# CVE-2019-0203: Denial of service in Apache Subversion > A remote attacker can cause the Apache Subversion server to crash by sending specific protocol commands, disrupting service availability. - **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 26 Sep 2019 - **Updated:** 4 Aug 2024 - **Also known as:** ALPINE-CVE-2019-0203, ALSA-2019:2512, DEBIAN-CVE-2019-0203, GHSA-2wxr-pw8w-8wx5, RHSA-2019:2512, RLSA-2019:2512, UBUNTU-CVE-2019-0203 ## What is CVE-2019-0203? CVE-2019-0203 is a high-severity denial of service vulnerability in Apache Subversion, published on 26 Sep 2019. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description In Apache Subversion versions up to and including 1.9.10, 1.10.4, 1.12.0, Subversion's svnserve server process may exit when a client sends certain sequences of protocol commands. This can lead to disruption for users of the server. Weakness: CWE-755 (Improper Handling of Exceptional Conditions), CWE-476 (NULL Pointer Dereference) ## Which versions are affected by CVE-2019-0203? It affects 1 product. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `libserf` | AlmaLinux:8 | All versions | 1.3.9-9.module_el8.3.0+2053+ac338b6d | | `libserf` | AlmaLinux:8 | All versions | 1.3.9-9.module_el8.4.0+2266+ac338b6d | | `libserf` | AlmaLinux:8 | All versions | 1.3.9-9.module_el8.6.0+2912+eb1cdf5a | | `utf8proc` | AlmaLinux:8 | All versions | 2.1.1-5.module_el8.3.0+2053+ac338b6d | | `utf8proc` | AlmaLinux:8 | All versions | 2.1.1-5.module_el8.4.0+2266+ac338b6d | | `utf8proc` | AlmaLinux:8 | All versions | 2.1.1-5.module_el8.6.0+2912+eb1cdf5a | | `libserf` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.3.9-9.module+el8.0.0+3900+919b6753 | | `libserf-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.3.9-9.module+el8.0.0+3900+919b6753 | | `libserf-debugsource` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.3.9-9.module+el8.0.0+3900+919b6753 | | `mod_dav_svn` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `mod_dav_svn-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `subversion` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `subversion-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `subversion-debugsource` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `subversion-devel` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `subversion-devel-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `subversion-gnome` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `subversion-gnome-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `subversion-javahl` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `subversion-libs` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `subversion-libs-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `subversion-perl` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `subversion-perl-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `subversion-tools` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `subversion-tools-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:1.10.2-2.module+el8.0.0+3900+919b6753 | | `utf8proc` | Red Hat:enterprise_linux:8::appstream | All versions | 0:2.1.1-5.module+el8.0.0+3900+919b6753 | | `utf8proc-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:2.1.1-5.module+el8.0.0+3900+919b6753 | | `utf8proc-debugsource` | Red Hat:enterprise_linux:8::appstream | All versions | 0:2.1.1-5.module+el8.0.0+3900+919b6753 | | `libserf` | Rocky Linux:8 | All versions | 0:1.3.9-9.module+el8.4.0+407+38733e5a | | `libserf` | Rocky Linux:8 | All versions | 0:1.3.9-9.module+el8.7.0+1065+42200b2e | | `utf8proc` | Rocky Linux:8 | All versions | 0:2.1.1-5.module+el8.4.0+407+38733e5a | Products: Apache Subversion. ## How do I fix CVE-2019-0203? Upgrade to a fixed version. ## Is CVE-2019-0203 being exploited? There is no known exploitation of CVE-2019-0203 in the wild and no public exploit code. ## Other vulnerabilities in Apache Subversion - [CVE-2017-9800](https://insights.sbomify.com/CVE-2017-9800/): A maliciously constructed svn+ssh:// URL would cause Subversion clients before 1.8.19, 1.9.x before 1.9.7, and 1.10.0.x through 1.10.0-alpha (critical 9.8) - [CVE-2013-4246](https://insights.sbomify.com/CVE-2013-4246/): Denial of service in n/a (high 8.8) - [CVE-2015-5259](https://insights.sbomify.com/CVE-2015-5259/): Integer overflow in n/a (high 8.6) - [CVE-2024-45720](https://insights.sbomify.com/CVE-2024-45720/): Apache Subversion: Command line argument injection on Windows platforms (high 8.2) - [CVE-2015-0202](https://insights.sbomify.com/CVE-2015-0202/): Denial of service in n/a (high 7.8) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2019-0203 and fix it if it is affected. What it is: CVE-2019-0203 is a high-severity denial of service vulnerability in Apache Subversion, published on 26 Sep 2019. 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-2019-0203 in the wild and no public exploit code. Affected product: Apache Subversion. 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-2019-0203/ (Markdown: https://insights.sbomify.com/CVE-2019-0203/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2019-0203 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-0203 - OSV: https://osv.dev/vulnerability/CVE-2019-0203 --- From sbomify Insights: https://insights.sbomify.com/CVE-2019-0203/ Summaries are generated and may contain mistakes; the official description above is the record.