|Bugzilla:||1094232: CVE-2014-0196 kernel: pty layer race condition leading to memory corruption|
The MITRE CVE dictionary describes this issue as:
The n_tty_write function in drivers/tty/n_tty.c in the Linux kernel through 3.14.3 does not properly manage tty driver access in the "LECHO & !OPOST" case, which allows local users to cause a denial of service (memory corruption and system crash) or gain privileges by triggering a race condition involving read and write operations with long strings.
This issue did not affect the versions of the Linux kernel packages as shipped with Red Hat Enterprise Linux 5.
This issue affected the versions of the Linux kernel packages as shipped with Red Hat Enterprise Linux 6 prior to version kernel-2.6.32-358.6.1.el6, released via RHSA-2013:0744 (https://rhn.redhat.com/errata/RHSA-2013-0744.html). That update added a backport of the upstream commit c56a00a165, which avoided this issue.
This flaw requires local system access to be exploited. We are currently not aware of any working exploit for Red Hat Enterprise Linux 6 or Red Hat Enterprise MRG 2.
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Red Hat security errata
|MRG Grid for RHEL 6 Server v.2 (kernel-rt)||RHSA-2014:0557||May 27, 2014|
|Red Hat Enterprise Linux AUS (v. 6.2 server) (kernel)||RHSA-2014:0520||May 20, 2014|
|Red Hat Enterprise Linux Server EUS (v. 6.3) (kernel)||RHSA-2014:0512||May 19, 2014|
|Red Hat Enterprise Linux version 7 (kernel)||RHSA-2014:0678||June 10, 2014|
This page is generated automatically and has not been checked for errors or omissions.
For clarification or corrections please contact the Red Hat Security Response Team.