# CVE-2023-42769: Sielco Radio Link and Analog FM Transmitters Improper Access Control

> Remote attackers can brute force short session IDs to bypass authentication and manipulate Sielco FM transmitters and radio links.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:** 26 Oct 2023
- **Updated:** 16 Jan 2025
- **Also known as:** GHSA-f78q-jqxf-66cm

## What is CVE-2023-42769?

CVE-2023-42769 is a critical authentication bypass vulnerability in Sielco Analog FM transmitter, published on 26 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The cookie session ID is of insufficient length and can be exploited by 
brute force, which may allow a remote attacker to obtain a valid 
session, bypass authentication, and manipulate the transmitter.

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2023-42769?

It affects 15 products.


Products: Sielco Analog Fm Transmitter Exc1000gt Firmware, Sielco Analog Fm Transmitter Exc1000gx Firmware, Sielco Analog Fm Transmitter Exc100gt Firmware, Sielco Analog Fm Transmitter Exc120gt Firmware, Sielco Analog Fm Transmitter Exc120gx Firmware, Sielco Analog Fm Transmitter Exc1600gx Firmware, Sielco Analog Fm Transmitter Exc2000gx Firmware, Sielco Analog Fm Transmitter Exc3000gx Firmware, Sielco Analog Fm Transmitter Exc300gt Firmware, Sielco Analog Fm Transmitter Exc300gx Firmware, Sielco Analog Fm Transmitter Exc30gt Firmware, Sielco Analog Fm Transmitter Exc5000gt Firmware, Sielco Analog Fm Transmitter Exc5000gx Firmware, Sielco Radio Link Exc19 Firmware, Sielco Radio Link Rtx19 Firmware.

## How do I fix CVE-2023-42769?

No fix has been published for CVE-2023-42769 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-42769 being exploited?

There is no known exploitation of CVE-2023-42769 in the wild and no public exploit code.

## Other vulnerabilities in Sielco Analog FM transmitter

- [CVE-2023-45317](https://insights.sbomify.com/CVE-2023-45317/): Sielco Radio Link and Analog FM Transmitters Cross-Site Request Forgery (high 8.8)
- [CVE-2023-41966](https://insights.sbomify.com/CVE-2023-41966/): Sielco Radio Link and Analog FM Transmitters Privilege Defined With Unsafe Actions (medium 6.5)
- [CVE-2023-45228](https://insights.sbomify.com/CVE-2023-45228/): Sielco Radio Link and Analog FM Transmitters Improper Access Control (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-42769 and fix it if it is affected.

What it is: CVE-2023-42769 is a critical authentication bypass vulnerability in Sielco Analog FM transmitter, published on 26 Oct 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-2023-42769 in the wild and no public exploit code.

Affected product: Sielco Analog FM transmitter. 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-2023-42769/ (Markdown: https://insights.sbomify.com/CVE-2023-42769/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-42769
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-42769
- OSV: https://osv.dev/vulnerability/CVE-2023-42769

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-42769/
Summaries are generated and may contain mistakes; the official description above is the record.