CVE-2015-3221: Neutron OpenStack Neutron Improper Input Validation Vulnerability

MODERATE
Advisory Identifier: GHSA-wf44-4mgj-rwvx
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CWE-20
Published
Advisory Summary

CVE-2015-3221 is a MODERATE openstack neutron improper input validation vulnerability (CWE-20: Improper Input Validation) affecting Neutron libraries in the PyPI ecosystem. The issue involves openstack neutron improper input validation vulnerability. Remediation is available by upgrading affected packages to version 2014.2.4, 2015.1.1.

CVE-2015-3221 at a Glance

CVE Identifier CVE-2015-3221
GHSA Identifier GHSA-wf44-4mgj-rwvx
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-20: Improper Input Validation
Affected Product Neutron
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix CVE-2015-3221

To remediate this vulnerability, upgrade all affected Neutron dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

neutron fixed: 2014.2.4 
pip install neutron>=2014.2.4
neutron fixed: 2015.1.1 
pip install neutron>=2015.1.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show neutron

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2015-3221, inspect your installed packages using pip:

pip show neutron

Analyze the terminal output to locate any version of Neutron in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2014.2.4), your application is affected.

Note: The pip show neutron command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Neutron, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2015-3221 Affected Neutron Versions

2 component(s)
Fixed Versions:
2014.2.42015.1.1
Product / Package Ecosystem Affected Versions Fixed Version
neutron
pypi/neutron
PyPI
≥ 2000
< 2014.2.4
2014.2.4
neutron
pypi/neutron
PyPI
≥ 2015.1.0
< 2015.1.1
2015.1.1

References

NVD — CVE-2015-3221 NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-3221
access.redhat.com/errata/rhsa-2015:16... WEB
https://access.redhat.com/errata/RHSA-2015:1680
Neutron Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2015-3221
bugs.launchpad.net/neutron/+bug/146105... WEB
https://bugs.launchpad.net/neutron/+bug/1461054
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=1232284
git.openstack.org/cgit/openstack/neut... WEB
https://git.openstack.org/cgit/openstack/neutron/commit/?id=9ff6138c47c95034ba845e9448ddffd147b51f38
Neutron Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/neutron/PYSEC-2026-856.yaml
opendev.org/openstack/neutron PACKAGE
https://opendev.org/openstack/neutron
Neutron Security Information SECURITY
https://web.archive.org/web/20200228084753/http://www.securityfocus.com/bid/75368
lists.openstack.org/pipermail/openstack... WEB
http://lists.openstack.org/pipermail/openstack-announce/2015-June/000377.html
rhn.redhat.com/errata/rhsa-2015-16... WEB
http://rhn.redhat.com/errata/RHSA-2015-1680.html

Frequently Asked Questions

What is CVE-2015-3221?
CVE-2015-3221 is a security vulnerability in Neutron involving OpenStack Neutron Improper Input Validation vulnerability under CWE-20: Improper Input Validation.
Which Neutron versions are affected?
Affected versions include releases prior to 2014.2.4, 2015.1.1 across affected packages: neutron.
What version fixes CVE-2015-3221?
Upgrading to 2014.2.4, 2015.1.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is neutron affected?
Yes, neutron is affected in releases prior to 2014.2.4, 2015.1.1. Upgrade your dependency to 2014.2.4, 2015.1.1 or later.
What CWE is associated with CVE-2015-3221?
CVE-2015-3221 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check PyPI dependencies for CVE-2015-3221?
Run the dependency tree command: 'pip show neutron'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-wf44-4mgj-rwvx",
  "modified" : "2026-08-07T18:57:54Z",
  "published" : "2022-05-14T02:19:50Z",
  "aliases" : [ "CVE-2015-3221" ],
  "summary" : "OpenStack Neutron Improper Input Validation vulnerability",
  "details" : "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.",
  "severity" : [ ],
  "affected" : [ {
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      "ecosystem" : "PyPI",
      "name" : "neutron"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2000"
      }, {
        "fixed" : "2014.2.4"
      } ]
    } ]
  }, {
    "package" : {
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      "name" : "neutron"
    },
    "ranges" : [ {
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        "introduced" : "2015.1.0"
      }, {
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      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
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  }, {
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    "url" : "https://access.redhat.com/errata/RHSA-2015:1680"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2015-3221"
  }, {
    "type" : "WEB",
    "url" : "https://bugs.launchpad.net/neutron/+bug/1461054"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1232284"
  }, {
    "type" : "WEB",
    "url" : "https://git.openstack.org/cgit/openstack/neutron/commit/?id=9ff6138c47c95034ba845e9448ddffd147b51f38"
  }, {
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    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/neutron/PYSEC-2026-856.yaml"
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  }, {
    "type" : "WEB",
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  }, {
    "type" : "WEB",
    "url" : "http://lists.openstack.org/pipermail/openstack-announce/2015-June/000377.html"
  }, {
    "type" : "WEB",
    "url" : "http://rhn.redhat.com/errata/RHSA-2015-1680.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-02-08T18:00:32Z",
    "nvd_published_at" : "2015-08-26T19:59:00Z"
  }
}