execution of arbitrary code with the privileges of the user running the application.

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-2.48a-r3"

4. References

CVE-2008-4863

Page updated January 13, 2010

Summary: This is a Gentoo Linux Security Advisory

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