Red Hat Enterprise Linux 7.4: RHSA-2018-3540 Important Kernel Bug Fix
Nov 13, 2018
•
LinuxSecurity Advisories
6 - 11 min read
An update for kernel is now available for Red Hat Enterprise Linux 7.4 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score,
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Hash: SHA256
==================================================================== Red Hat Security Advisory
Synopsis: Important: kernel security, bug fix, and enhancement update
Advisory ID: RHSA-2018:3540-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:3540
Issue date: 2018-11-13
CVE Names: CVE-2017-18344 CVE-2018-5391 CVE-2018-10675
CVE-2018-14634
====================================================================
1. Summary:
An update for kernel is now available for Red Hat Enterprise Linux 7.4
Extended Update Support.
Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux ComputeNode EUS (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) - x86_64
Red Hat Enterprise Linux Server EUS (v. 7.4) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 7.4) - ppc64, ppc64le, x86_64
3. Description:
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es):
* A flaw named FragmentSmack was found in the way the Linux kernel handled
reassembly of fragmented IPv4 and IPv6 packets. A remote attacker could use
this flaw to trigger time and calculation expensive fragment reassembly
algorithm by sending specially crafted packets which could lead to a CPU
saturation and hence a denial of service on the system. (CVE-2018-5391)
* kernel: out-of-bounds access in the show_timer function in
kernel/time/posix-timers.c (CVE-2017-18344)
* kernel: mm: use-after-free in do_get_mempolicy function allows local DoS
or other unspecified impact (CVE-2018-10675)
* kernel: Integer overflow in Linux's create_elf_tables function
(CVE-2018-14634)
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 Juha-Matti Tilli (Aalto University - Department
of Communications and Networking and Nokia Bell Labs) for reporting
CVE-2018-5391 and Qualys Research Labs for reporting CVE-2018-14634.
Bug Fix(es):
These updated kernel packages include also numerous bug fixes. Space
precludes documenting all of the bug fixes in this advisory. See the
descriptions in the related Knowledge Article:
https://access.redhat.com/articles/3684891
4. 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.
5. Bugs fixed (https://bugzilla.redhat.com/):
1575065 - CVE-2018-10675 kernel: mm: use-after-free in do_get_mempolicy function allows local DoS or other unspecified impact
1609664 - CVE-2018-5391 kernel: IP fragments with random offsets allow a remote denial of service (FragmentSmack)
1610958 - CVE-2017-18344 kernel: out-of-bounds access in the show_timer function in kernel/time/posix-timers.c
1624498 - CVE-2018-14634 kernel: Integer overflow in Linux's create_elf_tables function
6. Package List:
Red Hat Enterprise Linux ComputeNode EUS (v. 7.4):
Source:
kernel-3.10.0-693.43.1.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-693.43.1.el7.noarch.rpm
kernel-doc-3.10.0-693.43.1.el7.noarch.rpm
x86_64:
kernel-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.43.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.43.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.43.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.43.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.43.1.el7.x86_64.rpm
perf-3.10.0-693.43.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
python-perf-3.10.0-693.43.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4):
x86_64:
kernel-debug-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.43.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.43.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 7.4):
Source:
kernel-3.10.0-693.43.1.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-693.43.1.el7.noarch.rpm
kernel-doc-3.10.0-693.43.1.el7.noarch.rpm
ppc64:
kernel-3.10.0-693.43.1.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-693.43.1.el7.ppc64.rpm
kernel-debug-3.10.0-693.43.1.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-693.43.1.el7.ppc64.rpm
kernel-debug-devel-3.10.0-693.43.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-693.43.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-693.43.1.el7.ppc64.rpm
kernel-devel-3.10.0-693.43.1.el7.ppc64.rpm
kernel-headers-3.10.0-693.43.1.el7.ppc64.rpm
kernel-tools-3.10.0-693.43.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-693.43.1.el7.ppc64.rpm
kernel-tools-libs-3.10.0-693.43.1.el7.ppc64.rpm
perf-3.10.0-693.43.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-693.43.1.el7.ppc64.rpm
python-perf-3.10.0-693.43.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-693.43.1.el7.ppc64.rpm
ppc64le:
kernel-3.10.0-693.43.1.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-693.43.1.el7.ppc64le.rpm
kernel-debug-3.10.0-693.43.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-693.43.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-693.43.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-693.43.1.el7.ppc64le.rpm
kernel-devel-3.10.0-693.43.1.el7.ppc64le.rpm
kernel-headers-3.10.0-693.43.1.el7.ppc64le.rpm
kernel-tools-3.10.0-693.43.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-693.43.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-693.43.1.el7.ppc64le.rpm
perf-3.10.0-693.43.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-693.43.1.el7.ppc64le.rpm
python-perf-3.10.0-693.43.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-693.43.1.el7.ppc64le.rpm
s390x:
kernel-3.10.0-693.43.1.el7.s390x.rpm
kernel-debug-3.10.0-693.43.1.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-693.43.1.el7.s390x.rpm
kernel-debug-devel-3.10.0-693.43.1.el7.s390x.rpm
kernel-debuginfo-3.10.0-693.43.1.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-693.43.1.el7.s390x.rpm
kernel-devel-3.10.0-693.43.1.el7.s390x.rpm
kernel-headers-3.10.0-693.43.1.el7.s390x.rpm
kernel-kdump-3.10.0-693.43.1.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-693.43.1.el7.s390x.rpm
kernel-kdump-devel-3.10.0-693.43.1.el7.s390x.rpm
perf-3.10.0-693.43.1.el7.s390x.rpm
perf-debuginfo-3.10.0-693.43.1.el7.s390x.rpm
python-perf-3.10.0-693.43.1.el7.s390x.rpm
python-perf-debuginfo-3.10.0-693.43.1.el7.s390x.rpm
x86_64:
kernel-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.43.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.43.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.43.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.43.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.43.1.el7.x86_64.rpm
perf-3.10.0-693.43.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
python-perf-3.10.0-693.43.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional EUS (v. 7.4):
ppc64:
kernel-debug-debuginfo-3.10.0-693.43.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-693.43.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-693.43.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-693.43.1.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-693.43.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-693.43.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-693.43.1.el7.ppc64.rpm
ppc64le:
kernel-debug-debuginfo-3.10.0-693.43.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-693.43.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-693.43.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-693.43.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-693.43.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-693.43.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-693.43.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-693.43.1.el7.ppc64le.rpm
x86_64:
kernel-debug-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.43.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.43.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2017-18344
https://access.redhat.com/security/cve/CVE-2018-5391
https://access.redhat.com/security/cve/CVE-2018-10675
https://access.redhat.com/security/cve/CVE-2018-14634
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/articles/3553061
https://access.redhat.com/security/vulnerabilities/mutagen-astronomy
https://access.redhat.com/articles/3684891
8. Contact:
The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2018 Red Hat, Inc.
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Red Hat Enterprise Linux 7.4: RHSA-2018-3540 Important Kernel Bug Fix
red hat
November 13, 2018
An update for kernel is now available for Red Hat Enterprise Linux 7.4 Extended Update Support
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):
* A flaw named FragmentSmack was found in the way the Linux kernel handled
reassembly of fragmented IPv4 and IPv6 packets. A remote attacker could use
this flaw to trigger time and calculation expensive fragment reassembly
algorithm by sending specially crafted packets which could lead to a CPU
saturation and hence a denial of service on the system. (CVE-2018-5391)
* kernel: out-of-bounds access in the show_timer function in
kernel/time/posix-timers.c (CVE-2017-18344)
* kernel: mm: use-after-free in do_get_mempolicy function allows local DoS
or other unspecified impact (CVE-2018-10675)
* kernel: Integer overflow in Linux's create_elf_tables function
(CVE-2018-14634)
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 Juha-Matti Tilli (Aalto University - Department
of Communications and Networking and Nokia Bell Labs) for reporting
CVE-2018-5391 and Qualys Research Labs for reporting CVE-2018-14634.
Bug Fix(es):
These updated kernel packages include also numerous bug fixes. Space
precludes documenting all of the bug fixes in this advisory. See the
descriptions in the related Knowledge Article:
https://access.redhat.com/articles/3684891
References
https://access.redhat.com/security/cve/CVE-2017-18344 https://access.redhat.com/security/cve/CVE-2018-5391 https://access.redhat.com/security/cve/CVE-2018-10675 https://access.redhat.com/security/cve/CVE-2018-14634 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/articles/3553061 https://access.redhat.com/security/vulnerabilities/mutagen-astronomy https://access.redhat.com/articles/3684891
Package List
Red Hat Enterprise Linux ComputeNode EUS (v. 7.4):
Source:
kernel-3.10.0-693.43.1.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-693.43.1.el7.noarch.rpm
kernel-doc-3.10.0-693.43.1.el7.noarch.rpm
x86_64:
kernel-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.43.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.43.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.43.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.43.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.43.1.el7.x86_64.rpm
perf-3.10.0-693.43.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
python-perf-3.10.0-693.43.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4):
x86_64:
kernel-debug-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.43.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.43.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.43.1.el7.x86_64.rpm
Read the Full Advisory
Severity
important
Lowest
Low
Medium
High
Critical
Advisory ID: RHSA-2018:3540-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:3540
Issue date: 2018-11-13
Topic
An update for kernel is now available for Red Hat Enterprise Linux 7.4Extended Update Support.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.
Relevant Releases Architectures
Red Hat Enterprise Linux ComputeNode EUS (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) - x86_64
Red Hat Enterprise Linux Server EUS (v. 7.4) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 7.4) - ppc64, ppc64le, x86_64
Bugs Fixed
1575065 - CVE-2018-10675 kernel: mm: use-after-free in do_get_mempolicy function allows local DoS or other unspecified impact
1609664 - CVE-2018-5391 kernel: IP fragments with random offsets allow a remote denial of service (FragmentSmack)
1610958 - CVE-2017-18344 kernel: out-of-bounds access in the show_timer function in kernel/time/posix-timers.c
1624498 - CVE-2018-14634 kernel: Integer overflow in Linux's create_elf_tables function
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