# CVE-2023-23571: Denial of service in UR32L

> A specially crafted network request can cause an access violation in Milesight UR32L devices, leading to denial of service.

- **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:** 6 Jul 2023
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-hcp4-644r-q8xr

## What is CVE-2023-23571?

CVE-2023-23571 is a high-severity denial of service vulnerability in Milesight Ur32l Firmware, published on 6 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An access violation vulnerability exists in the eventcore functionality of Milesight UR32L v32.3.0.5. A specially crafted network request can lead to denial of service. An attacker can send a network request to trigger this vulnerability.

Weakness: CWE-126 (Buffer Over-read)

## Which versions are affected by CVE-2023-23571?

It affects 1 product.


Products: Milesight Ur32l Firmware.

## How do I fix CVE-2023-23571?

No fix has been published for CVE-2023-23571 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-23571 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-23571 exists.

## Other vulnerabilities in Milesight Ur32l Firmware

- [CVE-2023-23902](https://insights.sbomify.com/CVE-2023-23902/): Memory corruption in UR32L (critical 9.8)
- [CVE-2023-47166](https://insights.sbomify.com/CVE-2023-47166/): Missing authorization in UR32L (high 8.8)
- [CVE-2023-22299](https://insights.sbomify.com/CVE-2023-22299/): Command injection in UR32L (high 8.8)
- [CVE-2023-22653](https://insights.sbomify.com/CVE-2023-22653/): Command injection in UR32L (high 8.8)
- [CVE-2023-24018](https://insights.sbomify.com/CVE-2023-24018/): Memory corruption in UR32L (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-23571 and fix it if it is affected.

What it is: CVE-2023-23571 is a high-severity denial of service vulnerability in Milesight Ur32l Firmware, published on 6 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-23571 exists.

Affected product: Milesight Ur32l Firmware. 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-2023-23571/ (Markdown: https://insights.sbomify.com/CVE-2023-23571/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-23571
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-23571
- OSV: https://osv.dev/vulnerability/CVE-2023-23571

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-23571/
Summaries are generated and may contain mistakes; the official description above is the record.