CVE-2011-4587 Information

Description

lib/moodlelib.php in Moodle 1.9.x before 1.9.15 2.0.x before 2.0.6 and 2.1.x before 2.1.3 does not properly handle certain zero values in the password policy which makes it easier for remote attackers to obtain access by leveraging the possible existence of user accounts that have unchangeable blank passwords.

Reference

http://git.moodle.org/gw?p=moodle.git;a=commit;h=e079e82c087becf06d902089d14f3f76686bde19 http://moodle.org/mod/forum/discuss.php?d=191755 http://www.debian.org/security/2012/dsa-2421 https://bugzilla.redhat.com/show_bug.cgi?id=761248