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Category:   Device (Firewall)  >   McAfee Firewall Enterprise Vendors:   McAfee
(McAfee Issues Fix for McAfee Firewall Enterprise) FreeBSD Kernel nullfs(5) Cross-Mount Links May Let Local Users Bypass Access Controls
SecurityTracker Alert ID:  1029260
SecurityTracker URL:  http://securitytracker.com/id/1029260
CVE Reference:   CVE-2013-5710   (Links to External Site)
Date:  Oct 28 2013
Impact:   Modification of system information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 8.3.1P04
Description:   A vulnerability was reported in FreeBSD. A local user can bypass filesystem access controls in certain cases. McAfee Firewall Enterprise is affected.

A local user with read access to a nullfs view and write access to a different nullfs view into the same filesystem can create a hard link from the read-only view to the other view to be able to gain write access on an ostensibly read-only file system.

Konstantin Belousov reported this vulnerability.

Impact:   A local user can bypass filesystem access controls in certain cases.
Solution:   McAfee has issued a fix for McAfee Firewall Enterprise (8.3.1P04).

The McAfee advisory is available at:

https://kc.mcafee.com/corporate/index?page=content&id=KB79597

Vendor URL:  security.FreeBSD.org/advisories/FreeBSD-SA-13:13.nullfs.asc (Links to External Site)
Cause:   Access control error

Message History:   This archive entry is a follow-up to the message listed below.
Sep 10 2013 FreeBSD Kernel nullfs(5) Cross-Mount Links May Let Local Users Bypass Access Controls



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