Bug 1288955 (CVE-2015-1794)

Summary:	CVE-2015-1794 OpenSSL: Anon DH ServerKeyExchange with 0 p parameter
Product:	[Other] Security Response	Reporter:	Huzaifa S. Sidhpurwala <huzaifas>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	bbaranow, bmaxwell, cdewolf, csutherl, dandread, darran.lofthouse, dknox, jason.greene, jawilson, jboss-set, jclere, jdoyle, lgao, mbabacek, myarboro, pgier, psakar, pslavice, rsvoboda, tmraz, twalsh, vtunka, weli
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
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Last Closed:	2015-12-07 06:12:27 UTC	Type:	---
Regression:	---	Mount Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1288329

Description Huzaifa S. Sidhpurwala 2015-12-07 06:09:08 UTC

The following was reported by OpenSSL upstream:

If a client receives a ServerKeyExchange for an anonymous DH ciphersuite with the value of p set to 0 then a seg fault can occur leading to a possible denial of service attack.

This issue affects OpenSSL version 1.0.2.

OpenSSL 1.0.2 users should upgrade to 1.0.2e

This issue was reported to OpenSSL on August 3 2015 by Guy Leaver (Cisco). The fix was developed by Matt Caswell of the OpenSSL development team.

Comment 1 Huzaifa S. Sidhpurwala 2015-12-07 06:12:27 UTC

Statement:

This issue does not affect the version of OpenSSL as shipped with Red Hat Enterprise Linux 5, 6 and 7.