CVEvulnerability
CVE-2019-15753
9.1 CRITICAL
Official page ↗
- Status
- Modified
- Published
- 2019-08-28
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.0 ([email protected])
- 9.1 CRITICAL — CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- CVSS 2.0 ([email protected])
- 6.4 MEDIUM — AV:N/AC:L/Au:N/C:P/I:N/A:P
- Weaknesses
- CWE-770
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.
Affected configurations
• openstack os-vif (>= 1.15.0 < 1.15.2)
• openstack os-vif 1.16.0
Related
Weakness · CWE (1)
- CWE-770 Allocation of Resources Without Limits or Throttling weakness
References
- http://www.openwall.com/lists/oss-security/2019/08/29/2 Mailing List, Patch, Third Party Advisory
- https://launchpad.net/bugs/1837252 Issue Tracking, Third Party Advisory
- https://review.opendev.org/672834 Patch
- https://review.opendev.org/678098 Patch
- https://security.openstack.org/ossa/OSSA-2019-004.html Patch, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2019/08/29/2 Mailing List, Patch, Third Party Advisory
- https://launchpad.net/bugs/1837252 Issue Tracking, Third Party Advisory
- https://review.opendev.org/672834 Patch
- https://review.opendev.org/678098 Patch
- https://security.openstack.org/ossa/OSSA-2019-004.html Patch, Vendor Advisory