ESB-2018.2008 - [RedHat] kernel-rt: Access privileged data - Existing account 2018-07-11

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.2008
       kernel-rt security, and enhancement update for RHEL 6 Server
                               11 July 2018

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

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           kernel-rt
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux Server 6
Impact/Access:     Access Privileged Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-3665 CVE-2017-13305 

Reference:         ESB-2018.1987
                   ESB-2018.1804
                   ESB-2018.1770

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2018:2165

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                   Red Hat Security Advisory

Synopsis:          Moderate: kernel-rt security, and enhancement update
Advisory ID:       RHSA-2018:2165-01
Product:           Red Hat Enterprise MRG for RHEL-6
Advisory URL:      https://access.redhat.com/errata/RHSA-2018:2165
Issue date:        2018-07-10
CVE Names:         CVE-2017-13305 CVE-2018-3665 
=====================================================================

1. Summary:

Updated kernel-rt packages that fix two security issues and add one
enhancement are now available for Red Hat Enterprise MRG 2.

Red Hat Product Security has rated this update as having a security impact
of Moderate. 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 MRG Realtime for RHEL 6 Server v.2 - noarch, x86_64

3. Description:

The kernel-rt packages provide the Real Time Linux Kernel, which enables
fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

* kernel: Buffer over-read in keyring subsystem allows exposing potentially
sensitive information to local attacker (CVE-2017-13305)

* Kernel: FPU state information leakage via lazy FPU restore
(CVE-2018-3665)

For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.

Red Hat would like to thank Julian Stecklina (Amazon.de), Thomas Prescher
(cyberus-technology.de), and Zdenek Sojka (sysgo.com) for reporting
CVE-2018-3665.

Enhancement(s):

* The kernel-rt packages have been upgraded to version
3.10.0-693.35.1.rt56.623, which provides a number of bug fixes over the
previous version. (BZ#1579972)

Users of kernel-rt are advised to upgrade to these updated packages, which
add this enhancement.

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

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

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

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

1579972 - Update the kernel-rt sources with the latest 3.10 sources.
1581637 - CVE-2017-13305 kernel: Buffer over-read in keyring subsystem allows exposing potentially sensitive information to local attacker
1585011 - CVE-2018-3665 Kernel: FPU state information leakage via lazy FPU restore

6. Package List:

Red Hat MRG Realtime for RHEL 6 Server v.2:

Source:
kernel-rt-3.10.0-693.35.1.rt56.625.el6rt.src.rpm

noarch:
kernel-rt-doc-3.10.0-693.35.1.rt56.625.el6rt.noarch.rpm
kernel-rt-firmware-3.10.0-693.35.1.rt56.625.el6rt.noarch.rpm

x86_64:
kernel-rt-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm
kernel-rt-debug-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm
kernel-rt-debug-devel-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm
kernel-rt-debuginfo-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm
kernel-rt-devel-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm
kernel-rt-trace-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm
kernel-rt-trace-devel-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm
kernel-rt-vanilla-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm
kernel-rt-vanilla-debuginfo-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm
kernel-rt-vanilla-devel-3.10.0-693.35.1.rt56.625.el6rt.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-2017-13305
https://access.redhat.com/security/cve/CVE-2018-3665
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2018 Red Hat, Inc.
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