Bug 1059052 (CVE-2014-1692)

Summary:	CVE-2014-1692 openssh: uninitialized variable use in J-PAKE implementation
Product:	[Other] Security Response	Reporter:	Murray McAllister <mmcallis>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	unspecified	CC:	jkurik, mattias.ellert, mgrepl, pfrields, plautrba, tmraz, vdanen
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-01-29 16:35:45 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Murray McAllister 2014-01-29 04:25:05 UTC

Mark Dowd reported uninitialized variable use in the shnorr_hash() function in OpenSSH. The J-PAKE implementation exposes this flaw. J-PAKE support is not enabled in the Red Hat Enterprise Linux and Fedora openssh packages.

Upstream fix:

http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/schnorr.c.diff?r1=1.9;r2=1.10

Comment 1 Murray McAllister 2014-01-29 04:30:15 UTC

Possible CVE request: http://www.openwall.com/lists/oss-security/2014/01/29/2

Comment 2 Murray McAllister 2014-01-29 04:30:50 UTC

J-PAKE support in OpenSSH is experimental work-in-progress.  It's not enabled in Red Hat Enterprise Linux and Fedora openssh packages.


Statement:

Not vulnerable. This issue did not affect the versions of openssh as shipped with Red Hat Enterprise Linux 4, 5, or 6, as the code for J-PAKE support is not compiled into the Red Hat shipped binaries.

Comment 3 Vincent Danen 2014-01-29 16:35:45 UTC

Common Vulnerabilities and Exposures assigned an identifier CVE-2014-1692 to
the following vulnerability:

Name: CVE-2014-1692
URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1692
Assigned: 20140129
Reference: http://openwall.com/lists/oss-security/2014/01/29/2
Reference: http://openwall.com/lists/oss-security/2014/01/29/10
Reference: http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/Attic/schnorr.c.diff?r1=1.9;r2=1.10;f=h
Reference: http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/schnorr.c#rev1.10

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.