Describe CVE-2013-4177.
What is CVE-2013-4177?
The Google Authenticator login module 6.x-1.x before 6.x-1.2 and 7.x-1.x before 7.x-1.4 for Drupal does not properly identify user account names, which might allow remote attackers to bypass the two-factor authentication requirement via unspecified vectors..