CVE-2008-4102

Joomla! 1.5 before 1.5.7 initializes PHP’s PRNG with a weak seed, which makes it easier for attackers to guess the pseudo-random values produced by PHP’s mt_rand function, as demonstrated by guessing password reset tokens, a different vulnerability than CVE-2008-3681.

Date published : 2008-09-18

http://www.securityfocus.com/archive/1/496237/100/0/threaded

http://developer.joomla.org/security/news/272-20080902-core-random-number-generation-flaw.html