PHP version older than 5.2.1

Description

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This release is a major stability and security enhancement of the 5.X branch, and all users are strongly encouraged to upgrade to it as soon as possible.

Security Enhancements and Fixes in PHP 5.2.1:

Fixed possible safe_mode & open_basedir bypasses inside the session extension.
Prevent search engines from indexing the phpinfo() page.
Fixed a number of input processing bugs inside the filter extension.
Fixed unserialize() abuse on 64 bit systems with certain input strings.
Fixed possible overflows and stack corruptions in the session extension.
Fixed an underflow inside the internal sapi_header_op() function.
Fixed allocation bugs caused by attempts to allocate negative values in some code paths.
Fixed possible stack overflows inside zip, imap & sqlite extensions.
Fixed several possible buffer overflows inside the stream filters.
Fixed non-validated resource destruction inside the shmop extension.
Fixed a possible overflow in the str_replace() function.
Fixed possible clobbering of super-globals in several code paths.
Fixed a possible information disclosure inside the wddx extension.
Fixed a possible string format vulnerability in *print() functions on 64 bit systems.
Fixed a possible buffer overflow inside mail() and ibase_{delete,add,modify}_user() functions.
Fixed a string format vulnerability inside the odbc_result_all() function.
Memory limit is now enabled by default.
Added internal heap protection.
Extended filter extension support for $_SERVER in CGI and apache2 SAPIs.