Gallery 1.4.1 and below remote exploit vulnerability — GLSA 200402-04

The Gallery developers have discovered a potentially serious security flaw in Gallery 1.3.1, 1.3.2, 1.3.3, 1.4 and 1.4.1 which can allow a remote exploit of your webserver.

Affected Packages

www-apps/gallery on all architectures
Affected versions < 1.4.1_p1
Unaffected versions >= 1.4.1_p1

Background

Gallery is an open source image management system written in PHP. More information is available at http://gallery.sourceforge.net

Description

Starting in the 1.3.1 release, Gallery includes code to simulate the behaviour of the PHP 'register_globals' variable in environments where that setting is disabled. It is simulated by extracting the values of the various $HTTP_ global variables into the global namespace.

Impact

A crafted URL such as http://example.com/gallery/init.php?HTTP_POST_VARS=xxx causes the 'register_globals' simulation code to overwrite the $HTTP_POST_VARS which, when it is extracted, will deliver the given payload. If the payload compromises $GALLERY_BASEDIR then the malicious user can perform a PHP injection exploit and gain remote access to the webserver with PHP user UID access rights.

Workaround

The workaround for the vulnerability is to replace init.php and setup/init.php with the files in the following ZIP file: http://prdownloads.sourceforge.net/gallery/patch_1.4.1-to-1.4.1-pl1.zip?download

Resolution

All users are encouraged to upgrade their gallery installation:

 # emerge sync
 # emerge -p ">=www-apps/gallery-1.4.1_p1"
 # emerge ">=www-apps/gallery-1.4.1_p1"

References

Release Date
February 11, 2004

Latest Revision
February 11, 2004: 01

Severity
normal

Exploitable
remote

Bugzilla entries