CVE-2023-3637: Neutron Denial of Service Vulnerability

MODERATE
Advisory Identifier: GHSA-r3jh-qhgj-gvr8
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CVSS 6.5
CWE-400
Published
Advisory Summary

CVE-2023-3637 is a MODERATE (CVSS 6.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Neutron libraries in the PyPI ecosystem. The issue involves denial of service in neutron. Remediation is available in the latest vendor maintenance releases.

CVE-2023-3637 at a Glance

CVE Identifier CVE-2023-3637
GHSA Identifier GHSA-r3jh-qhgj-gvr8
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Neutron
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2023-3637

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: Latest secure release 
pip install neutron>=Latest secure release
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-2023-3637, 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 the patched release), 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-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. 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

An uncontrolled resource consumption flaw was found in openstack-neutron. This flaw allows a remote authenticated user to query a list of security groups for an invalid project. This issue creates resources that are unconstrained by the user's quota. If a malicious user were to submit a significant number of requests, this could lead to a denial of service.

CVE-2023-3637 Affected Neutron Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
neutron
pypi/neutron
PyPI
≤ 22.0.2

References

NVD — CVE-2023-3637 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-3637
access.redhat.com/errata/rhsa-2023:42... WEB
https://access.redhat.com/errata/RHSA-2023:4283
Neutron Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2023-3637
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2222270

Frequently Asked Questions

What is CVE-2023-3637?
CVE-2023-3637 is a security vulnerability in Neutron involving Denial of service in neutron under CWE-400: Uncontrolled Resource Consumption.
Which Neutron versions are affected?
Affected versions include releases prior to current release patches across affected packages: neutron.
What version fixes CVE-2023-3637?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is neutron affected?
Yes, neutron is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2023-3637?
CVE-2023-3637 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2023-3637?
CVE-2023-3637 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check PyPI dependencies for CVE-2023-3637?
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-r3jh-qhgj-gvr8",
  "modified" : "2023-07-31T18:59:51Z",
  "published" : "2023-07-25T15:30:25Z",
  "aliases" : [ "CVE-2023-3637" ],
  "summary" : "Denial of service in neutron",
  "details" : "An uncontrolled resource consumption flaw was found in openstack-neutron. This flaw allows a remote authenticated user to query a list of security groups for an invalid project. This issue creates resources that are unconstrained by the user's quota. If a malicious user were to submit a significant number of requests, this could lead to a denial of service.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "neutron"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "22.0.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-3637"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2023:4283"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2023-3637"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2222270"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-25T19:24:57Z",
    "nvd_published_at" : "2023-07-25T13:15:10Z"
  }
}