oss-security - [OSSA-2021-001] Neutron: Anti-spoofing bypass for Open vSwitch networks (CVE-2021-20267)

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20210712191614.z2bgvg2tvuiwa3wi@yuggoth.org>
Date: Mon, 12 Jul 2021 19:16:14 +0000
From: Jeremy Stanley <fungi@...goth.org>
To: oss-security@...ts.openwall.com
Subject: [OSSA-2021-001] Neutron: Anti-spoofing bypass for Open vSwitch
 networks (CVE-2021-20267)

=============================================================
OSSA-2021-001: Anti-spoofing bypass for Open vSwitch networks
=============================================================

:Date: July 12, 2021
:CVE: CVE-2021-20267


Affects
~~~~~~~
- Neutron: <16.3.3, >=17.0.0 <17.1.3, =18.0.0


Description
~~~~~~~~~~~
David Sinquin with Gandi.net reported a vulnerability in Neutron's
default Open vSwitch firewall rules. By sending carefully crafted
packets, anyone in control of a server instance connected to the
virtual switch can impersonate the IPv6 addresses of other systems
on the network, resulting in denial of service or in some cases
possibly interception of traffic intended for other destinations.
Only deployments using the Open vSwitch driver are affected.


Patches
~~~~~~~
- https://review.opendev.org/777873 (Queens)
- https://review.opendev.org/791470 (Queens)
- https://review.opendev.org/777786 (Rocky)
- https://review.opendev.org/791469 (Rocky)
- https://review.opendev.org/777872 (Stein)
- https://review.opendev.org/791500 (Stein)
- https://review.opendev.org/777785 (Train)
- https://review.opendev.org/791468 (Train)
- https://review.opendev.org/777784 (Ussuri)
- https://review.opendev.org/791467 (Ussuri)
- https://review.opendev.org/777783 (Victoria)
- https://review.opendev.org/791465 (Victoria)
- https://review.opendev.org/776599 (Wallaby)
- https://review.opendev.org/791464 (Wallaby)
- https://review.opendev.org/783743 (Xena)


Credits
~~~~~~~
- David Sinquin from Gandi.net (CVE-2021-20267)


References
~~~~~~~~~~
- https://launchpad.net/bugs/1902917
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20267


Notes
~~~~~
- The stable/train, stable/stein, stable/rocky, and stable/queens
  branches are under extended maintenance and will receive no new
  point releases, but patches for them are provided as a courtesy.


-- 
Jeremy Stanley

Download attachment "signature.asc" of type "application/pgp-signature" (964 bytes)

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.