ESB-2018.2709 - [Ubuntu] linux kernel: Denial of service - Remote/unauthenticated 2018-09-12

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.2709
                        Linux kernel vulnerability
                             12 September 2018

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           linux kernel
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-5390  

Reference:         ESB-2018.2275
                   ESB-2018.2271

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3763-1

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Ubuntu Security Notice USN-3763-1
September 11, 2018

linux vulnerability
==========================================================================

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

- - Ubuntu 12.04 ESM

Summary:

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

Software Description:
- - linux: Linux kernel

Details:

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 12.04 ESM:
  linux-image-3.2.0-135-generic   3.2.0-135.181
  linux-image-3.2.0-135-generic-pae  3.2.0-135.181
  linux-image-3.2.0-135-highbank  3.2.0-135.181
  linux-image-3.2.0-135-omap      3.2.0-135.181
  linux-image-3.2.0-135-powerpc-smp  3.2.0-135.181
  linux-image-3.2.0-135-powerpc64-smp  3.2.0-135.181
  linux-image-3.2.0-135-virtual   3.2.0-135.181
  linux-image-generic             3.2.0.135.150
  linux-image-generic-pae         3.2.0.135.150
  linux-image-highbank            3.2.0.135.150
  linux-image-omap                3.2.0.135.150
  linux-image-powerpc-smp         3.2.0.135.150
  linux-image-powerpc64-smp       3.2.0.135.150
  linux-image-virtual             3.2.0.135.150

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-3763-1
  CVE-2018-5390

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===========================================================================
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