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Ubuntu Security Notice USN-4729-1
February 10, 2021

openvswitch vulnerability
==========================================================================

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

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Open vSwitch could be made to crash or perform unexpectedly if it received
specially crafted network traffic.

Software Description:
- openvswitch: Ethernet virtual switch

Details:

Joakim Hindersson discovered that Open vSwitch incorrectly parsed certain
network packets. A remote attacker could use this issue to cause a denial
of service, or possibly alter packet classification.

Update instructions:

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

Ubuntu 20.10:
  openvswitch-common              2.13.1-0ubuntu1.3

Ubuntu 20.04 LTS:
  openvswitch-common              2.13.1-0ubuntu0.20.04.4

Ubuntu 18.04 LTS:
  openvswitch-common              2.9.8-0ubuntu0.18.04.2

Ubuntu 16.04 LTS:
  openvswitch-common              2.5.9-0ubuntu0.16.04.3

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

References:
  https://usn.ubuntu.com/4729-1
  CVE-2020-35498

Package Information:
  https://launchpad.net/ubuntu/+source/openvswitch/2.13.1-0ubuntu1.3
  https://launchpad.net/ubuntu/+source/openvswitch/2.13.1-0ubuntu0.20.04.4
  https://launchpad.net/ubuntu/+source/openvswitch/2.9.8-0ubuntu0.18.04.2
  https://launchpad.net/ubuntu/+source/openvswitch/2.5.9-0ubuntu0.16.04.3