Bug 1168146 (CVE-2014-9091) - CVE-2014-9091 icecast: supplementary groups are not overriden
Summary: CVE-2014-9091 icecast: supplementary groups are not overriden
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2014-9091
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1168147 1168148 1168149
Blocks:
TreeView+ depends on / blocked
 
Reported: 2014-11-26 09:23 UTC by Martin Prpič
Modified: 2019-09-29 13:24 UTC (History)
1 user (show)

Fixed In Version: icecast 2.4.0
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-06-08 02:36:35 UTC
Embargoed:

Attachments (Terms of Use)

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.
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