# CVE-2018-14635: OpensStack Neutron Denial of Service Vulnerability > Non-privileged tenants can bypass IP validation in OpenStack Neutron, potentially causing denial of service by assigning conflicting IP addresses. - **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 10 Sep 2018 - **Updated:** 5 Aug 2024 - **Also known as:** DEBIAN-CVE-2018-14635, GHSA-x634-34m9-96mp, PYSEC-2018-93, RHSA-2018:2710, RHSA-2018:2715, RHSA-2018:3792, UBUNTU-CVE-2018-14635 ## What is CVE-2018-14635? CVE-2018-14635 is a medium-severity missing authorization vulnerability in Redhat Openstack, published on 10 Sep 2018. Any signed-in user can exploit it over the network, with no action from the victim. ### Official description When using the Linux bridge ml2 driver, non-privileged tenants are able to create and attach ports without specifying an IP address, bypassing IP address validation. A potential denial of service could occur if an IP address, conflicting with existing guests or routers, is then assigned from outside of the allowed allocation pool. Versions of openstack-neutron before 13.0.0.0b2, 12.0.3 and 11.0.5 are vulnerable. Weakness: CWE-20 (Improper Input Validation) ## Which versions are affected by CVE-2018-14635? 7 open source packages ship an affected version, including neutron. It affects 2 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `neutron` | PyPI | All versions | 11.0.6, 12.0.4 | | `neutron` | PyPI | All versions | 11.0.6 | | `neutron` | PyPI | All versions | 11.0.6 | | `neutron` | PyPI | From 12.0.0 | 12.0.4 | | `neutron` | PyPI | From 12.0.0 | 12.0.4 | | `neutron` | PyPI | From 13.0.0.0b1 | 13.0.0.0b2 | | `neutron` | PyPI | From 13.0.0.0b1 | 13.0.0.0b2 | | `openstack-neutron` | Red Hat:openstack:10::el7 | All versions | 1:9.4.1-28.el7ost | | `openstack-neutron-common` | Red Hat:openstack:10::el7 | All versions | 1:9.4.1-28.el7ost | | `openstack-neutron-linuxbridge` | Red Hat:openstack:10::el7 | All versions | 1:9.4.1-28.el7ost | | `openstack-neutron-macvtap-agent` | Red Hat:openstack:10::el7 | All versions | 1:9.4.1-28.el7ost | | `openstack-neutron-metering-agent` | Red Hat:openstack:10::el7 | All versions | 1:9.4.1-28.el7ost | | `openstack-neutron-ml2` | Red Hat:openstack:10::el7 | All versions | 1:9.4.1-28.el7ost | | `openstack-neutron-openvswitch` | Red Hat:openstack:10::el7 | All versions | 1:9.4.1-28.el7ost | | `openstack-neutron-rpc-server` | Red Hat:openstack:10::el7 | All versions | 1:9.4.1-28.el7ost | | `openstack-neutron-sriov-nic-agent` | Red Hat:openstack:10::el7 | All versions | 1:9.4.1-28.el7ost | | `python-neutron` | Red Hat:openstack:10::el7 | All versions | 1:9.4.1-28.el7ost | | `python-neutron-tests` | Red Hat:openstack:10::el7 | All versions | 1:9.4.1-28.el7ost | | `openstack-neutron` | Red Hat:openstack:12::el7 | All versions | 1:11.0.4-6.el7ost | | `openstack-neutron-common` | Red Hat:openstack:12::el7 | All versions | 1:11.0.4-6.el7ost | | `openstack-neutron-linuxbridge` | Red Hat:openstack:12::el7 | All versions | 1:11.0.4-6.el7ost | | `openstack-neutron-macvtap-agent` | Red Hat:openstack:12::el7 | All versions | 1:11.0.4-6.el7ost | | `openstack-neutron-metering-agent` | Red Hat:openstack:12::el7 | All versions | 1:11.0.4-6.el7ost | | `openstack-neutron-ml2` | Red Hat:openstack:12::el7 | All versions | 1:11.0.4-6.el7ost | | `openstack-neutron-openvswitch` | Red Hat:openstack:12::el7 | All versions | 1:11.0.4-6.el7ost | | `openstack-neutron-rpc-server` | Red Hat:openstack:12::el7 | All versions | 1:11.0.4-6.el7ost | | `openstack-neutron-sriov-nic-agent` | Red Hat:openstack:12::el7 | All versions | 1:11.0.4-6.el7ost | | `python-neutron` | Red Hat:openstack:12::el7 | All versions | 1:11.0.4-6.el7ost | | `python-neutron-tests` | Red Hat:openstack:12::el7 | All versions | 1:11.0.4-6.el7ost | | `openstack-neutron` | Red Hat:openstack:13::el7 | All versions | 1:12.0.3-5.el7ost | | `openstack-neutron-common` | Red Hat:openstack:13::el7 | All versions | 1:12.0.3-5.el7ost | | `openstack-neutron-linuxbridge` | Red Hat:openstack:13::el7 | All versions | 1:12.0.3-5.el7ost | | `openstack-neutron-macvtap-agent` | Red Hat:openstack:13::el7 | All versions | 1:12.0.3-5.el7ost | | `openstack-neutron-metering-agent` | Red Hat:openstack:13::el7 | All versions | 1:12.0.3-5.el7ost | | `openstack-neutron-ml2` | Red Hat:openstack:13::el7 | All versions | 1:12.0.3-5.el7ost | | `openstack-neutron-openvswitch` | Red Hat:openstack:13::el7 | All versions | 1:12.0.3-5.el7ost | | `openstack-neutron-rpc-server` | Red Hat:openstack:13::el7 | All versions | 1:12.0.3-5.el7ost | | `openstack-neutron-sriov-nic-agent` | Red Hat:openstack:13::el7 | All versions | 1:12.0.3-5.el7ost | | `python-neutron` | Red Hat:openstack:13::el7 | All versions | 1:12.0.3-5.el7ost | Products: Openstack Neutron, Redhat Openstack. ## How do I fix CVE-2018-14635? Upgrade neutron to a fixed version for your release line: 11.0.6, 12.0.4 or 13.0.0.0b2. ## Is CVE-2018-14635 being exploited? There is no known exploitation of CVE-2018-14635 in the wild and no public exploit code. ## Other vulnerabilities in Redhat Openstack - [CVE-2021-38598](https://insights.sbomify.com/CVE-2021-38598/): OpenStack Neutron vulnerable to hardware address impersonation (critical 9.1) - [CVE-2015-8914](https://insights.sbomify.com/CVE-2015-8914/): OpenStack Neutron allows remote attackers to bypass an intended ICMPv6-spoofing protection mechanism (critical 9.1) - [CVE-2016-5362](https://insights.sbomify.com/CVE-2016-5362/): OpenStack Neutron allows remote attackers to bypass an intended DHCP-spoofing protection mechanism (high 8.2) - [CVE-2016-5363](https://insights.sbomify.com/CVE-2016-5363/): OpenStack Neutron Intended MAC-spoofing protection mechanism bypass (high 8.2) - [CVE-2014-3632](https://insights.sbomify.com/CVE-2014-3632/): Privilege escalation in n/a (high 7.6) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2018-14635 and fix it if it is affected. What it is: CVE-2018-14635 is a medium-severity missing authorization vulnerability in Redhat Openstack, published on 10 Sep 2018. Any signed-in user can exploit it over the network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2018-14635 in the wild and no public exploit code. Affected packages and fixed versions: - neutron (PyPI): affected all versions; fixed in 11.0.6, 12.0.4 - neutron (PyPI): affected all versions; fixed in 11.0.6 - neutron (PyPI): affected all versions; fixed in 11.0.6 - neutron (PyPI): affected from 12.0.0; fixed in 12.0.4 - neutron (PyPI): affected from 12.0.0; fixed in 12.0.4 - neutron (PyPI): affected from 13.0.0.0b1; fixed in 13.0.0.0b2 - neutron (PyPI): affected from 13.0.0.0b1; fixed in 13.0.0.0b2 Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2018-14635/ (Markdown: https://insights.sbomify.com/CVE-2018-14635/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2018-14635 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-14635 - OSV: https://osv.dev/vulnerability/CVE-2018-14635 --- From sbomify Insights: https://insights.sbomify.com/CVE-2018-14635/ Summaries are generated and may contain mistakes; the official description above is the record.