# CVE-2023-6574: Byzoro Smart S20 HTTP POST Request updateos.php unrestricted upload

> Remote attackers can upload arbitrary files via the updateos.php endpoint, potentially leading to code execution on the device.

- **Severity:** Medium 6.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L`)
- **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:** 7 Dec 2023
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-wjp2-7h9f-2jxg

## What is CVE-2023-6574?

CVE-2023-6574 is a medium-severity vulnerability in Byzoro Smart S20, published on 7 Dec 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was found in Byzoro Smart S20 up to 20231120 and classified as critical. Affected by this issue is some unknown functionality of the file /sysmanage/updateos.php of the component HTTP POST Request Handler. The manipulation of the argument 1_file_upload leads to unrestricted upload. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-247154 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2023-6574?

It affects 1 product.


Products: Byzoro Smart S20 Firmware.

## How do I fix CVE-2023-6574?

No fix has been published for CVE-2023-6574 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-6574 being exploited?

There is no known exploitation of CVE-2023-6574 in the wild and no public exploit code.

## Other vulnerabilities in Byzoro Smart S20

- [CVE-2024-1254](https://insights.sbomify.com/CVE-2024-1254/): Byzoro Smart S20 Management Platform sysmanageajax.php sql injection (medium 4.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-6574 and fix it if it is affected.

What it is: CVE-2023-6574 is a medium-severity vulnerability in Byzoro Smart S20, published on 7 Dec 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-6574 in the wild and no public exploit code.

Affected product: Byzoro Smart S20. 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-2023-6574/ (Markdown: https://insights.sbomify.com/CVE-2023-6574/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-6574
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-6574
- OSV: https://osv.dev/vulnerability/CVE-2023-6574

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-6574/
Summaries are generated and may contain mistakes; the official description above is the record.