OpenStack Neutron Intended MAC-spoofing protection mechanism bypass

Description

The IPTables firewall in OpenStack Neutron up to 7.0.4 and 8.x before 8.1.0 allows remote attackers to bypass an intended MAC-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via (1) a crafted DHCP discovery message or (2) crafted non-IP traffic.

Basic information

Type
reviewed
Severity
high
Advisory on GitHub
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Repository advisory
Source code
Browse source ↗
Published (advisory)
2022-05-17 03:40:37 UTC
Updated
2024-05-14 21:08:46 UTC
GitHub reviewed
2024-05-14 21:08:44 UTC
NVD published
2016-06-17

EPSS Score

Score Percentile
4.75% 88.95%

CVSS Scores

Base score Version Severity Vector
8.2 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.

Identifiers

Affected packages (2)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
pip neutron <= 7.0.4 7.1.0
pip neutron >= 8.0.0, < 8.1.0 8.1.0

References

cvelogic Threat Intelligence