# CVE-2023-50763: Denial of service in SIMATIC CP 1542SP-1

> An authenticated remote attacker can cause a denial of service by importing crafted PKCS12 containers into the web server if PKCS12 import is enabled.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Jun 2024
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-2r3h-3xfx-74q9

## What is CVE-2023-50763?

CVE-2023-50763 is a medium-severity denial of service vulnerability in Siemens SIMATIC CP 1542SP-1, published on 11 Jun 2024. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability has been identified in SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0) (All versions < V2.3), SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0) (All versions < V2.3), SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0) (All versions < V2.3), SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) (All versions < V2.4.8), TIM 1531 IRC (6GK7543-1MX00-0XE0) (All versions < V2.4.8). The web server of affected products, if configured to allow the import of PKCS12 containers, could end up in an infinite loop when processing incomplete certificate chains.

This could allow an authenticated remote attacker to create a denial of service condition by importing specially crafted PKCS12 containers.

Weakness: CWE-835 (Loop with Unreachable Exit Condition)

## Which versions are affected by CVE-2023-50763?


## How do I fix CVE-2023-50763?

No fix has been published for CVE-2023-50763 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-50763 being exploited?

There is no known exploitation of CVE-2023-50763 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-50763 and fix it if it is affected.

What it is: CVE-2023-50763 is a medium-severity denial of service vulnerability in Siemens SIMATIC CP 1542SP-1, published on 11 Jun 2024. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-50763 in the wild and no public exploit code.

Affected product: Siemens SIMATIC CP 1542SP-1. 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-2023-50763/ (Markdown: https://insights.sbomify.com/CVE-2023-50763/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-50763
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-50763
- OSV: https://osv.dev/vulnerability/CVE-2023-50763

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-50763/
Summaries are generated and may contain mistakes; the official description above is the record.