OpenSSL before 1.0.0c, when J-PAKE is enabled, does not properly validate the public parameters in the J-PAKE protocol, which allows remote attackers to bypass the need for knowledge of the shared secret, and successfully authenticate, by sending crafted values in each round of the protocol.
http://cvs.openssl.org/chngview?cn=20098
http://marc.info/?l=bugtraq&m=129916880600544&w=2
http://marc.info/?l=bugtraq&m=130497251507577&w=2
http://openssl.org/news/secadv_20101202.txt
https://bugzilla.redhat.com/show_bug.cgi?id=659297
http://secunia.com/advisories/42469
http://secunia.com/advisories/57353
http://securitytracker.com/id?1024823
https://github.com/seb-m/jpake
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19039
http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004564