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Red Hat: RHSA-2020-4289-01 Important Update: Kernel-RT Security Issues

red hat
Calendar Grey October 20, 2020
Dist Redhat Esm H88
Ubuntu's announcement emphasizes critical patches for kernel security flaws, updates on system stability, and CVSS ratings for detected vulnerabilities.
An update for kernel-rt is now available for Red Hat Enterprise Linux 8

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.

Summary

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)

Topics%20covered

Topics Covered

security advisory Red Hat information leak privilege escalation bug fix important update kernel-rt

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

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

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

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

Topic

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 impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat information leak privilege escalation bug fix important update kernel-rt

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

Bugs Fixed

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

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