Bug 1084850

Summary:	XMPP resource consumption denial of service when using application-layer compression (XEP-0138)
Product:	[Other] Security Response	Reporter:	Murray McAllister <mmcallis>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	adrian, cperry, dmaphy, erlang, extras-orphan, jkaluza, jrusnack, lemenkov, martin, mcepl, mmahut, mmraka, taw
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:	2015-04-08 11:47:29 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:	1184157, 1184158, 1184159, 1184160
Bug Blocks:	1084851

Description Murray McAllister 2014-04-07 02:46:31 UTC

A flaw was found in the way XMPP handled application-layer compression (XEP-0138). An attacker could send crafted XMPP stanzas to an XMPP server that supports application-layer compression, resulting in excessive CPU and memory consumption. Full details are available in the original report:

http://xmpp.org/resources/security-notices/uncontrolled-resource-consumption-with-highly-compressed-xmpp-stanzas/

Although that report states jabberd and ejabberd are not affected, the versions in Fedora and EPEL appear to support XEP-0138 stream compression.

Comment 1 Murray McAllister 2014-04-07 02:50:47 UTC

I do not know where the fix is, or how to test which version is vulnerable or not. Investiagations are ongoing.

CVE request: http://www.openwall.com/lists/oss-security/2014/04/05/1

Comment 2 Murray McAllister 2014-04-07 05:54:38 UTC

The prosody package in Fedora and EPEL may also be affected: http://www.debian.org/security/2014/dsa-2895

Comment 3 Murray McAllister 2014-04-07 05:55:33 UTC

(In reply to Murray McAllister from comment #2)
> The prosody package in Fedora and EPEL may also be affected:
> http://www.debian.org/security/2014/dsa-2895

also from there, "The SAX XML parser lua-expat is also affected by this issues."

Comment 4 Murray McAllister 2014-04-09 07:07:59 UTC

(In reply to Murray McAllister from comment #2)
> The prosody package in Fedora and EPEL may also be affected:
> http://www.debian.org/security/2014/dsa-2895

filed https://bugzilla.redhat.com/show_bug.cgi?id=1085692 for this issue in prosody.

Comment 6 Vincent Danen 2015-01-20 17:09:53 UTC

Created jabberd tracking bugs for this issue:

Affects: fedora-all [bug 1184157]
Affects: epel-all [bug 1184158]

Comment 7 Vincent Danen 2015-01-20 17:09:55 UTC

Created ejabberd tracking bugs for this issue:

Affects: fedora-all [bug 1184159]
Affects: epel-all [bug 1184160]