oss-sec mailing list archives
[OSSA-2021-001] Neutron: Anti-spoofing bypass for Open vSwitch networks (CVE-2021-20267)
From: Jeremy Stanley <fungi () yuggoth org>
Date: Mon, 12 Jul 2021 19:16:14 +0000
============================================================= 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
Attachment:
signature.asc
Description:
Current thread:
- [OSSA-2021-001] Neutron: Anti-spoofing bypass for Open vSwitch networks (CVE-2021-20267) Jeremy Stanley (Jul 12)