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Red Hat Security Advisory 2020-4289-01

Red Hat Security Advisory 2020-4289-01
Posted Oct 20, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-4289-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include an information leakage vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2020-12351, CVE-2020-12352, CVE-2020-14331, CVE-2020-14385, CVE-2020-14386
MD5 | 51c6fb98b1d3707da3d7531842005a5d

Red Hat Security Advisory 2020-4289-01

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=====================================================================
Red Hat Security Advisory

Synopsis: Important: kernel-rt security and bug fix update
Advisory ID: RHSA-2020:4289-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:4289
Issue date: 2020-10-20
CVE Names: CVE-2020-12351 CVE-2020-12352 CVE-2020-14331
CVE-2020-14385 CVE-2020-14386
=====================================================================

1. Summary:

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.

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 Real Time (v. 8) - x86_64
Red Hat Enterprise Linux Real Time for NFV (v. 8) - 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: net: bluetooth: type confusion while processing AMP packets
(CVE-2020-12351)

* kernel: net: bluetooth: information leak when processing certain AMP
packets (CVE-2020-12352)

* kernel: metadata validator in XFS may cause an inode with a valid,
user-creatable extended attribute to be flagged as corrupt (CVE-2020-14385)

* kernel: memory corruption in net/packet/af_packet.c leads to elevation of
privilege (CVE-2020-14386)

* kernel: kernel: buffer over write in vgacon_scroll (CVE-2020-14331)

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-rt: update RT source tree to the RHEL-8.2.z Batch#4 source tree
(BZ#1877921)

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/):

1858679 - CVE-2020-14331 kernel: kernel: buffer over write in vgacon_scroll
1874800 - CVE-2020-14385 kernel: metadata validator in XFS may cause an inode with a valid, user-creatable extended attribute to be flagged as corrupt
1875699 - CVE-2020-14386 kernel: memory corruption in net/packet/af_packet.c leads to elevation of privilege
1886521 - CVE-2020-12351 kernel: net: bluetooth: type confusion while processing AMP packets
1886529 - CVE-2020-12352 kernel: net: bluetooth: information leak when processing certain AMP packets

6. Package List:

Red Hat Enterprise Linux Real Time for NFV (v. 8):

Source:
kernel-rt-4.18.0-193.28.1.rt13.77.el8_2.src.rpm

x86_64:
kernel-rt-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-core-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debug-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debug-core-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debug-devel-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debug-kvm-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debug-modules-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debuginfo-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-devel-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-kvm-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-modules-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-modules-extra-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm

Red Hat Enterprise Linux Real Time (v. 8):

Source:
kernel-rt-4.18.0-193.28.1.rt13.77.el8_2.src.rpm

x86_64:
kernel-rt-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-core-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debug-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debug-core-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debug-devel-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debug-modules-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debuginfo-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-devel-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-modules-4.18.0-193.28.1.rt13.77.el8_2.x86_64.rpm
kernel-rt-modules-extra-4.18.0-193.28.1.rt13.77.el8_2.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-2020-12351
https://access.redhat.com/security/cve/CVE-2020-12352
https://access.redhat.com/security/cve/CVE-2020-14331
https://access.redhat.com/security/cve/CVE-2020-14385
https://access.redhat.com/security/cve/CVE-2020-14386
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/BleedingTooth

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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