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Red Hat Security Advisory

Synopsis:          Moderate: kernel-rt security and bug fix update
Advisory ID:       RHSA-2018:3666-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2018:3666
Issue date:        2018-11-26
CVE Names:         CVE-2018-14633 CVE-2018-14646
====================================================================
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 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 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: stack-based buffer overflow in chap_server_compute_md5() in iscsi
target (CVE-2018-14633)

* kernel: NULL pointer dereference in af_netlink.c:__netlink_ns_capable()
allows for denial of service (CVE-2018-14646)

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 Vincent Pelletier for reporting CVE-2018-14633
and Christian Brauner for reporting CVE-2018-14646.

Bug Fix(es):

* The kernel-rt packages have been upgraded to the 3.10.0-957.1.2 source
tree, which provides a number of bug fixes over the previous version.
(BZ#1632386)

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/):

1626035 - CVE-2018-14633 kernel: stack-based buffer overflow in chap_server_compute_md5() in iscsi target
1630124 - CVE-2018-14646 kernel: NULL pointer dereference in af_netlink.c:__netlink_ns_capable() allows for denial of service
1632386 - kernel-rt: update to the RHEL7.6.z batch#1 source tree

6. Package List:

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

Source:
kernel-rt-3.10.0-957.1.3.rt56.913.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-957.1.3.rt56.913.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-debug-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-debug-kvm-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-devel-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-kvm-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-trace-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-trace-kvm-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm

Red Hat Enterprise Linux Realtime (v. 7):

Source:
kernel-rt-3.10.0-957.1.3.rt56.913.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-957.1.3.rt56.913.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-debug-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-devel-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-trace-3.10.0-957.1.3.rt56.913.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-957.1.3.rt56.913.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-2018-14633
https://access.redhat.com/security/cve/CVE-2018-14646
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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