Bug 1027752 (CVE-2013-4270)

Summary:	CVE-2013-4270 kernel: net: permissions flaw in /proc/sys/net
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	agordeev, anton, aquini, bhu, davej, dhoward, esammons, fhrbata, gansalmon, iboverma, itamar, jforbes, jkacur, jkurik, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, lgoncalv, lwang, madhu.chinakonda, matt, mcressma, npajkovs, pholasek, plougher, 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:	2014-01-28 18:33:07 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	987055, 1027755, 1027757
Bug Blocks:	1027758

Description Petr Matousek 2013-11-07 11:28:48 UTC

A flaw was found in the way net_ctl_permissions() function in the Linux kernel checked permissions.

As a result, an unprivileged local user could potentially use this flaw to access files in /proc/sys/net in a way that he would otherwise be unable to.

Introduced by:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cff109768b2d9c03095848f4cd4b0754117262aa

Fixed by:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2433c8f094a008895e66f25bd1773cdb01c91d01

Acknowledgements:

This issue was discovered by Miroslav Vadkerti of Red Hat.

Comment 2 Petr Matousek 2013-11-07 11:34:48 UTC

Statement:

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

Comment 3 errata-xmlrpc 2014-01-28 17:40:29 UTC

This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2014:0100 https://rhn.redhat.com/errata/RHSA-2014-0100.html