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Red Hat: RHSA-2019:1971-01 Important: Kernel-RT Denial Of Service

red hat
Calendar Grey July 30, 2019
Dist Redhat Esm H88
Obtain essential enhancements for kernel-rt within Red Hat Enterprise Linux 8, targeting significant security vulnerabilities and system bugs.
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: insufficient input validation in kernel mode driver in Intel i915 graphics leads to privilege escalation (CVE-2019-11085)
* kernel: DMA attack using peripheral devices (Thunderclap) (BZ#1690716)
* kernel: infinite loop in update_blocked_averages() in kernel/sched/fair.c leading to denial of service (CVE-2018-20784)
* kernel: a NULL pointer dereference in drivers/scsi/megaraid/megaraid_sas_base.c leading to DoS (CVE-2019-11810)
* kernel: use-after-free in drivers/char/ipmi/ipmi_si_intf.c, ipmi_si_mem_io.c, ipmi_si_port_io.c (CVE-2019-11811)
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 to the RHEL8.0.z batch#2 source tree (BZ#1717516)

Topics%20covered

Topics Covered

security advisory denial of service privilege escalation bug fix important red hat enterprise linux kernel-rt

References

https://access.redhat.com/security/cve/CVE-2018-20784 https://access.redhat.com/security/cve/CVE-2019-11085 https://access.redhat.com/security/cve/CVE-2019-11810 https://access.redhat.com/security/cve/CVE-2019-11811 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Real Time for NFV (v. 8):
Source: kernel-rt-4.18.0-80.7.1.rt9.153.el8_0.src.rpm
x86_64: kernel-rt-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-core-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-debug-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-debug-core-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-debug-devel-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-debug-kvm-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-debug-kvm-debuginfo-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-debug-modules-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-debuginfo-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-devel-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-kvm-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-kvm-debuginfo-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-modules-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm kernel-rt-modules-extra-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm
Red Hat Enterprise Linux Real Time (v. 8):
Source: kernel-rt-4.18.0-80.7.1.rt9.153.el8_0.src.rpm
x86_64: kernel-rt-4.18.0-80.7.1.rt9.153.el8_0.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:1971-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:1971
Issue date: 2019-07-30

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 denial of service privilege escalation bug fix important red hat enterprise linux 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

1680540 - CVE-2018-20784 kernel: infinite loop in update_blocked_averages() in kernel/sched/fair.c leading to denial of service

1690716 - kernel: DMA attack using peripheral devices (Thunderclap)

1709164 - CVE-2019-11810 kernel: a NULL pointer dereference in drivers/scsi/megaraid/megaraid_sas_base.c leading to DoS

1709180 - CVE-2019-11811 kernel: use-after-free in drivers/char/ipmi/ipmi_si_intf.c, ipmi_si_mem_io.c, ipmi_si_port_io.c

1710405 - CVE-2019-11085 kernel: insufficient input validation in kernel mode driver in Intel i915 graphics leads to privilege escalation

1717516 - kernel-rt: update to the RHEL8.0.z batch#2 source tree

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