Description
OpenSSH 5.6 and earlier, 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, a related issue to CVE-2010-4252.
References
- http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/jpake.c#rev1.5
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10673
- oval:org.mitre.oval:def:12338 vdb-entry signature
- http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/jpake.c.diff?r1=1.4%3Br2=1.5%3Bf=h
- https://github.com/seb-m/jpake
- https://bugzilla.redhat.com/show_bug.cgi?id=659297
- http://seb.dbzteam.org/crypto/jpake-session-key-retrieval.pdf