Vulnerability CVE-2010-4478
Published: 2010-12-06   Modified: 2012-02-13

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.

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Openssh -> Openssh 
Openbsd -> Openssh 

 References:
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10673
http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:12338
http://seb.dbzteam.org/crypto/jpake-session-key-retrieval.pdf
http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/jpake.c#rev1.5
http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/jpake.c.diff?r1=1.4;r2=1.5;f=h
https://bugzilla.redhat.com/show_bug.cgi?id=659297
https://github.com/seb-m/jpake
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