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Ubuntu 22.04 LTS USN-6067-1 Critical: OpenStack Neutron Denial of Service

ubuntu
Calendar Grey May 10, 2023
Dist Ubuntu Esm H88
Ubuntu 22.04 LTS resolves OpenStack Nova challenges impacting instance management and system reliability.
Several security issues were fixed in OpenStack Neutron.

Summary

Several security issues were fixed in OpenStack Neutron.

Software Description:

- neutron: OpenStack Virtual Network Service

Details:

David Sinquin discovered that OpenStack Neutron incorrectly handled the

default Open vSwitch firewall rules. An attacker could possibly use this

issue to impersonate the IPv6 addresses of other systems on the network.

This issue only affected Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS.

(CVE-2021-20267)

Jake Yip and Justin Mammarella discovered that OpenStack Neutron

incorrectly handled the linuxbridge driver when ebtables-nft is being

used. An attacker could possibly use this issue to impersonate the hardware

addresss of other systems on the network. This issue only affected Ubuntu

18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2021-38598)

Pavel Toporkov discovered that OpenStack Neutron incorrectly handled

extra_dhcp_opts values. An attacker could possibly use this issue to

reconfigure dnsmasq. This issue only affected Ubuntu 18.04 LTS,...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu network service OpenStack

Update Instructions

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

Ubuntu 22.04 LTS:
   python3-neutron                 2:20.3.0-0ubuntu1.1

Ubuntu 20.04 LTS:
   python3-neutron                 2:16.4.2-0ubuntu6.2

Ubuntu 18.04 LTS:
   python-neutron                  2:12.1.1-0ubuntu8.1

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

References

https://ubuntu.com/security/notices/USN-6067-1

CVE-2021-20267, CVE-2021-38598, CVE-2021-40085, CVE-2021-40797,

CVE-2022-3277

Severity
critical
Lowest
Low
Medium
High
Critical

May 10, 2023

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu network service OpenStack

Package Information

https://launchpad.net/ubuntu/+source/neutron/2:20.3.0-0ubuntu1.1
https://launchpad.net/ubuntu/+source/neutron/2:16.4.2-0ubuntu6.2
https://launchpad.net/ubuntu/+source/neutron/2:12.1.1-0ubuntu8.1

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