Vulnerability CVE-2010-4252
Published: 2010-12-06   Modified: 2012-02-13

Description:
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.

See advisories in our WLB2 database:
Topic
Author
Date
High
OpenSSL J-PAKE Validation Error Lets Remote Users Validate Without Shared Secret Key
Sebastian Martin...
08.12.2010

Type:

CWE-287

 (Improper Authentication)

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
Openssl -> Openssl 

 References:
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
http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:19039
http://seb.dbzteam.org/crypto/jpake-session-key-retrieval.pdf
http://securitytracker.com/id?1024823
http://slackware.com/security/viewer.php?l=slackware-security&y=2010&m=slackware-security.668471
http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004564
http://www.securityfocus.com/bid/45163
http://www.vupen.com/english/advisories/2010/3120
http://www.vupen.com/english/advisories/2010/3122
https://bugzilla.redhat.com/show_bug.cgi?id=659297
https://github.com/seb-m/jpake
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