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Red Hat Security Advisory 2020-2665-01

Red Hat Security Advisory 2020-2665-01
Posted Jun 23, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-2665-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include a denial of service vulnerability.

tags | advisory, denial of service, kernel
systems | linux, redhat
advisories | CVE-2020-12888
MD5 | 49853faed2a94352fb8dbc5de3961601

Red Hat Security Advisory 2020-2665-01

Change Mirror Download
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====================================================================
Red Hat Security Advisory

Synopsis: Important: kernel-rt security and bug fix update
Advisory ID: RHSA-2020:2665-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:2665
Issue date: 2020-06-23
CVE Names: CVE-2020-12888
====================================================================
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: vfio: access to disabled MMIO space of some devices may lead to
DoS scenario (CVE-2020-12888)

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

Bug Fix(es):

* kernel: hw: provide reporting and microcode mitigation toggle for
CVE-2020-0543 / Special Register Buffer Data Sampling (SRBDS) (BZ#1827198)

* kernel-rt: update to the latest RHEL7.8.z source tree (BZ#1844620)

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/):

1836244 - CVE-2020-12888 Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario

6. Package List:

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

Source:
kernel-rt-3.10.0-1127.13.1.rt56.1110.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-1127.13.1.rt56.1110.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-debug-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-debug-kvm-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-devel-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-kvm-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-trace-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-trace-kvm-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm

Red Hat Enterprise Linux Realtime (v. 7):

Source:
kernel-rt-3.10.0-1127.13.1.rt56.1110.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-1127.13.1.rt56.1110.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-debug-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-devel-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-trace-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-1127.13.1.rt56.1110.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-3.10.0-1127.13.1.rt56.1110.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-2020-12888
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/solutions/5142691

8. Contact:

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

Copyright 2020 Red Hat, Inc.
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