PHP versions prior to 5.3.10 are reportedly 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 php_register_variable_ex() in the file โphp_variables.cโ. A new configuration variable, โmax_input_varsโ, was added as 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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