ESB-2018.0648 - [RedHat] kernel-rt: Multiple vulnerabilities 2018-03-07

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.0648
             Important: kernel-rt security and bug fix update
                               7 March 2018

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

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

Product:           kernel-rt
Publisher:         Red Hat
Operating System:  Red Hat
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Increased Privileges            -- Existing Account
                   Denial of Service               -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-12188 CVE-2017-7518 

Reference:         ESB-2017.2852
                   ESB-2017.2807
                   ESB-2017.2751
                   ESB-2017.2729
                   ESB-2017.2401

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2018:0412

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                   Red Hat Security Advisory

Synopsis:          Important: kernel-rt security and bug fix update
Advisory ID:       RHSA-2018:0412-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2018:0412
Issue date:        2018-03-06
CVE Names:         CVE-2017-7518 CVE-2017-12188 
=====================================================================

1. Summary:

An update for kernel-rt is now available for Red Hat Enterprise Linux 7.

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 Realtime (v. 7) - noarch, x86_64
Red Hat Enterprise Linux for Real Time for NFV (v. 7) - 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: KVM: MMU potential stack buffer overrun during page walks
(CVE-2017-12188, Important)

* Kernel: KVM: debug exception via syscall emulation (CVE-2017-7518,
Moderate)

Bug Fix(es):

* The kernel-rt packages have been upgraded to the 3.10.0-693.21.1 source
tree, which provides a number of bug fixes over the previous version.
(BZ#1537671)

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/):

1464473 - CVE-2017-7518 Kernel: KVM: debug exception via syscall emulation
1500380 - CVE-2017-12188 Kernel: KVM: MMU potential stack buffer overrun during page walks
1537671 - kernel-rt: update to the RHEL7.4.z batch#5 source tree

6. Package List:

Red Hat Enterprise Linux for Real Time for NFV (v. 7):

Source:
kernel-rt-3.10.0-693.21.1.rt56.639.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-693.21.1.rt56.639.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-debug-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-debug-kvm-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-devel-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-kvm-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-trace-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-trace-kvm-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm

Red Hat Enterprise Linux Realtime (v. 7):

Source:
kernel-rt-3.10.0-693.21.1.rt56.639.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-693.21.1.rt56.639.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-debug-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-devel-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-trace-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-693.21.1.rt56.639.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-693.21.1.rt56.639.el7.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-2017-7518
https://access.redhat.com/security/cve/CVE-2017-12188
https://access.redhat.com/security/updates/classification/#important

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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