Twenty Year Anniversary

Ubuntu Security Notice USN-3732-2

Ubuntu Security Notice USN-3732-2
Posted Aug 7, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3732-2 - USN-3732-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 18.04 LTS for Ubuntu 16.04 LTS. Juha-Matti Tilli discovered that the TCP implementation in the Linux kernel performed algorithmically expensive operations in some situations when handling incoming packets. A remote attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service, kernel, tcp, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-5390
MD5 | 802eb3abdd14bdadb5da2e1595870840

Ubuntu Security Notice USN-3732-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3732-2
August 06, 2018

linux-hwe, linux-azure, linux-gcp vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

The system could be made unavailable if it received specially crafted
network traffic.

Software Description:
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

USN-3732-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu
16.04 LTS.

Juha-Matti Tilli discovered that the TCP implementation in the Linux kernel
performed algorithmically expensive operations in some situations when
handling incoming packets. A remote attacker could use this to cause a
denial of service.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS:
linux-image-4.15.0-1015-gcp 4.15.0-1015.15~16.04.1
linux-image-4.15.0-1019-azure 4.15.0-1019.19~16.04.1
linux-image-4.15.0-30-generic 4.15.0-30.32~16.04.1
linux-image-4.15.0-30-generic-lpae 4.15.0-30.32~16.04.1
linux-image-4.15.0-30-lowlatency 4.15.0-30.32~16.04.1
linux-image-azure 4.15.0.1019.25
linux-image-gcp 4.15.0.1015.27
linux-image-generic-hwe-16.04 4.15.0.30.52
linux-image-generic-lpae-hwe-16.04 4.15.0.30.52
linux-image-gke 4.15.0.1015.27
linux-image-lowlatency-hwe-16.04 4.15.0.30.52

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
https://usn.ubuntu.com/usn/usn-3732-2
https://usn.ubuntu.com/usn/usn-3732-1
CVE-2018-5390

Package Information:
https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1019.19~16.04.1
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1015.15~16.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-30.32~16.04.1

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

December 2018

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Dec 1st
    11 Files
  • 2
    Dec 2nd
    1 Files
  • 3
    Dec 3rd
    18 Files
  • 4
    Dec 4th
    40 Files
  • 5
    Dec 5th
    16 Files
  • 6
    Dec 6th
    50 Files
  • 7
    Dec 7th
    12 Files
  • 8
    Dec 8th
    1 Files
  • 9
    Dec 9th
    1 Files
  • 10
    Dec 10th
    15 Files
  • 11
    Dec 11th
    20 Files
  • 12
    Dec 12th
    0 Files
  • 13
    Dec 13th
    0 Files
  • 14
    Dec 14th
    0 Files
  • 15
    Dec 15th
    0 Files
  • 16
    Dec 16th
    0 Files
  • 17
    Dec 17th
    0 Files
  • 18
    Dec 18th
    0 Files
  • 19
    Dec 19th
    0 Files
  • 20
    Dec 20th
    0 Files
  • 21
    Dec 21st
    0 Files
  • 22
    Dec 22nd
    0 Files
  • 23
    Dec 23rd
    0 Files
  • 24
    Dec 24th
    0 Files
  • 25
    Dec 25th
    0 Files
  • 26
    Dec 26th
    0 Files
  • 27
    Dec 27th
    0 Files
  • 28
    Dec 28th
    0 Files
  • 29
    Dec 29th
    0 Files
  • 30
    Dec 30th
    0 Files
  • 31
    Dec 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2018 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close