OpenStack os-vif Ageing time of 0 disables linuxbridge MAC learning
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | os-vif | >= 1.15.0, < 1.15.2, >= 1.16.0, < 1.17.0 | 1.15.2, 1.17.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2019-15753
- https://github.com/openstack/os-vif/commit/655c83d706f5de8a8cf23430782e065219297aef
- https://github.com/openstack/os-vif/commit/ec9d5430300c908ea9a1c64151eee7af522a44e7
- https://github.com/openstack/os-vif
- 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://pypi.org/project/os-vif
- https://github.com/advisories/GHSA-mcpw-cp35-p3h8
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H- Weakness (CWE)
CWE-770- Platform
- Python (PyPI)
- Package
os-vif- Disclosed
- 24.05.2022
- Updated
- 11.10.2026 13:17
Sources and licenses
OSV / GitHub Advisory Database - GHSA-mcpw-cp35-p3h8 - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2026-440 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: os-vif
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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