Bug 1151095 (CVE-2014-7970)

Summary:	CVE-2014-7970 Kernel: fs: VFS denial of service
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	agordeev, aquini, bhu, carnil, dhoward, esammons, fhrbata, gansalmon, iboverma, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, lgoncalv, lwang, madhu.chinakonda, matt, mchehab, mcressma, mguzik, nmurray, pholasek, plougher, pmatouse, rt-maint, rvrbovsk, williams
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:	2016-02-10 07:42:46 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:	1151483, 1151484
Bug Blocks:	1150901

Description Prasad Pandit 2014-10-09 15:02:04 UTC

Linux kernel built with the VFS and user name-space support(CONFIG_USER_NS) is vulnerable to a potential DoS flaw. It could occur while doing pivot_root(2) call to change root file system.

A privileged user/process could use this flaw to potentially render a system unusable leading to DoS.

Upstream fix: 
-------------
  -> http://thread.gmane.org/gmane.linux.file-systems/89076

Reference:
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  -> http://seclists.org/oss-sec/2014/q4/228

Comment 1 Prasad Pandit 2014-10-10 14:27:25 UTC

Statement:

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 3 Prasad Pandit 2014-10-10 14:30:16 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1151484]

Comment 4 Petr Matousek 2014-10-15 13:06:16 UTC

Upstream commit:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0d0826019e529f21c84687521d03f60cd241ca7d

Comment 5 Fedora Update System 2014-10-17 08:39:58 UTC

kernel-3.16.6-200.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2014-10-19 13:21:35 UTC

kernel-3.14.22-100.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 7 Fedora Update System 2014-11-01 16:33:12 UTC

kernel-3.17.1-300.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 8 errata-xmlrpc 2017-08-01 19:07:59 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2077 https://access.redhat.com/errata/RHSA-2017:2077

Comment 9 errata-xmlrpc 2017-08-02 07:46:45 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1842 https://access.redhat.com/errata/RHSA-2017:1842