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Fencer Vulns
medium 4.3

CVE-2023-3637 json

Openstack-neutron: unrestricted creation of security groups (fix for cve-2022-3277)

published 2023-07-25 3 y ago modified 2026-09-10 1 mo ago also GHSA-r3jh-qhgj-gvr8 , PYSEC-2026-1694 , EUVD-2023-2132

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

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.

Patch / fix

  • Red Hat Red Hat OpenStack Platform 16.2 1:15.3.5-2.20230216175503.el8ost
  • python3-neutron openstack 16.2 1:15.3.5-2.20230216175503.el8ost
  • openstack-neutron openstack 16.2 1:15.3.5-2.20230216175503.el8ost
  • openstack-neutron-ml2 openstack 16.2 1:15.3.5-2.20230216175503.el8ost
  • openstack-neutron-common openstack 16.2 1:15.3.5-2.20230216175503.el8ost
  • openstack-neutron-rpc-server openstack 16.2 1:15.3.5-2.20230216175503.el8ost
  • openstack-neutron-linuxbridge openstack 16.2 1:15.3.5-2.20230216175503.el8ost
  • openstack-neutron-openvswitch openstack 16.2 1:15.3.5-2.20230216175503.el8ost
  • openstack-neutron-macvtap-agent openstack 16.2 1:15.3.5-2.20230216175503.el8ost

red hat advisories RHSA-2023:4283

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-3637 updated cvss 4.3

openstack-neutron: unrestricted creation of security groups (fix for CVE-2022-3277)

  • Red Hat OpenStack Platform 13 (Queens) Operational Tools python-neutron, openstack-neutron, openstack-neutron-ml2, openstack-neutron-common, openstack-neutron-rpc-server, openstack-neutron-linuxbridge, +4 more
    affected: no fix planned “Will not fix”
  • Red Hat OpenStack Platform 16.2 python3-neutron 15.3.5-2.20230216175503.el8ost, openstack-neutron 15.3.5-2.20230216175503.el8ost, openstack-neutron-ml2 15.3.5-2.20230216175503.el8ost, openstack-neutron-common 15.3.5-2.20230216175503.el8ost, openstack-neutron-rpc-server 15.3.5-2.20230216175503.el8ost, openstack-neutron-linuxbridge 15.3.5-2.20230216175503.el8ost, +4 more
    fixed: vendor fix RHSA-2023:4283
  • Red Hat OpenStack Platform 16.1 python3-neutron, openstack-neutron, openstack-neutron-ml2, openstack-neutron-common, openstack-neutron-rpc-server, openstack-neutron-linuxbridge, +4 more Red Hat OpenStack Platform 17.0 python3-neutron, openstack-neutron, openstack-neutron-ml2, openstack-neutron-common, openstack-neutron-rpc-server, openstack-neutron-linuxbridge, +6 more Red Hat OpenStack Platform 17.1 python3-neutron, openstack-neutron, openstack-neutron-ml2, openstack-neutron-common, openstack-neutron-rpc-server, openstack-neutron-bgp-dragent, +7 more Red Hat OpenStack Platform 18.0 openstack-neutron
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.31% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
pypi neutron
<=22.0.2
 no fix listed

Affected products

  • Red Hat Red Hat OpenStack Platform 16.2
  • Red Hat Red Hat OpenStack Platform 13 (Queens) Operational Tools
  • Red Hat Red Hat OpenStack Platform 16.1
  • Red Hat Red Hat OpenStack Platform 17.0
  • Red Hat Red Hat OpenStack Platform 17.1
  • Red Hat Red Hat OpenStack Platform 18.0

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.