An Open vSwitch security update has been released for Ubuntu 16.04 LTS, 18.04 LTS, 20.04 LTS, and 20.10.

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Ubuntu Security Notice USN-4691-1
January 13, 2021

openvswitch vulnerabilities
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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:

Several security issues were fixed in Open vSwitch.

Software Description:
- openvswitch: Ethernet virtual switch

Details:

Jonas Rudloff discovered that Open vSwitch incorrectly handled certain
malformed LLDP packets. A remote attacker could use this issue to cause
Open vSwitch to crash, resulting in a denial of service, or possibly
execute arbitrary code.

Update instructions:

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

Ubuntu 20.10:
openvswitch-common 2.13.1-0ubuntu1.2

Ubuntu 20.04 LTS:
openvswitch-common 2.13.1-0ubuntu0.20.04.3

Ubuntu 18.04 LTS:
openvswitch-common 2.9.7-0ubuntu0.18.04.2

Ubuntu 16.04 LTS:
openvswitch-common 2.5.9-0ubuntu0.16.04.2

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

References:
  https://usn.ubuntu.com/4691-1
CVE-2015-8011, CVE-2020-27827

Package Information:
  https://launchpad.net/ubuntu/+source/openvswitch/2.13.1-0ubuntu1.2
  https://launchpad.net/ubuntu/+source/openvswitch/2.13.1-0ubuntu0.20.04.3
  https://launchpad.net/ubuntu/+source/openvswitch/2.9.7-0ubuntu0.18.04.2
  https://launchpad.net/ubuntu/+source/openvswitch/2.5.9-0ubuntu0.16.04.2