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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
Race condition in the symlink function in PHP 5.1.6 and earlier allows local users to bypass the open_basedir restriction by using a combination of symlink, mkdir, and unlink functions to change the file path after the open_basedir check and before the file is opened by the underlying system, as demonstrated by symlinking a symlink into a subdirectory, to point to a parent directory via .. (dot dot) sequences, and then unlinking the resulting symlink.
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We do not consider these to be security issues. For more details see http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=169857#c1
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http://www.securityfocus.com/archive/1/447649/100/0/threaded [No Types Assigned]
http://www.securityfocus.com/archive/1/448020/100/0/threaded [No Types Assigned]
http://www.securityfocus.com/archive/1/448953/100/0/threaded [No Types Assigned]
http://www.securityfocus.com/archive/1/archive/1/447649/100/0/threaded [Exploit, Vendor Advisory]
http://www.securityfocus.com/archive/1/archive/1/448020/100/0/threaded [No Types Assigned]
http://www.securityfocus.com/archive/1/archive/1/448953/100/0/threaded [No Types Assigned]
https://exchange.xforce.ibmcloud.com/vulnerabilities/29340 [No Types Assigned]