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: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: 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   
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:


Fixed by:



This issue was discovered by Miroslav Vadkerti of Red Hat.

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

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