# CVE-2018-4832: Denial of service in OpenPCS 7 V7.1 and earlier > Remote attackers can cause denial of service in Siemens SIMATIC products by sending crafted RPC messages, requiring a system reboot to recover. - **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:** No - **Published:** 24 Apr 2018 - **Updated:** 5 Aug 2024 - **Also known as:** GHSA-gx8w-56ch-h8w4 ## What is CVE-2018-4832? CVE-2018-4832 is a high-severity denial of service vulnerability in Siemens OpenPCS 7 V7.1 and earlier, published on 24 Apr 2018. 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 OpenPCS 7 V7.1 and earlier (All versions), OpenPCS 7 V8.0 (All versions), OpenPCS 7 V8.1 (All versions < V8.1 Upd5), OpenPCS 7 V8.2 (All versions), OpenPCS 7 V9.0 (All versions < V9.0 Upd1), SIMATIC BATCH V7.1 and earlier (All versions), SIMATIC BATCH V8.0 (All versions < V8.0 SP1 Upd21), SIMATIC BATCH V8.1 (All versions < V8.1 SP1 Upd16), SIMATIC BATCH V8.2 (All versions < V8.2 Upd10), SIMATIC BATCH V9.0 (All versions < V9.0 SP1), SIMATIC NET PC Software V14 (All versions < V14 SP1 Update 14), SIMATIC NET PC Software V15 (All versions < 15 SP1), SIMATIC PCS 7 V7.1 and earlier (All versions), SIMATIC PCS 7 V8.0 (All versions), SIMATIC PCS 7 V8.1 (All versions), SIMATIC PCS 7 V8.2 (All versions < V8.2 SP1), SIMATIC PCS 7 V9.0 (All versions < V9.0 SP1), SIMATIC Route Control V7.1 and earlier (All versions), SIMATIC Route Control V8.0 (All versions), SIMATIC Route Control V8.1 (All versions), SIMATIC Route Control V8.2 (All versions), SIMATIC Route Control V9.0 (All versions < V9.0 Upd1), SIMATIC WinCC Runtime Professional V13 (All versions < V13 SP2 Upd2), SIMATIC WinCC Runtime Professional V14 (All versions < V14 SP1 Upd5), SIMATIC WinCC V7.2 and earlier (All versions < WinCC 7.2 Upd 15), SIMATIC WinCC V7.3 (All versions < WinCC 7.3 Upd 16), SIMATIC WinCC V7.4 (All versions < V7.4 SP1 Upd 4), SPPA-T3000 Application Server (All versions < Service Pack R8.2 SP2). Specially crafted messages sent to the RPC service of the affected products could cause a Denial-of-Service condition on the remote and local communication functionality of the affected products. A reboot of the system is required to recover the remote and local communication functionality. Please note that an attacker needs to have network access to the Application Server in order to exploit this vulnerability. At the time of advisory publication no public exploitation of this security vulnerability was known. Weakness: CWE-20 (Improper Input Validation) ## Which versions are affected by CVE-2018-4832? It affects 9 products. Products: Siemens Openpcs 7, Siemens Simatic Batch, Siemens Simatic Net Pc, Siemens Simatic Net Pc Software, Siemens Simatic Pcs 7, Siemens Simatic Route Control, Siemens Simatic Wincc, Siemens Simatic Wincc Runtime Professional, Siemens Sppa-T3000 Application Server. ## How do I fix CVE-2018-4832? No fix has been published for CVE-2018-4832 yet. Limit exposure of the affected software until one is available. ## Is CVE-2018-4832 being exploited? There is no known exploitation of CVE-2018-4832 in the wild and no public exploit code. ## Other vulnerabilities in Siemens OpenPCS 7 V7.1 and earlier - [CVE-2019-19282](https://insights.sbomify.com/CVE-2019-19282/): Denial of service in OpenPCS 7 V8.1 (high 7.5) - [CVE-2023-48363](https://insights.sbomify.com/CVE-2023-48363/): Null dereference in OpenPCS 7 V9.1 (high 7.1) - [CVE-2023-48364](https://insights.sbomify.com/CVE-2023-48364/): Null dereference in OpenPCS 7 V9.1 (high 7.1) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2018-4832 and fix it if it is affected. What it is: CVE-2018-4832 is a high-severity denial of service vulnerability in Siemens OpenPCS 7 V7.1 and earlier, published on 24 Apr 2018. 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-2018-4832 in the wild and no public exploit code. Affected product: Siemens OpenPCS 7 V7.1 and earlier. 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-2018-4832/ (Markdown: https://insights.sbomify.com/CVE-2018-4832/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2018-4832 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-4832 - OSV: https://osv.dev/vulnerability/CVE-2018-4832 --- From sbomify Insights: https://insights.sbomify.com/CVE-2018-4832/ Summaries are generated and may contain mistakes; the official description above is the record.