[ GLSA 200402-04 ] Gallery <= 1.4.1 and below remote exploit vulnerability

From: Tim Yamin (plasmaroo_at_gentoo.org)
Date: 02/11/04

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    Date: Wed, 11 Feb 2004 21:21:48 +0000
To: bugtraq@securityfocus.com, full-disclosure@lists.netsys.com, security-alerts@linuxsecurity.com, gentoo-core@gentoo.org, gentoo-announce@gentoo.org

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    Gentoo Linux Security Advisory GLSA 200402-04
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    ~ http://security.gentoo.org
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    ~ 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
    security@gentoo.org or alternatively, you may file a bug at
    http://bugs.gentoo.org.

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