CVE-2015-3221

Neutron vulnerability

CVSS

4.0

EPSS

11.3%

EPSS pct

96th

Exploited

No known

OpenStack Neutron before 2014.2.4 (juno) and 2015.1.x before 2015.1.1 (kilo), when using the IPTables firewall driver, allows remote authenticated users to cause a denial of service (L2 agent crash) by adding an address pair that is rejected by the ipset tool.

Affected vendor

Openstack

Affected product

Neutron

CVSS vector

AV:N/AC:L/Au:S/C:N/I:N/A:P

Weakness type (CWE)

CWE-20 — Improper Input Validation

Published

2015-08-26

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring single-factor authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 11.3% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-2015-3221

Confirm whether Openstack Neutron is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2015-3221.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2015-3221

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2015-3221 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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