# CVE-2019-13940: Denial of service in SIMATIC ET 200S IM151-8 PN/DP CPU > Attackers can cause a denial of service on the web server of affected Siemens SIMATIC devices by sending specially crafted HTTP requests. - **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** No - **Published:** 11 Feb 2020 - **Updated:** 5 Aug 2024 - **Also known as:** GHSA-2w4m-xhc4-2cxx ## What is CVE-2019-13940? CVE-2019-13940 is a medium-severity denial of service vulnerability in Siemens SIMATIC ET 200S IM151-8 PN/DP CPU, published on 11 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description A vulnerability has been identified in SIMATIC ET 200pro IM154-8 PN/DP CPU (All versions < V3.X.17), SIMATIC ET 200pro IM154-8F PN/DP CPU (All versions < V3.X.17), SIMATIC ET 200pro IM154-8FX PN/DP CPU (All versions < V3.X.17), SIMATIC ET 200S IM151-8 PN/DP CPU (All versions < V3.X.17), SIMATIC ET 200S IM151-8F PN/DP CPU (All versions < V3.X.17), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.1), SIMATIC S7-300 CPU 314C-2 PN/DP (All versions < V3.X.17), SIMATIC S7-300 CPU 315-2 PN/DP (All versions < V3.X.17), SIMATIC S7-300 CPU 315F-2 PN/DP (All versions < V3.X.17), SIMATIC S7-300 CPU 315T-3 PN/DP (All versions < V3.X.17), SIMATIC S7-300 CPU 317-2 PN/DP (All versions < V3.X.17), SIMATIC S7-300 CPU 317F-2 PN/DP (All versions < V3.X.17), SIMATIC S7-300 CPU 317T-3 PN/DP (All versions < V3.X.17), SIMATIC S7-300 CPU 317TF-3 PN/DP (All versions < V3.X.17), SIMATIC S7-300 CPU 319-3 PN/DP (All versions < V3.X.17), SIMATIC S7-300 CPU 319F-3 PN/DP (All versions < V3.X.17), SIMATIC S7-400 PN/DP V6 and below CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP V7 CPU family (incl. SIPLUS variants) (All versions), SIMATIC WinAC RTX 2010 (All versions), SIMATIC WinAC RTX F 2010 (All versions), SIPLUS ET 200S IM151-8 PN/DP CPU (All versions < V3.X.17), SIPLUS ET 200S IM151-8F PN/DP CPU (All versions < V3.X.17), SIPLUS S7-300 CPU 314C-2 PN/DP (All versions < V3.X.17), SIPLUS S7-300 CPU 315-2 PN/DP (All versions < V3.X.17), SIPLUS S7-300 CPU 315F-2 PN/DP (All versions < V3.X.17), SIPLUS S7-300 CPU 317-2 PN/DP (All versions < V3.X.17), SIPLUS S7-300 CPU 317F-2 PN/DP (All versions < V3.X.17). Affected devices contain a vulnerability that could cause a denial of service condition of the web server by sending specially crafted HTTP requests to ports 80/tcp and 443/tcp. Beyond the web service, no other functions or interfaces are affected by the denial of service condition. Weakness: CWE-400 (Uncontrolled Resource Consumption) ## Which versions are affected by CVE-2019-13940? It affects 24 products. Products: Siemens S7-1200 Cpu 1211c Firmware, Siemens S7-1200 Cpu 1212c Firmware, Siemens S7-1200 Cpu 1212fc Firmware, Siemens S7-1200 Cpu 1214c Firmware, Siemens S7-1200 Cpu 1214fc Firmware, Siemens S7-1200 Cpu 1215c Firmware, Siemens S7-1200 Cpu 1215fc Firmware, Siemens S7-1200 Cpu 1217c Firmware, Siemens Simatic S7-300 Cpu 315-2 Pn\/Dp Firmware, Siemens Simatic S7-300 Cpu 315-2dp Firmware, Siemens Simatic S7-300 Cpu 317-2 Dp Firmware, Siemens Simatic S7-300 Cpu 317-2 Pn\/Dp Firmware, Siemens Simatic S7-300 Cpu 319-3 Pn\/Dp Firmware, Siemens Simatic S7-400 Pn\/Dp Cpu Firmware, Siemens Simatic Winac Rtx \(F\) 2010, Siemens Siplus Cpu 1211c Firmware, Siemens Siplus Cpu 1212c Firmware, Siemens Siplus Cpu 1214c Firmware, Siemens Siplus Cpu 1215c Firmware, Siemens Siplus S7-1200 Firmware and 4 more. ## How do I fix CVE-2019-13940? No fix has been published for CVE-2019-13940 yet. Limit exposure of the affected software until one is available. ## Is CVE-2019-13940 being exploited? There is no known exploitation of CVE-2019-13940 in the wild and no public exploit code. ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2019-13940 and fix it if it is affected. What it is: CVE-2019-13940 is a medium-severity denial of service vulnerability in Siemens SIMATIC ET 200S IM151-8 PN/DP CPU, published on 11 Feb 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-2019-13940 in the wild and no public exploit code. Affected product: Siemens SIMATIC ET 200S IM151-8 PN/DP CPU. 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-2019-13940/ (Markdown: https://insights.sbomify.com/CVE-2019-13940/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2019-13940 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-13940 - OSV: https://osv.dev/vulnerability/CVE-2019-13940 --- From sbomify Insights: https://insights.sbomify.com/CVE-2019-13940/ Summaries are generated and may contain mistakes; the official description above is the record.