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AUSCERT External Security Bulletin Redistribution
Open vSwitch vulnerabilities
31 January 2019
AusCERT Security Bulletin Summary
Operating System: Ubuntu
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2018-17206 CVE-2018-17205 CVE-2018-17204
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USN-3873-1: Open vSwitch vulnerabilities
30 January 2019
A security issue affects these releases of Ubuntu and its derivatives:
Ubuntu 18.04 LTS
Ubuntu 16.04 LTS
Several security issues were fixed in Open vSwitch.
openvswitch - Ethernet virtual switch
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
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)
The problem can be corrected by updating your system to the following package
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:
In general, a standard system update will make all the necessary changes.
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