Bug 1221666 (CVE-2014-9721)

Summary:	CVE-2014-9721 zeromq: protocol downgrade attack on sockets using the ZMTP v3 protocol
Product:	[Other] Security Response	Reporter:	Vasyl Kaigorodov <vkaigoro>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	andrewniemants, carnil, ceph-eng-bugs, denis.arnaud_fedora, jose.p.oliveira.oss, mrunge, sisharma, tomspur
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	0MQ 4.0.6	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-07-06 10:45:01 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:
Bug Blocks:	1221668

Description Vasyl Kaigorodov 2015-05-14 14:08:32 UTC

It was discovered that zeromq, a lightweight messaging kernel, is
susceptible to a protocol downgrade attack on sockets using the ZMTP v3
protocol. This could allow remote attackers to bypass ZMTP v3 security
mechanisms by sending ZMTP v2 or earlier headers.

CVE request: http://openwall.com/lists/oss-security/2015/05/07/8
Upstream bug report: https://github.com/zeromq/libzmq/issues/1273
Upstream fix: https://github.com/zeromq/zeromq4-x/commit/b6e3e0f601e2c1ec1f3aac880ed6a3fe63043e51

Comment 1 Thomas Spura 2015-05-22 08:00:59 UTC

If I read the whiteboard correctly fedora-all/zeromq should be not affected by this attack, but in F22 and F23 it is as versions 4.0.5 are used there.

It is fixed in rawhide with:
http://koji.fedoraproject.org/koji/buildinfo?buildID=637994

and an update for F22 is on the way:
http://koji.fedoraproject.org/koji/buildinfo?buildID=637995
https://admin.fedoraproject.org/updates/FEDORA-2015-8635/zeromq-4.0.5-3.fc22

Comment 2 Tomas Hoger 2015-05-22 11:00:24 UTC

I believe fedora was noted as not affected as no released version include affected 4.x version.

Comment 3 Fedora Update System 2015-05-30 15:41:46 UTC

zeromq-4.0.5-3.fc22 has been pushed to the Fedora 22 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 4 Siddharth Sharma 2015-07-06 10:45:01 UTC

ceph-1.2 ships zeromq-3.2.5 which is not affected by this flaw.