CVE-2019-15753
Critical
Description
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.
SeverityCritical
CVSS9.1
Exploit probability—
ProductOpenstack Os-vif
PublishedAug 28, 2019
First seenAug 28, 2019
How to fix
Update
- openstack os-vif1.15.2 or later
- os-vif1.15.2, 1.17.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openstack os-vif | 1.15.0 ≤ v < 1.15.2, 1.16.0 | 1.15.2 |
| os-vifPyPI | 1.15.0 ≤ v < 1.15.2, 1.16.0 ≤ v < 1.17.0 | 1.15.2, 1.17.0 |
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