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Red Hat: RHSA-2019:1891-01 Important: Kernel-Rt Privilege Escalation

red hat
Calendar Grey July 29, 2019
Dist Redhat Esm H88
Red Hat issued an Important security advisory for kernel-rt addressing critical issues and bug fixes.
An update for kernel-rt is now available for Red Hat Enterprise Linux 7

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: nfs: use-after-free in svc_process_common() (CVE-2018-16884)
* kernel: insufficient input validation in kernel mode driver in Intel i915 graphics leads to privilege escalation (CVE-2019-11085)
* kernel: nfs: NULL pointer dereference due to an anomalized NFS message sequence (CVE-2018-16871)
* 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 RHEL7.6.z batch#6 source tree (BZ#1718400)

Topics%20covered

Topics Covered

security advisory privilege escalation bug fix Red Hat Enterprise Linux important security impact kernel-rt

References

https://access.redhat.com/security/cve/CVE-2018-16871 https://access.redhat.com/security/cve/CVE-2018-16884 https://access.redhat.com/security/cve/CVE-2019-11085 https://access.redhat.com/security/cve/CVE-2019-11811 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-957.27.2.rt56.940.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-957.27.2.rt56.940.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm kernel-rt-debug-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm kernel-rt-devel-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm kernel-rt-kvm-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm kernel-rt-trace-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-957.27.2.rt56.940.el7.x86_64.rpm
Red Hat Enterprise Linux Realtime (v. 7):
Source: kernel-rt-3.10.0-957.27.2.rt56.940.el7.src.rpm
noarch:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:1891-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:1891
Issue date: 2019-07-29

Topic

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 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 privilege escalation bug fix Red Hat Enterprise Linux important security impact kernel-rt

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

Bugs Fixed

1655162 - CVE-2018-16871 kernel: nfs: NULL pointer dereference due to an anomalized NFS message sequence

1660375 - CVE-2018-16884 kernel: nfs: use-after-free in svc_process_common()

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

1718400 - kernel-rt: update to the RHEL7.6.z batch#6 source tree

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