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PHP Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition) Vulnerability - CVE-2006-5178 - Vulnerability Database
PHP

PHP Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition) Vulnerability - CVE-2006-5178

Medium
Reference: CVE-2006-5178
NVD Link: https://nvd.nist.gov/vuln/detail/CVE-2006-5178
Title: PHP Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition) Vulnerability
Overview:

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.