[USN-6690-1] Open vSwitch vulnerabilities

[Marc Deslauriers]

==========================================================================
Ubuntu Security Notice USN-6690-1
March 12, 2024

openvswitch vulnerabilities
==========================================================================

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

- Ubuntu 23.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in Open vSwitch.

Software Description:
- openvswitch: Ethernet virtual switch

Details:

Timothy Redaelli and Haresh Khandelwal discovered that Open vSwitch
incorrectly handled certain crafted Geneve packets when hardware offloading
via the netlink path is enabled. A remote attacker could possibly use this
issue to cause Open vSwitch to crash, leading to a denial of service.
(CVE-2023-3966)

It was discovered that Open vSwitch incorrectly handled certain ICMPv6
Neighbor Advertisement packets. A remote attacker could possibly use this
issue to redirect traffic to arbitrary IP addresses. (CVE-2023-5366)

Update instructions:

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

Ubuntu 23.10:
   openvswitch-common              3.2.2-0ubuntu0.23.10.1
   python3-openvswitch             3.2.2-0ubuntu0.23.10.1

Ubuntu 22.04 LTS:
   openvswitch-common              2.17.9-0ubuntu0.22.04.1
   python3-openvswitch             2.17.9-0ubuntu0.22.04.1

Ubuntu 20.04 LTS:
   openvswitch-common              2.13.8-0ubuntu1.4
   python3-openvswitch             2.13.8-0ubuntu1.4

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References:
   https://ubuntu.com/security/notices/USN-6690-1
   CVE-2023-3966, CVE-2023-5366

Package Information:
   https://launchpad.net/ubuntu/+source/openvswitch/3.2.2-0ubuntu0.23.10.1
   https://launchpad.net/ubuntu/+source/openvswitch/2.17.9-0ubuntu0.22.04.1
   https://launchpad.net/ubuntu/+source/openvswitch/2.13.8-0ubuntu1.4

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