Vulnerability CVE-2014-1692
Published: 2014-01-29

Description:
The hash_buffer function in schnorr.c in OpenSSH through 6.4, when Makefile.inc is modified to enable the J-PAKE protocol, does not initialize certain data structures, which might allow remote attackers to cause a denial of service (memory corruption) or have unspecified other impact via vectors that trigger an error condition.

See advisories in our WLB2 database:
Topic
Author
Date
High
OpenSSH J-PAKE protocol remote memory corruption
Kurt
29.01.2014

Type:

CWE-119

 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

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
Openbsd -> Openssh 

 References:
http://marc.info/?l=bugtraq&m=141576985122836&w=2
http://marc.info/?l=bugtraq&m=144050155601375&w=2
http://openwall.com/lists/oss-security/2014/01/29/10
http://openwall.com/lists/oss-security/2014/01/29/2
http://secunia.com/advisories/60184
http://www-01.ibm.com/support/docview.wss?uid=isg3T1020637
http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/Attic/schnorr.c.diff?r1=1.9;r2=1.10;f=h
http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/schnorr.c#rev1.10
http://www.securityfocus.com/bid/65230
http://xforce.iss.net/xforce/xfdb/90819
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