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PHP 5.3.9 'php_register_variable_ex()' Code Execution (banner check)

Description

According to its banner, the version of PHP installed on the remote host is 5.3.9. This version reportedly is affected by a code execution vulnerability. Specifically, the fix for the hash collision denial of service vulnerability (CVE-2011-4885) itself has introduced a remote code execution vulnerability in the function 'php_register_variable_ex()' in the file 'php_variables.c'. A new configuration variable, 'max_input_vars', was added as a part of the fix. If the number of input variables exceeds this value and the variable being processed is an array, code execution can occur.


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