Gentoo alert: Gallery <= 1.4.1 and below remote exploit vulnerability

Posted by dave on Feb 11, 2004 12:24 PM EDT
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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 a remote exploit of your webserver.

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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200402-04 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ~ http://security.gentoo.org - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

~ Severity: Normal ~ Title: Gallery <= 1.4.1 remote exploit vulnerability ~ Date: February 11, 2004 ~ Bugs: #39638 ~ ID: 200402-04

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Synopsis ========

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 a remote exploit of your webserver.

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 ">=app-misc/gallery-1.4.1_p1" ~ # emerge ">=app-misc/gallery-1.4.1_p1"

Concerns? =========

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to [E-mail:security@gentoo.org] or alternatively, you may file a bug at http://bugs.gentoo.org.

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