CVE-2021-38598: OpenStack Neutron vulnerable to hardware address impersonation

CVE-2021-38598 · Severity: low · CVSS 3.1 · Published 2021-08-23

OpenStack Neutron before 16.4.1, 17.x before 17.1.3, and 18.0.0 allows hardware address impersonation when the linuxbridge driver with ebtables-nft is used on a Netfilter-based platform. By sending carefully crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate the hardware addresses of other systems on the network, resulting in denial of service or in some cases possibly interception of traffic intended for other destinations.

Technologies: neutron (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2021-38598 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2021-38598 being exploited in the wild.
How severe is CVE-2021-38598?
Low severity, with a CVSS score of 3.1, published 23 August 2021.
Which products and versions are affected?
neutron (PyPI) ECOSYSTEM:introduced=0,fixed=16.4.1, ECOSYSTEM:introduced=0,fixed=16.4.1,introduced=17.0.0,fixed=17.1.3,introduced=18.0.0,fixed=18.1.0.
Is there a fix for CVE-2021-38598?
Yes. neutron (PyPI): upgrade to 16.4.1, 18.1.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2021-38598?
Check whether you run neutron (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • neutron (PyPI): upgrade to 16.4.1, 18.1.0 or later
    pip install "neutron>=18.1.0"

Affected products

  • neutron (PyPI) ECOSYSTEM:introduced=0,fixed=16.4.1, ECOSYSTEM:introduced=0,fixed=16.4.1,introduced=17.0.0,fixed=17.1.3,introduced=18.0.0,fixed=18.1.0

Identifiers

  • CVE-2021-38598
  • GHSA-hvm4-mc7m-22w4
  • PYSEC-2021-360

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.