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GIMP 2.6 Script-Fu Command Execution

GIMP 2.6 Script-Fu Command Execution
Posted Aug 17, 2012
Site reactionpenetrationtesting.co.uk

There is an arbitrary command execution vulnerability in the scriptfu network server console in the GIMP 2.6 branch. It is possible to use a python scriptfu command to run arbitrary operating-system commands and potentially take full control of the host.

tags | advisory, arbitrary, python
advisories | CVE-2012-4245
SHA-256 | 6bb8abc35df548c551fcf9ff102ee8db444b1e273993fe8a725e91885c36da04

GIMP 2.6 Script-Fu Command Execution

Change Mirror Download
Summary
=======

There is an arbitrary command execution vulnerability in the scriptfu
network server
console in the GIMP 2.6 branch. It is possible to use a python scriptfu
command to run
arbitrary operating-system commands and potentially take full control of the
host.

The advisory is posted here:
http://www.reactionpenetrationtesting.co.uk/GIMP-scriptfu-python-command-exe
cution.html

CVE number: CVE-2012-4245
Vendor homepage: http://www.gimp.org/
Vendor notified: 9/8/2012


Affected Products
=================

GIMP 2.6 branch (Windows or Linux builds)

Non-Affected Products
=====================

The Scriptfu network server component does not currently work in the GIMP
2.8 branch
(Windows or Linux builds).

Details
=======

There is an arbitrary command execution vulnerability in the scriptfu
network server
console in the GIMP 2.6 branch. It is possible to use a python scriptfu
command to run
arbitrary operating-system commands and potentially take full control of the
host.
The following command will write "foo" to "/tmp/owned":

(python-fu-eval 0 "file = open('/tmp/owned','w')\nfile.write('foo')")


Impact
======

Successful exploitation of the vulnerability may result in remote command
execution.

Solution
===========
No solution has been implemented at this stage apart from the workaround
below.

Workaround
===========

Do not enable the scriptfu network server.
The GIMP development team have stated that this component was not designed
with security
in mind and therefore should not be used in production environments.

Distribution
============

In addition to posting on the website, a text version of this notice
is posted to the following e-mail and Usenet news recipients.

* bugtraq () securityfocus com
* full-disclosure () lists grok org uk

Future updates of this advisory, if any, will be placed on the ReactionIS
corporate website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the URL below for any updates:

http://www.reactionpenetrationtesting.co.uk/GIMP-scriptfu-python-command-exe
cution.html

============================================================================
====


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