[<prev] [next>] [day] [month] [year] [list]
Date: Thu, 29 Aug 2019 14:42:44 +0000
From: Jeremy Stanley <fungi@...goth.org>
To: oss-security@...ts.openwall.com
Subject: [OSSA-2019-004] Ageing time of 0 disables linuxbridge MAC learning
(CVE-2019-15753)
=================================================================
OSSA-2019-004: Ageing time of 0 disables linuxbridge MAC learning
=================================================================
:Date: August 29, 2019
:CVE: CVE-2019-15753
Affects
~~~~~~~
- Os-vif: >=1.15.0<1.15.2, 1.16.0
Description
~~~~~~~~~~~
James Denton with Rackspace reported a vulnerability in os-vif, the
Nova/Neutron network integration library. A hard-coded MAC ageing
time
of 0 disables MAC learning in linuxbridge, forcing obligatory
Ethernet
flooding for non-local destinations which both impedes network
performance and allows users to possibly view the content of packets
for instances belonging to other tenants sharing the same network.
Only deployments using the linuxbridge backend are affected.
Patches
~~~~~~~
- https://review.opendev.org/678098 (Stein)
- https://review.opendev.org/672834 (Train)
Credits
~~~~~~~
- James Denton from Rackspace (CVE-2019-15753)
References
~~~~~~~~~~
- https://launchpad.net/bugs/1837252
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15753
--
Jeremy Stanley, on behalf of the OpenStack VMT
Download attachment "signature.asc" of type "application/pgp-signature" (964 bytes)
Powered by blists - more mailing lists
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.
