CLONE_FS chroot exploit Security issue

Solution Unverified - Updated -

Environment

  • Red Hat Enterprise Linux

Issue

A new critical Linux exploit was discovered and we need to check if it exploits our environment (Currently running RHEL-5.9, 6.2 and 6.3). This new exploit will help a hacker to clone a root user using a specific library.
http://stealth.openwall.net/xSports/clown-newuser.c

Resolution

The CVE-2013-1858 is related the 'http://stealth.openwall.net/xSports/clown-newuser.c' and is the official Red Hat CVE for subjected privilege escalation flaw.

(CVE-2013-1858) CVE-2013-1858 kernel: CLONE_NEWUSER | CLONE_FS chroot exploit
https://bugzilla.redhat.com/show_bug.cgi?id=921448

Our Security Response Team checked it and verified that this issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG 2.

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