Provide references for CVE-2011-4308.
Where can I find more information about CVE-2011-4308?
References are available at: http://git.moodle.org/gw?p=moodle.git&a=search&s=MDL-28615, http://moodle.org/mod/forum/discuss.php?d=188322, http://www.debian.org/security/2012/dsa-2421, https://bugzilla.redhat.com/show_bug.cgi?id=747444.