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Bug 1170684 - (CVE-2014-8989) CVE-2014-8989 kernel: Linux user namespaces can bypass group-based restrictions
CVE-2014-8989 kernel: Linux user namespaces can bypass group-based restrictions
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20141115,repor...
: Security
Depends On: 1170688 1170689
Blocks: 1164976
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Reported: 2014-12-04 10:36 EST by Vincent Danen
Modified: 2017-03-17 12:00 EDT (History)
32 users (show)

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Doc Type: Bug Fix
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Last Closed: 2017-03-17 12:00:19 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Vincent Danen 2014-12-04 10:36:48 EST 
Linux kernel built with the User namespaces(CONFIG_USER_NS) support is vulnerable to a potential 'group' privilege escalation flaw. It could occur when unsharing parts of process' execution context from other processes via unshare(2) or clone(2) calls.

A user/process able to unshare parts of its execution context could use this flaw to gain extra 'group' privileges on a system.

References:
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  -> http://thread.gmane.org/gmane.linux.man/7385/
  -> http://www.openwall.com/lists/oss-security/2014/11/20/4
Comment 2 Vincent Danen 2014-12-04 10:39:26 EST 
Statement:

Not vulnerable. This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
Comment 4 Petr Matousek 2014-12-04 10:44:15 EST 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1170688]
Comment 8 Fedora Update System 2015-01-10 21:58:20 EST 
kernel-3.17.8-300.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 9 Fedora Update System 2015-01-12 19:05:54 EST 
kernel-3.17.8-200.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
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