Bug 1159313 (CVE-2014-8559)

Summary: CVE-2014-8559 kernel: fs: deadlock due to incorrect usage of rename_lock
Product: [Other] Security Response Reporter: Prasad Pandit <ppandit>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: aquini, bhu, carnil, dhoward, fhrbata, gansalmon, iboverma, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, lgoncalv, madhu.chinakonda, matt, mchehab, mcressma, nmurray, 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:
A flaw was found in the way the Linux kernel's VFS subsystem handled file system locks. A local, unprivileged user could use this flaw to trigger a deadlock in the kernel, causing a denial of service on the system.
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-06-08 02:35:35 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: 1173812, 1173813, 1173814, 1173831, 1266516, 1266517    
Bug Blocks: 1159275    

Description Prasad Pandit 2014-10-31 13:26:14 UTC
Linux kernel built with Virtual File System(VFS) support is vulnerable to a
deadlock condition. It occurs due to incorrect usage of file system locks.

An unprivileged user/process could use this flaw to render the system unusable, thus resulting in DoS.

Upstream fix:
-------------
  -> https://git.kernel.org/linus/ca5358ef75fc69fee5322a38a340f5739d997c10
  -> https://git.kernel.org/linus/946e51f2bf37f1656916eb75bd0742ba33983c28

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2014/10/30/7

Comment 1 Prasad Pandit 2014-12-13 08:35:59 UTC
Statement:

This issue does not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6.

This issue affects the version of the kernel package as shipped with Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2. Future kernel updates for the respective releases may address this issue.

Comment 3 Prasad Pandit 2014-12-13 08:38:28 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1173814]

Comment 6 Fedora Update System 2014-12-21 06:36:27 UTC
kernel-3.17.7-200.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 7 Fedora Update System 2014-12-22 02:32:36 UTC
kernel-3.17.7-300.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 errata-xmlrpc 2015-11-03 16:39:40 UTC
This issue has been addressed in the following products:

  MRG for RHEL-6 v.2

Via RHSA-2015:1976 https://rhn.redhat.com/errata/RHSA-2015-1976.html

Comment 10 errata-xmlrpc 2015-11-03 16:42:58 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:1977 https://rhn.redhat.com/errata/RHSA-2015-1977.html

Comment 11 errata-xmlrpc 2015-11-03 18:52:59 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:1978 https://rhn.redhat.com/errata/RHSA-2015-1978.html