# CVE-2014-7821: Denial of service in n/a > Remote authenticated users can crash OpenStack Neutron by submitting a crafted DNS configuration value, causing a denial of service. - **Severity:** Medium 4.0 (`AV:N/AC:L/Au:S/C:N/I:N/A:P`) - **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:** 24 Nov 2014 - **Updated:** 6 Aug 2024 - **Also known as:** DEBIAN-CVE-2014-7821, GHSA-3v86-wqpm-qc9x, RHSA-2014:1938, RHSA-2014:1942, RHSA-2015:0044 ## What is CVE-2014-7821? CVE-2014-7821 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 24 Nov 2014. Any signed-in user can exploit it over the network, with no action from the victim. ### Official description OpenStack Neutron before 2014.1.4 and 2014.2.x before 2014.2.1 allows remote authenticated users to cause a denial of service (crash) via a crafted dns_nameservers value in the DNS configuration. Weakness: CWE-399, CWE-20 (Improper Input Validation) ## Which versions are affected by CVE-2014-7821? It affects 3 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `openstack-neutron` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-bigswitch` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-brocade` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-cisco` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-hyperv` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-linuxbridge` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-mellanox` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-metaplugin` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-metering-agent` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-midonet` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-ml2` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-nec` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-nicira` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-openvswitch` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-plumgrid` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-ryu` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron-vpn-agent` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `python-neutron` | Red Hat:openstack:4::el6 | All versions | 0:2013.2.4-6.el6ost | | `openstack-neutron` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-bigswitch` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-brocade` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-cisco` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-embrane` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-hyperv` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-ibm` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-linuxbridge` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-mellanox` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-metaplugin` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-metering-agent` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-midonet` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-ml2` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-nec` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-nuage` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-ofagent` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-oneconvergence-nvsd` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-openvswitch` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-plumgrid` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-ryu` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-vmware` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | | `openstack-neutron-vpn-agent` | Red Hat:openstack:5::el6 | All versions | 0:2014.1.3-12.el6ost | Products: Fedoraproject Fedora, Openstack Neutron, Redhat Openstack. ## How do I fix CVE-2014-7821? Upgrade to a fixed version. ## Is CVE-2014-7821 being exploited? There is no known exploitation of CVE-2014-7821 in the wild and no public exploit code. ## Other vulnerabilities in Fedoraproject Fedora - [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild) - [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild) - [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild) - [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild) - [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2014-7821 and fix it if it is affected. What it is: CVE-2014-7821 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 24 Nov 2014. Any signed-in user can exploit it over the network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2014-7821 in the wild and no public exploit code. Affected product: Fedoraproject Fedora. No package-level version data is available, so check the vendor advisory linked from the reference page. 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-2014-7821/ (Markdown: https://insights.sbomify.com/CVE-2014-7821/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2014-7821 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2014-7821 - OSV: https://osv.dev/vulnerability/CVE-2014-7821 --- From sbomify Insights: https://insights.sbomify.com/CVE-2014-7821/ Summaries are generated and may contain mistakes; the official description above is the record.