RedHat: RHSA-2018-2645:01 Important: kernel security update
Summary
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es):
* A flaw named SegmentSmack was found in the way the Linux kernel handled
specially crafted TCP packets. A remote attacker could use this flaw to
trigger time and calculation expensive calls to tcp_collapse_ofo_queue()
and tcp_prune_ofo_queue() functions by sending specially modified packets
within ongoing TCP sessions which could lead to a CPU saturation and hence
a denial of service on the system. Maintaining the denial of service
condition requires continuous two-way TCP sessions to a reachable open
port, thus the attacks cannot be performed using spoofed IP addresses.
(CVE-2018-5390)
Red Hat would like to thank Juha-Matti Tilli (Aalto University, Department
of Communications and Networking and Nokia Bell Labs) for reporting this
issue.
Summary
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.
References
https://access.redhat.com/security/cve/CVE-2018-5390 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/cve/cve-2018-5390
Package List
Red Hat Enterprise Linux HPC Node EUS (v. 6.7):
Source:
kernel-2.6.32-573.62.1.el6.src.rpm
noarch:
kernel-abi-whitelists-2.6.32-573.62.1.el6.noarch.rpm
kernel-doc-2.6.32-573.62.1.el6.noarch.rpm
kernel-firmware-2.6.32-573.62.1.el6.noarch.rpm
x86_64:
kernel-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debug-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-573.62.1.el6.i686.rpm
kernel-debug-devel-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-573.62.1.el6.x86_64.rpm
kernel-devel-2.6.32-573.62.1.el6.x86_64.rpm
kernel-headers-2.6.32-573.62.1.el6.x86_64.rpm
perf-2.6.32-573.62.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
perf-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7):
x86_64:
kernel-debug-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-573.62.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
python-perf-2.6.32-573.62.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 6.7):
Source:
kernel-2.6.32-573.62.1.el6.src.rpm
i386:
kernel-2.6.32-573.62.1.el6.i686.rpm
kernel-debug-2.6.32-573.62.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debug-devel-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-573.62.1.el6.i686.rpm
kernel-devel-2.6.32-573.62.1.el6.i686.rpm
kernel-headers-2.6.32-573.62.1.el6.i686.rpm
perf-2.6.32-573.62.1.el6.i686.rpm
perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
noarch:
kernel-abi-whitelists-2.6.32-573.62.1.el6.noarch.rpm
kernel-doc-2.6.32-573.62.1.el6.noarch.rpm
kernel-firmware-2.6.32-573.62.1.el6.noarch.rpm
ppc64:
kernel-2.6.32-573.62.1.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-573.62.1.el6.ppc64.rpm
kernel-debug-2.6.32-573.62.1.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
kernel-debug-devel-2.6.32-573.62.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-573.62.1.el6.ppc64.rpm
kernel-devel-2.6.32-573.62.1.el6.ppc64.rpm
kernel-headers-2.6.32-573.62.1.el6.ppc64.rpm
perf-2.6.32-573.62.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
s390x:
kernel-2.6.32-573.62.1.el6.s390x.rpm
kernel-debug-2.6.32-573.62.1.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
kernel-debug-devel-2.6.32-573.62.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-573.62.1.el6.s390x.rpm
kernel-devel-2.6.32-573.62.1.el6.s390x.rpm
kernel-headers-2.6.32-573.62.1.el6.s390x.rpm
kernel-kdump-2.6.32-573.62.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
kernel-kdump-devel-2.6.32-573.62.1.el6.s390x.rpm
perf-2.6.32-573.62.1.el6.s390x.rpm
perf-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
x86_64:
kernel-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debug-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-573.62.1.el6.i686.rpm
kernel-debug-devel-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-573.62.1.el6.x86_64.rpm
kernel-devel-2.6.32-573.62.1.el6.x86_64.rpm
kernel-headers-2.6.32-573.62.1.el6.x86_64.rpm
perf-2.6.32-573.62.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
perf-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server Optional EUS (v. 6.7):
i386:
kernel-debug-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-573.62.1.el6.i686.rpm
perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
python-perf-2.6.32-573.62.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
ppc64:
kernel-debug-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-573.62.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
python-perf-2.6.32-573.62.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
s390x:
kernel-debug-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-573.62.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
perf-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
python-perf-2.6.32-573.62.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
x86_64:
kernel-debug-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-573.62.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
python-perf-2.6.32-573.62.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.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/
Topic
An update for kernel is now available for Red Hat Enterprise Linux 6.7Extended 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.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux HPC Node EUS (v. 6.7) - noarch, x86_64
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) - x86_64
Red Hat Enterprise Linux Server EUS (v. 6.7) - i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 6.7) - i386, ppc64, s390x, x86_64
Bugs Fixed
1601704 - CVE-2018-5390 kernel: TCP segments with random offsets allow a remote denial of service (SegmentSmack)