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Ubuntu Security Notice USN-6514-1
November 26, 2023
openvswitch vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
Summary:
Open vSwitch could be made to expose sensitive information over the
network.
Software Description:
- openvswitch: Ethernet virtual switch
Details:
It was discovered that Open vSwitch did not correctly handle OpenFlow
rules for ICMPv6 Neighbour Advertisement packets. A local attacker could
possibly use this issue to redirect traffic to arbitrary IP addresses.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS:
   openvswitch-common              2.13.8-0ubuntu1.3
Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   openvswitch-common              2.9.8-0ubuntu0.18.04.5+esm1
In general, a standard system update will make all the necessary changes.
References:
   https://ubuntu.com/security/notices/USN-6514-1
   CVE-2023-5366
Package Information:
   https://launchpad.net/ubuntu/+source/openvswitch/2.13.8-0ubuntu1.3