[RHSA-2017:1232-01] Important: kernel security update

[news 28]

-----BEGIN PGP SIGNED MESSAGE-----

Hash: SHA1

 

=====================================================================

Red Hat Security Advisory

 

Synopsis: Important: kernel security update

Advisory ID: RHSA-2017:1232-01

Product: Red Hat Enterprise Linux

Advisory URL: https://access.redhat.com/errata/RHSA-2017:1232

Issue date: 2017-05-16

CVE Names: CVE-2017-2636

=====================================================================

 

1. Summary:

 

An update for kernel is now available for Red Hat Enterprise Linux 6.5

Advanced Update Support and Red Hat Enterprise Linux 6.5 Telco Extended

Update Support.

 

Red Hat Product Security has rated this update as having a security impact

of Important. A Common Vulnerability Scoring System (CVSS) base score,

which gives a detailed severity rating, is available for each vulnerability

from the CVE link(s) in the References section.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Server AUS (v. 6.5) - noarch, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 6.5) - x86_64

Red Hat Enterprise Linux Server Optional TUS (v. 6.5) - x86_64

Red Hat Enterprise Linux Server TUS (v. 6.5) - noarch, x86_64

 

3. Description:

 

The kernel packages contain the Linux kernel, the core of any Linux

operating system.

 

Security Fix(es):

 

* A race condition flaw was found in the N_HLDC Linux kernel driver when

accessing n_hdlc.tbuf list that can lead to double free. A local,

unprivileged user able to set the HDLC line discipline on the tty device

could use this flaw to increase their privileges on the system.

(CVE-2017-2636, Important)

 

Red Hat would like to thank Alexander Popov for reporting this issue.

 

4. Solution:

 

For details on how to apply this update, which includes the changes

described in this advisory, refer to:

 

https://access.redhat.com/articles/11258

 

The system must be rebooted for this update to take effect.

 

5. Bugs fixed (https://bugzilla.redhat.com/):

 

1428319 - CVE-2017-2636 kernel: Race condition access to n_hdlc.tbuf causes double free in n_hdlc_release()

 

6. Package List:

 

Red Hat Enterprise Linux Server AUS (v. 6.5):

 

Source:

kernel-2.6.32-431.80.1.el6.src.rpm

 

noarch:

kernel-abi-whitelists-2.6.32-431.80.1.el6.noarch.rpm

kernel-doc-2.6.32-431.80.1.el6.noarch.rpm

kernel-firmware-2.6.32-431.80.1.el6.noarch.rpm

 

x86_64:

kernel-2.6.32-431.80.1.el6.x86_64.rpm

kernel-debug-2.6.32-431.80.1.el6.x86_64.rpm

kernel-debug-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

kernel-debug-devel-2.6.32-431.80.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-431.80.1.el6.x86_64.rpm

kernel-devel-2.6.32-431.80.1.el6.x86_64.rpm

kernel-headers-2.6.32-431.80.1.el6.x86_64.rpm

perf-2.6.32-431.80.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server TUS (v. 6.5):

 

Source:

kernel-2.6.32-431.80.1.el6.src.rpm

 

noarch:

kernel-abi-whitelists-2.6.32-431.80.1.el6.noarch.rpm

kernel-doc-2.6.32-431.80.1.el6.noarch.rpm

kernel-firmware-2.6.32-431.80.1.el6.noarch.rpm

 

x86_64:

kernel-2.6.32-431.80.1.el6.x86_64.rpm

kernel-debug-2.6.32-431.80.1.el6.x86_64.rpm

kernel-debug-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

kernel-debug-devel-2.6.32-431.80.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-431.80.1.el6.x86_64.rpm

kernel-devel-2.6.32-431.80.1.el6.x86_64.rpm

kernel-headers-2.6.32-431.80.1.el6.x86_64.rpm

perf-2.6.32-431.80.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional AUS (v. 6.5):

 

Source:

kernel-2.6.32-431.80.1.el6.src.rpm

 

x86_64:

kernel-debug-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-431.80.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

python-perf-2.6.32-431.80.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional TUS (v. 6.5):

 

Source:

kernel-2.6.32-431.80.1.el6.src.rpm

 

x86_64:

kernel-debug-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-431.80.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

python-perf-2.6.32-431.80.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm

 

These packages are GPG signed by Red Hat for security. Our key and

details on how to verify the signature are available from

https://access.redhat.com/security/team/key/

 

7. References:

 

https://access.redhat.com/security/cve/CVE-2017-2636

https://access.redhat.com/security/updates/classification/#important

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2017 Red Hat, Inc.

-----BEGIN PGP SIGNATURE-----

Version: GnuPG v1

 

iD8DBQFZGspzXlSAg2UNWIIRAubcAJ9cXSGWdtUjeU0K279k4rFFTOaRTgCgrAWq

+frrJk+ZjKEhrR82USNhFhs=

=k4fV

-----END PGP SIGNATURE-----

 

--