Provide references for CVE-2012-4571.
Where can I find more information about CVE-2012-4571?
References are available at: http://pypi.python.org/pypi/keyring, https://bugs.launchpad.net/ubuntu/+source/python-keyring/+bug/1004845, http://www.openwall.com/lists/oss-security/2012/10/31/8, http://www.ubuntu.com/usn/USN-1634-1.