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>> PHP "open_basedir" Directive Security Bypass Vulnerability
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Title : PHP "open_basedir" Directive Security Bypass Vulnerability
VUPEN ID : VUPEN/ADV-2005-1862
CVE ID : CVE-2005-3054
CWE ID : CWE-
Rated as : Low Risk 
Remotely Exploitable : No
Locally Exploitable : Yes
Release Date : 2005-09-27
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A vulnerability has been identified in PHP, which could be exploited by malicious users to bypass security policies. This flaw is due to an error in "fopen_wrappers.c" that does not properly restrict access to other directories when the "open_basedir" directive includes a trailing slash, which could allow certain scripts in a directory (e.g. "/user/test2/) to access files in other directories whose names are substrings of the original directory (e.g. "/user/test22/).
Affected Products
PHP version 4.4.0 and prior
PHP version 5.0.5 and prior
Solution
Upgrade to PHP version 4.4.1 or 5.1.0 :
http://www.php.net/downloads.php
References
http://www.vupen.com/english/advisories/2005/1862
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=323585
Credits
Vulnerability reported by thorben
ChangeLog
2005-09-27 : Initial release
2005-10-31 : Updated Solution
Vulnerability Management
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