# CVE-2022-37013: Denial of service in OPC UA C++ Demo Server

> Remote attackers can cause a denial-of-service condition in Unified Automation OPC UA C++ Demo Server by sending a crafted certificate that triggers an infinite loop.

- **Severity:** High 7.5 (`CVSS:3.0/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:** 29 Mar 2023
- **Updated:** 18 Feb 2025
- **Also known as:** GHSA-gh4v-v2hh-g9m6

## What is CVE-2022-37013?

CVE-2022-37013 is a high-severity denial of service vulnerability in Unified Automation OPC UA C++ Demo Server, published on 29 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation OPC UA C++ Demo Server 1.7.6-537 [with vendor rollup]. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of certificates. A crafted certificate can force the server into an infinite loop. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-17203.

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

## Which versions are affected by CVE-2022-37013?

It affects 1 product.


Products: Unified-Automation Opc Ua C\+\+ Demo Server.

## How do I fix CVE-2022-37013?

No fix has been published for CVE-2022-37013 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-37013 being exploited?

There is no known exploitation of CVE-2022-37013 in the wild and no public exploit code.

## Other vulnerabilities in Unified Automation OPC UA C++ Demo Server

- [CVE-2022-37012](https://insights.sbomify.com/CVE-2022-37012/): Denial of service in OPC UA C++ Demo Server (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-37013 and fix it if it is affected.

What it is: CVE-2022-37013 is a high-severity denial of service vulnerability in Unified Automation OPC UA C++ Demo Server, published on 29 Mar 2023. 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-2022-37013 in the wild and no public exploit code.

Affected product: Unified Automation OPC UA C++ Demo Server. 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-2022-37013/ (Markdown: https://insights.sbomify.com/CVE-2022-37013/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-37013
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-37013
- OSV: https://osv.dev/vulnerability/CVE-2022-37013

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-37013/
Summaries are generated and may contain mistakes; the official description above is the record.