ESB-2019.0275 - [Ubuntu] openvswitch: Denial of service - Remote/unauthenticated 2019-01-31

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0275
                       Open vSwitch vulnerabilities
                              31 January 2019

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

Product:           openvswitch
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-17206 CVE-2018-17205 CVE-2018-17204

Reference:         ESB-2019.0147
                   ESB-2018.3882
                   ESB-2018.3464

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3873-1

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USN-3873-1: Open vSwitch vulnerabilities

30 January 2019
openvswitch vulnerabilities

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

    Ubuntu 18.04 LTS
    Ubuntu 16.04 LTS

Summary

Several security issues were fixed in Open vSwitch.
Software Description

    openvswitch - Ethernet virtual switch

Details

It was discovered that Open vSwitch incorrectly decoded certain packets. A
remote attacker could possibly use this issue to cause Open vSwitch to crash,
resulting in a denial of service. (CVE-2018-17204)

It was discovered that Open vSwitch incorrectly handled processing certain
flows. A remote attacker could possibly use this issue to cause Open vSwitch to
crash, resulting in a denial of service. This issue only affected Ubuntu 18.04
LTS. (CVE-2018-17205)

It was discovered that Open vSwitch incorrectly handled BUNDLE action decoding.
A remote attacker could possibly use this issue to cause Open vSwitch to crash,
resulting in a denial of service. (CVE-2018-17206)

Update instructions

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

Ubuntu 18.04 LTS
    openvswitch-common - 2.9.2-0ubuntu0.18.04.3
Ubuntu 16.04 LTS
    openvswitch-common - 2.5.5-0ubuntu0.16.04.2

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.
References

    CVE-2018-17204
    CVE-2018-17205
    CVE-2018-17206

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