# CVE-2023-32171: Unified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability

> Remote authenticated attackers can cause a denial-of-service condition in Unified Automation UaGateway via a crafted XML payload triggering a null pointer dereference.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 May 2024
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-97p9-ff9m-h6m4

## What is CVE-2023-32171?

CVE-2023-32171 is a medium-severity vulnerability in Unified Automation UaGateway, published on 3 May 2024. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Unified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation UaGateway. Authentication is required to exploit this vulnerability.

The specific flaw exists within the ImportCsv method. A crafted XML payload can cause a null pointer dereference. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20495.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2023-32171?

It affects 1 product.


Products: Unified-Automation Uagateway.

## How do I fix CVE-2023-32171?

No fix has been published for CVE-2023-32171 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-32171 being exploited?

There is no known exploitation of CVE-2023-32171 in the wild and no public exploit code.

## Other vulnerabilities in Unified Automation UaGateway

- [CVE-2023-32174](https://insights.sbomify.com/CVE-2023-32174/): Unified Automation UaGateway NodeManagerOpcUa Use-After-Free Remote Code Execution Vulnerability (critical 9.1)
- [CVE-2023-41185](https://insights.sbomify.com/CVE-2023-41185/): Unified Automation UaGateway Certificate Parsing Integer Overflow Denial-of-Service Vulnerability (high 8.6)
- [CVE-2023-32170](https://insights.sbomify.com/CVE-2023-32170/): Unified Automation UaGateway OPC UA Server Improper Input Validation Denial-of-Service Vulnerability (medium 6.5)
- [CVE-2023-32172](https://insights.sbomify.com/CVE-2023-32172/): Unified Automation UaGateway OPC UA Server Use-After-Free Denial-of-Service Vulnerability (medium 6.5)
- [CVE-2023-32173](https://insights.sbomify.com/CVE-2023-32173/): Unified Automation UaGateway AddServer XML Injection Denial-of-Service Vulnerability (medium 5.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-32171 and fix it if it is affected.

What it is: CVE-2023-32171 is a medium-severity vulnerability in Unified Automation UaGateway, published on 3 May 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-32171 in the wild and no public exploit code.

Affected product: Unified Automation UaGateway. 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-2023-32171/ (Markdown: https://insights.sbomify.com/CVE-2023-32171/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-32171
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-32171
- OSV: https://osv.dev/vulnerability/CVE-2023-32171

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-32171/
Summaries are generated and may contain mistakes; the official description above is the record.