Bug 1151108 (CVE-2014-7975)

Summary:	CVE-2014-7975 Kernel: fs: umount 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, dhoward, esammons, fhrbata, gansalmon, iboverma, itamar, jforbes, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, lwang, madhu.chinakonda, matt, mchehab, mcressma, mguzik, mrg-program-list, nmurray, pholasek, plougher, pmatouse, 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 07:48:16 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:	1152024, 1152025
Bug Blocks:	1150901

Description Prasad Pandit 2014-10-09 15:24:28 UTC

Linux kernel file system implementation is vulnerable to a DoS flaw. It could occur by doing umount(2) call from within user name spaces.

An unprivileged user/process could use this flaw to render the system unusable by making file system inaccessible.

Upstream fix:
-------------
  -> http://thread.gmane.org/gmane.linux.kernel.stable/109312

Reference:
-----------
  -> http://seclists.org/oss-sec/2014/q4/229

Comment 1 Prasad Pandit 2014-10-13 10:48:28 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 2014-10-13 11:10:08 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1152025]

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

Upstream commit:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0ef3a56b1c466629cd0bf482b09c7b0e5a085bb5

Comment 5 Fedora Update System 2014-10-17 08:39:53 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 13:21:31 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 16:33:07 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 19:08:13 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 07:47:06 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