Vulnerability Details CVE-2019-15753
In OpenStack os-vif 1.15.x before 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.01
EPSS Ranking 75.6%
CVSS Severity
CVSS v3 Score 9.1
CVSS v2 Score 6.4
References
- http://www.openwall.com/lists/oss-security/2019/08/29/2
- 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://launchpad.net/bugs/1837252
- https://review.opendev.org/672834
- https://review.opendev.org/678098
- https://security.openstack.org/ossa/OSSA-2019-004.html