Bug 1168146 (CVE-2014-9091)

Summary:	CVE-2014-9091 icecast: supplementary groups are not overriden
Product:	[Other] Security Response	Reporter:	Martin Prpič <mprpic>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	andreas
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	icecast 2.4.0	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:36:35 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:	1168147, 1168148, 1168149
Bug Blocks:

Description Martin Prpič 2014-11-26 09:23:58 UTC

It was found that when the UID and GID were changed in the <changeowner> section of the /etc/icecast.xml file, the supplementary groups were left in place. This could allow an attacker to escalate their privileges if the <changeowner> configuration was used.

The following fix was added to icecast version 2.4.0:

In case of <changeowner> only UID and GID were changed, supplementary groups were left in place. This is a potential security issue only if <changeowner> is used. New behaviour is to set UID, GID and set supplementary groups based on the UID Even in case of icecast remaining in supplementary group 0 this "only" gives it things like access to files that are owned by group 0 and according to their umask. This is obviously bad, but not as bad as UID 0 with all its other special rights. It's a security issue and we fix immediately and recommend users to update.

References:
http://icecast.org/news/icecast-release-2_4_0/
https://trac.xiph.org/changeset/19137/
http://seclists.org/oss-sec/2014/q4/802

Comment 1 Martin Prpič 2014-11-26 09:25:30 UTC

Created icecast tracking bugs for this issue:

Affects: fedora-all [bug 1168147]
Affects: epel-5 [bug 1168148]
Affects: epel-6 [bug 1168149]

Comment 2 Fedora Update System 2014-12-15 04:29:57 UTC

icecast-2.4.1-1.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 3 Fedora Update System 2014-12-15 04:37:13 UTC

icecast-2.4.1-1.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2014-12-15 04:37:40 UTC

icecast-2.4.1-1.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2014-12-20 00:14:07 UTC

icecast-2.4.1-1.el5 has been pushed to the Fedora EPEL 5 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2014-12-20 00:15:36 UTC

icecast-2.4.1-1.el6 has been pushed to the Fedora EPEL 6 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 7 Product Security DevOps Team 2019-06-08 02:36:35 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.