http://www.php.net/releases/5_2_4.php # Fixed a possible buffer overflow in php_openssl_make_REQ (Reported by zatanzlatan at hotbrev dot com)
http://cvs.php.net/viewvc.cgi/php-src/ext/openssl/openssl.c?r1=1.98.2.5.2.38&r2=1.98.2.5.2.39&diff_format=u
This bug can only be triggered by supplying a non-default openssl.conf configuration file, which is entirely under the control of the script author or server administrator, and hence will not be treated as a security issue.