Bug 1370146 (CVE-2016-6303)

Summary:	CVE-2016-6303 openssl: Integer overflow in MDC2_Update()
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bbaranow, bmaxwell, cdewolf, csutherl, dandread, darran.lofthouse, dosoudil, erik-fedora, gzaronik, jaeshin, jawilson, jclere, ktietz, lersek, lgao, marcandre.lureau, mbabacek, mehmetgelisin, myarboro, pgier, psakar, pslavice, redhat-bugzilla, rjones, rnetuka, rsvoboda, sardella, slawomir, specification166din, tmraz, twalsh, vtunka, weli
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-09-16 20:36:25 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:
Bug Depends On:	1370147, 1370148, 1370149
Bug Blocks:	1367347

Description Adam Mariš 2016-08-25 12:07:00 UTC

Possible integer overflow vulnerability was found in MDC2_Update() function that can lead to out-of-bounds write.

Upstream patch:

https://github.com/openssl/openssl/commit/2b4029e68fd7002d2307e6c3cde0f3784eef9c83

Comment 1 Adam Mariš 2016-08-25 12:07:50 UTC

Created openssl101e tracking bugs for this issue:

Affects: epel-5 [bug 1370149]

Comment 2 Adam Mariš 2016-08-25 12:08:05 UTC

Created openssl tracking bugs for this issue:

Affects: fedora-all [bug 1370147]

Comment 3 Adam Mariš 2016-08-25 12:08:16 UTC

Created mingw-openssl tracking bugs for this issue:

Affects: fedora-all [bug 1370148]

Comment 4 Tomas Hoger 2016-09-16 20:36:25 UTC

MDC-2 support is not enabled in OpenSSL packages in Red Hat products.  Therefore, this issue can not affect those packages.

Comment 5 Tomas Hoger 2016-09-20 20:25:35 UTC

Statement:

Not vulnerable. This issue did not affect the versions of openssl as shipped with Red Hat Enterprise Linux 4, 5, 6, and 7, as they did not include support for MDC-2.