[Full-Disclosure] [ GLSA 200402-01 ] PHP setting leaks from .htaccess files on virtual hosts

From: Tim Yamin (plasmaroo_at_gentoo.org)
Date: 02/07/04

  • Next message: Curt Purdy: "RE: [inbox] [Full-Disclosure] Unbelievable: I just got sensored" 
    To: bugtraq@securityfocus.com, full-disclosure@lists.netsys.com, security-alerts@linuxsecurity.com, gentoo-core@gentoo.org, gentoo-announce@gentoo.org
Date: Sat, 07 Feb 2004 01:02:40 +0000

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    Gentoo Linux Security Advisory GLSA 200402-01
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    ~ http://security.gentoo.org
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    ~ Severity: Normal
    ~ Title: PHP setting leaks from .htaccess files on virtual hosts
    ~ Date: February 07, 2004
    ~ Bugs: #39952
    ~ ID: 200402-01

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    Synopsis
    ========

    If the server configuration "php.ini" file has "register_globals = on"
    and a request is made to one virtual host (which has "php_admin_flag
    register_globals off") and the next request is sent to the another
    virtual host (which does not have the setting) through the same apache
    child, the setting will persist. This may lead to leaks of global variables.

    Background
    ==========

    PHP is a widely-used general-purpose scripting language that is
    especially suited for Web development and can be embedded into HTML.

    Description
    ===========

    If the server configuration "php.ini" file has "register_globals = on"
    and a request is made to one virtual host (which has "php_admin_flag
    register_globals off") and the next request is sent to the another
    virtual host (which does not have the setting) through the same Apache
    child, the setting will persist.

    Impact
    ======

    Depending on the server and site, an attacker may be able to exploit
    global variables to gain access to reserved areas, such as MySQL
    passwords, or this vulnerability may simply cause a lack of
    functionality. As a result, users are urged to upgrade their PHP
    installations.

    Gentoo ships PHP with "register_globals" set to "off" by default.

    This issue affects both servers running Apache 1.x and servers running
    Apache 2.x.

    Workaround
    ==========

    No immediate workaround is available; a software upgrade is required.

    Resolution
    ==========

    All users are recommended to upgrade their mod_php installation to 4.3.4-r4:

    ~ # emerge sync
    ~ # emerge -pv ">=dev-php/mod_php-4.3.4-r4"
    ~ # emerge ">=dev-php/mod_php-4.3.4-r4"

    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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    _______________________________________________
    Full-Disclosure - We believe in it.
    Charter: http://lists.netsys.com/full-disclosure-charter.html

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