GitHub Advisoryadvisory · PyPI

GHSA-mcpw-cp35-p3h8 OpenStack os-vif Ageing time of 0 disables linuxbridge MAC learning

CRITICAL Published 2022-05-24 Modified 2024-05-02 Official page ↗
Aliases
CVE-2019-15753
Ecosystem
PyPI
Packages
os-vif
Severity
Critical
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weaknesses
CWE-770
Reviewed
2024-05-02

Affected packages

• PyPI os-vif: >= 1.15.0, < 1.15.2 → fixed in 1.15.2 • PyPI os-vif: >= 1.16.0, < 1.17.0 → fixed in 1.17.0

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`.

Related

Alias · CVE (1)

  • 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… vulnerability

Weakness · CWE (1)

  • CWE-770 Allocation of Resources Without Limits or Throttling weakness

References