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RedHat Enterprise Linux 7 RHSA-2018-1318-01 Important Kernel Update

red hat
Calendar Grey May 8, 2018
Scroller Redhat
Vital kernel patch released for Red Hat Enterprise Linux 7, rectifying several important vulnerabilities and issues.
An update for kernel 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 packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* Kernel: KVM: error in exception handling leads to wrong debug stack value (CVE-2018-1087)
* Kernel: error in exception handling leads to DoS (CVE-2018-8897)
* Kernel: ipsec: xfrm: use-after-free leading to potential privilege escalation (CVE-2017-16939)
* kernel: Out-of-bounds write via userland offsets in ebt_entry struct in netfilter/ebtables.c (CVE-2018-1068)
* kernel: ptrace() incorrect error handling leads to corruption and DoS (CVE-2018-1000199)
* kernel: guest kernel crash during core dump on POWER9 host (CVE-2018-1091)
For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.
Red Hat would like to thank Andy Lutomirski for reporting CVE-2018-1087 and CVE-2018-1000199 and Nick Peterson (Everdox Tech LLC) and Andy Lutomirski for reporting CVE-2018-8897.
Bug Fix(es):
These updated kernel packages include also numerous bug fixes. Space precludes documenting all of these bug fixes in this advisory. See the bug fix descriptions in the related Knowledge Article: https://access.redhat.com/articles/3431641

Topics%20covered

Topics Covered

security advisory kernel update bug fix DoS Red Hat Enterprise Linux important

References

https://access.redhat.com/security/cve/CVE-2017-16939 https://access.redhat.com/security/cve/CVE-2018-1068 https://access.redhat.com/security/cve/CVE-2018-1087 https://access.redhat.com/security/cve/CVE-2018-1091 https://access.redhat.com/security/cve/CVE-2018-8897 https://access.redhat.com/security/cve/CVE-2018-1000199 https://access.redhat.com/security/updates/classification#important https://access.redhat.com/articles/3431641

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: kernel-3.10.0-862.2.3.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-862.2.3.el7.noarch.rpm kernel-doc-3.10.0-862.2.3.el7.noarch.rpm
x86_64: kernel-3.10.0-862.2.3.el7.x86_64.rpm kernel-debug-3.10.0-862.2.3.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debug-devel-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-862.2.3.el7.x86_64.rpm kernel-devel-3.10.0-862.2.3.el7.x86_64.rpm kernel-headers-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-libs-3.10.0-862.2.3.el7.x86_64.rpm perf-3.10.0-862.2.3.el7.x86_64.rpm perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm python-perf-3.10.0-862.2.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: kernel-debug-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-862.2.3.el7.x86_64.rpm perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2018:1318-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:1318
Issue date: 2018-05-08

Topic

An update for kernel 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 kernel update bug fix DoS Red Hat Enterprise Linux important

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - noarch, ppc64le, s390x

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - noarch, ppc64le

Bugs Fixed

1517220 - CVE-2017-16939 Kernel: ipsec: xfrm: use-after-free leading to potential privilege escalation

1552048 - CVE-2018-1068 kernel: Out-of-bounds write via userland offsets in ebt_entry struct in netfilter/ebtables.c

1558149 - CVE-2018-1091 kernel: guest kernel crash during core dump on POWER9 host

1566837 - CVE-2018-1087 Kernel: KVM: error in exception handling leads to wrong debug stack value

1567074 - CVE-2018-8897 Kernel: error in exception handling leads to DoS

1568477 - CVE-2018-1000199 kernel: ptrace() incorrect error handling leads to corruption and DoS

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