Apache CouchDB 0.8.0 through 0.10.1 allows remote attackers to obtain sensitive information by measuring the completion time of operations that verify (1) hashes or (2) passwords.
https://bugzilla.redhat.com/show_bug.cgi?id=578572
http://www.securityfocus.com/bid/39116
http://www.securityfocus.com/archive/1/510427/100/0/threaded
http://secunia.com/advisories/39146
http://couchdb.apache.org/security.html
http://archives.neohapsis.com/archives/bugtraq/2010-03/0267.html