# CVE-2019-14834: Denial of service in dnsmasq > Remote attackers can cause denial of service via memory consumption in dnsmasq through crafted DHCP responses. - **Severity:** Low 3.7 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 7 Jan 2020 - **Updated:** 5 Aug 2024 - **Also known as:** ALPINE-CVE-2019-14834, CLEANSTART-2026-VX51931, CVE-2020-20145, DEBIAN-CVE-2019-14834, GHSA-rwmq-3523-q2pg, MGASA-2019-0392, RHSA-2020:1715, RHSA-2020:3878, SUSE-SU-2020:0419-1, UBUNTU-CVE-2019-14834, USN-7689-1 ## What is CVE-2019-14834? CVE-2019-14834 is a low-severity denial of service vulnerability in Fedoraproject Fedora, published on 7 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description A vulnerability was found in dnsmasq before version 2.81, where the memory leak allows remote attackers to cause a denial of service (memory consumption) via vectors involving DHCP response creation. Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling) ## Which versions are affected by CVE-2019-14834? It affects 2 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `dnsmasq` | Red Hat:enterprise_linux:7::client | All versions | 0:2.76-16.el7 | | `dnsmasq-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 0:2.76-16.el7 | | `dnsmasq-utils` | Red Hat:enterprise_linux:7::client | All versions | 0:2.76-16.el7 | | `dnsmasq` | Red Hat:enterprise_linux:7::computenode | All versions | 0:2.76-16.el7 | | `dnsmasq-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 0:2.76-16.el7 | | `dnsmasq-utils` | Red Hat:enterprise_linux:7::computenode | All versions | 0:2.76-16.el7 | | `dnsmasq` | Red Hat:enterprise_linux:7::server | All versions | 0:2.76-16.el7 | | `dnsmasq-debuginfo` | Red Hat:enterprise_linux:7::server | All versions | 0:2.76-16.el7 | | `dnsmasq-utils` | Red Hat:enterprise_linux:7::server | All versions | 0:2.76-16.el7 | | `dnsmasq` | Red Hat:enterprise_linux:7::workstation | All versions | 0:2.76-16.el7 | | `dnsmasq-debuginfo` | Red Hat:enterprise_linux:7::workstation | All versions | 0:2.76-16.el7 | | `dnsmasq-utils` | Red Hat:enterprise_linux:7::workstation | All versions | 0:2.76-16.el7 | | `dnsmasq` | Red Hat:enterprise_linux:8::appstream | All versions | 0:2.79-11.el8 | | `dnsmasq-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:2.79-11.el8 | | `dnsmasq-debugsource` | Red Hat:enterprise_linux:8::appstream | All versions | 0:2.79-11.el8 | | `dnsmasq-utils` | Red Hat:enterprise_linux:8::appstream | All versions | 0:2.79-11.el8 | | `dnsmasq-utils-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:2.79-11.el8 | | `dnsmasq` | SUSE:HPE Helion OpenStack 8 | All versions | 2.78-18.12.1 | | `dnsmasq` | SUSE:Linux Enterprise Desktop 12 SP4 | All versions | 2.78-18.12.1 | | `dnsmasq` | SUSE:Linux Enterprise Server 12 SP4 | All versions | 2.78-18.12.1 | | `dnsmasq` | SUSE:Linux Enterprise Server 12 SP5 | All versions | 2.78-18.12.1 | | `dnsmasq` | SUSE:Linux Enterprise Server for SAP Applications 12 SP4 | All versions | 2.78-18.12.1 | | `dnsmasq` | SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 2.78-18.12.1 | | `dnsmasq` | SUSE:OpenStack Cloud 7 | All versions | 2.78-18.12.1 | | `dnsmasq` | SUSE:OpenStack Cloud 8 | All versions | 2.78-18.12.1 | | `dnsmasq` | SUSE:OpenStack Cloud 9 | All versions | 2.78-18.12.1 | | `dnsmasq` | SUSE:OpenStack Cloud Crowbar 8 | All versions | 2.78-18.12.1 | | `dnsmasq` | SUSE:OpenStack Cloud Crowbar 9 | All versions | 2.78-18.12.1 | Products: Fedoraproject Fedora, Thekelleys Dnsmasq. ## How do I fix CVE-2019-14834? Upgrade to a fixed version. ## Is CVE-2019-14834 being exploited? There is no known exploitation of CVE-2019-14834 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-2019-14834 and fix it if it is affected. What it is: CVE-2019-14834 is a low-severity denial of service vulnerability in Fedoraproject Fedora, published on 7 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: There is no known exploitation of CVE-2019-14834 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-2019-14834/ (Markdown: https://insights.sbomify.com/CVE-2019-14834/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2019-14834 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-14834 - OSV: https://osv.dev/vulnerability/CVE-2019-14834 --- From sbomify Insights: https://insights.sbomify.com/CVE-2019-14834/ Summaries are generated and may contain mistakes; the official description above is the record.