Bug 1403790 (CVE-2016-9928)

Summary:	CVE-2016-9928 mcabber: remote attackers can modify the roster and intercept messages via a crafted roster-push IQ stanza
Product:	[Other] Security Response	Reporter:	Martin Prpič <mprpic>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	fale, mmahut, opensource
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2016-12-12 14:17:52 UTC	Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1403792
Bug Blocks:

Description Martin Prpič 2016-12-12 11:33:28 UTC

It was discovered that MCabber versions 1.0.3 and before are vulnerable to an attack identical to Gajim's CVE-2015-8688 that can lead to a malicious actor MITMing a conversation, or adding themselves as an entity on a third parties roster (thereby granting themselves the associated privileges).

Upstream patch:

https://bitbucket.org/McKael/mcabber-crew/commits/6e1ead98930d7dd0a520ad17c720ae4908429033/raw

References:

https://gultsch.de/gajim_roster_push_and_message_interception.html
http://seclists.org/oss-sec/2016/q4/653

Comment 1 Martin Prpič 2016-12-12 11:35:15 UTC

Created mcabber tracking bugs for this issue:

Affects: fedora-all [bug 1403792]

Comment 2 Fabio Alessandro Locati 2016-12-12 14:17:52 UTC

mcabber 1.0.4 has already arrived to stable in F23, F24, F25, rawhide