pam_krb5 2.2.14 through 2.3.4, as used in Red Hat Enterprise Linux (RHEL)
5, generates different password prompts depending on whether the user
account exists, which allows remote attackers to enumerate valid usernames.
jdstrand> there are currently no public details on the issue. 6.06 LTS
appears not to be affected, while 8.04 LTS and higher likely are affected
Updated: 2015-10-22 17:14:39 UTC (commit 10109)