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PHP "open_basedir" Symlink Security Bypass Vulnerability
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Secunia Advisory:
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SA22235
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Release Date:
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2006-10-04
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Last Update:
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2006-10-13
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Popularity:
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11,634 views
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Critical:
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Less critical
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Impact:
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Security Bypass
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Where:
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Local system
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Solution Status:
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Unpatched
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| Software: | PHP 4.0.x
PHP 4.1.x
PHP 4.2.x
PHP 4.3.x
PHP 4.4.x
PHP 5.0.x
PHP 5.1.x
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| CVE reference: | CVE-2006-5178
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Description:
Stefan Esser has reported a vulnerability in PHP, which can be exploited by malicious, local users to bypass certain security restrictions.
The vulnerability is caused due to a race condition in the handling of symlinks and can be exploited to bypass the open_basedir protection mechanism.
The vulnerability has been reported in PHP4 and PHP5.
Solution:
Disable the "symlink()" function in php.ini.
Provided and/or discovered by:
Stefan Esser
Changelog:
2006-10-12: Added CVE reference.
Original Advisory:
http://www.hardened-php.net/advisory_082006.132.html
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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