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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 |
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~ Title: PHP setting leaks from .htaccess files on virtual hosts |
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~ Date: February 07, 2004 |
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~ Bugs: #39952 |
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~ ID: 200402-01 |
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Synopsis |
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======== |
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|
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If the server configuration "php.ini" file has "register_globals = on" |
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and a request is made to one virtual host (which has "php_admin_flag |
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register_globals off") and the next request is sent to the another |
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virtual host (which does not have the setting) through the same apache |
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child, the setting will persist. This may lead to leaks of global variables. |
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|
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Background |
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========== |
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|
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PHP is a widely-used general-purpose scripting language that is |
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especially suited for Web development and can be embedded into HTML. |
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Description |
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=========== |
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|
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If the server configuration "php.ini" file has "register_globals = on" |
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and a request is made to one virtual host (which has "php_admin_flag |
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register_globals off") and the next request is sent to the another |
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virtual host (which does not have the setting) through the same Apache |
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child, the setting will persist. |
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|
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Impact |
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====== |
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Depending on the server and site, an attacker may be able to exploit |
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global variables to gain access to reserved areas, such as MySQL |
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passwords, or this vulnerability may simply cause a lack of |
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functionality. As a result, users are urged to upgrade their PHP |
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installations. |
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|
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Gentoo ships PHP with "register_globals" set to "off" by default. |
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This issue affects both servers running Apache 1.x and servers running |
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Apache 2.x. |
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Workaround |
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========== |
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No immediate workaround is available; a software upgrade is required. |
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Resolution |
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========== |
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All users are recommended to upgrade their mod_php installation to 4.3.4-r4: |
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~ # emerge sync |
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~ # emerge -pv ">=dev-php/mod_php-4.3.4-r4" |
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~ # emerge ">=dev-php/mod_php-4.3.4-r4" |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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