Overview
- 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.
- Source
- cve@mitre.org
- NVD status
- Analyzed
Risk scores
CVSS 3.0
- Type
- Primary
- Base score
- 9.1
- Impact score
- 5.2
- Exploitability score
- 3.9
- Vector string
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- Severity
- CRITICAL
CVSS 2.0
- Type
- Primary
- Base score
- 6.4
- Impact score
- 4.9
- Exploitability score
- 10
- Vector string
- AV:N/AC:L/Au:N/C:P/I:N/A:P
Weaknesses
- nvd@nist.gov
- CWE-770
Social media
- Hype score
- Not currently trending
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:openstack:os-vif:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DD398F71-724F-4AB0-ACD2-A1D7CD5D1D14",
"versionEndExcluding": "1.15.2",
"versionStartIncluding": "1.15.0"
},
{
"criteria": "cpe:2.3:a:openstack:os-vif:1.16.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FD6DDB42-392D-4384-BDB3-44747D0CD355"
}
],
"operator": "OR"
}
]
}
]