Published: 28/08/2019 Updated: 24/08/2020

CVSS v2 Base Score: 6.4 | Impact Score: 4.9 | Exploitability Score: 10

CVSS v3 Base Score: 9.1 | Impact Score: 5.2 | Exploitability Score: 3.9

VMScore: 570

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:P

In OpenStack os-vif 1.15.x prior to 1.15.2, and 1.16.0, a hard-coded MAC aging time of 0 disables MAC learning in linuxbridge, forcing obligatory Ethernet flooding of 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. This occurs in PyRoute2.add() in internal/command/ip/linux/impl_pyroute2.py.

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openstack os-vif
openstack os-vif 1.16.0

Debian Bug report logs - #939288 python-os-vif: CVE-2019-15753 Package: src:python-os-vif; Maintainer for src:python-os-vif is Debian OpenStack <team+openstack@trackerdebianorg>; Reported by: Salvatore Bonaccorso <carnil@debianorg> Date: Mon, 2 Sep 2019 19:39:17 UTC Severity: grave Tags: security, upstream Found ...

Impact: Low Public Date: 2019-08-28 CWE: CWE-200 Bugzilla: 1747255: CVE-2019-15753 python-os-vif: Hard- ...

oss-sec mailing list archives   By Date By Thread </form>    [OSSA-2019-004] Ageing time of 0 disables linuxbridge MAC learning (CVE-2019-15753)  <!--X-Head-of- ...

CWE-770 https://launchpad.net/bugs/1837252 https://review.opendev.org/672834 https://review.opendev.org/678098 https://security.openstack.org/ossa/OSSA-2019-004.html http://www.openwall.com/lists/oss-security/2019/08/29/2 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=939288 https://nvd.nist.gov https://access.redhat.com/security/cve/cve-2019-15753

CVE-2019-15753

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