Bug 1170684 (CVE-2014-8989) - CVE-2014-8989 kernel: Linux user namespaces can bypass group-based restrictions
Summary: CVE-2014-8989 kernel: Linux user namespaces can bypass group-based restrictions
Status: CLOSED ERRATA
Alias: CVE-2014-8989
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: impact=moderate,public=20141115,repor...
Keywords: Security
Depends On: 1170688 1170689
Blocks: 1164976
TreeView+ depends on / blocked
 
Reported: 2014-12-04 15:36 UTC by Vincent Danen
Modified: 2019-06-08 20:18 UTC (History)
32 users (show)

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Clone Of:
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Last Closed: 2017-03-17 16:00:19 UTC


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Description Vincent Danen 2014-12-04 15:36:48 UTC
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:
-----------
  -> 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 15:39:26 UTC
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 15:44:15 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1170688]

Comment 8 Fedora Update System 2015-01-11 02:58:20 UTC
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 2015-01-13 00:05:54 UTC
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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