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RedHat: RHSA-2020-3016-01 Important: Kernel-RT Security Fixes and Updates

red hat
Calendar Grey July 21, 2020
Dist Redhat Esm H88
The recent kernel-rt update from Red Hat is crucial for enhancing security, tackling denial-of-service vulnerabilities, and resolving information leak concerns.
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: use-after-free in sound/core/timer.c (CVE-2019-19807)
* kernel: kernel: DAX hugepages not considered during mremap (CVE-2020-10757)
* kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the SSBD protection. (CVE-2020-10766)
* kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available. (CVE-2020-10767)
* kernel: Indirect branch speculation can be enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command. (CVE-2020-10768)
* kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in drivers/net/wireless/marvell/mwifiex/scan.c (CVE-2020-12653)
* kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function in drivers/net/wireless/marvell/mwifiex/wmm.c (CVE-2020-12654)
* Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario (CVE-2020-12888)
* kernel: kvm: Information leak within a KVM guest (CVE-2019-3016)
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.z2 source tree (BZ#1829582)

Topics%20covered

Topics Covered

security advisory information leak buffer overflow DoS Red Hat Enterprise Linux security impact kernel-rt

References

https://access.redhat.com/security/cve/CVE-2019-3016 https://access.redhat.com/security/cve/CVE-2019-19807 https://access.redhat.com/security/cve/CVE-2020-10757 https://access.redhat.com/security/cve/CVE-2020-10766 https://access.redhat.com/security/cve/CVE-2020-10767 https://access.redhat.com/security/cve/CVE-2020-10768 https://access.redhat.com/security/cve/CVE-2020-12653 https://access.redhat.com/security/cve/CVE-2020-12654 https://access.redhat.com/security/cve/CVE-2020-12888 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Real Time for NFV (v. 8):
Source: kernel-rt-4.18.0-193.13.2.rt13.65.el8_2.src.rpm
x86_64: kernel-rt-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm kernel-rt-core-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm kernel-rt-debug-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm kernel-rt-debug-core-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm kernel-rt-debug-devel-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm kernel-rt-debug-kvm-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm kernel-rt-debug-modules-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm kernel-rt-debuginfo-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm kernel-rt-devel-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm kernel-rt-kvm-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm kernel-rt-modules-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm kernel-rt-modules-extra-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
Red Hat Enterprise Linux Real Time (v. 8):
Source: kernel-rt-4.18.0-193.13.2.rt13.65.el8_2.src.rpm
x86_64: kernel-rt-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm kernel-rt-core-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:3016-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3016
Issue date: 2020-07-21

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 information leak buffer overflow DoS Red Hat Enterprise Linux security impact 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

1786078 - CVE-2019-19807 kernel: use-after-free in sound/core/timer.c

1792167 - CVE-2019-3016 kernel: kvm: Information leak within a KVM guest

1831868 - CVE-2020-12653 kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in drivers/net/wireless/marvell/mwifiex/scan.c

1832530 - CVE-2020-12654 kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function in drivers/net/wireless/marvell/mwifiex/wmm.c

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

1842525 - CVE-2020-10757 kernel: kernel: DAX hugepages not considered during mremap

1845840 - CVE-2020-10766 kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the SSBD protection.

1845867 - CVE-2020-10767 kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available.

1845868 - CVE-2020-10768 kernel: Indirect branch speculation can be enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command.

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