# CVE-2023-0011: Command Execution through Serial Interface of u-blox TOBY-L2

> Attackers with physical serial access can execute arbitrary OS commands with root privileges on u-blox TOBY-L2 modules via crafted AT commands.

- **Severity:** High 7.6 (`CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Dec 2023
- **Updated:** 24 Apr 2025
- **Also known as:** GHSA-69jv-m7h2-wvmf

## What is CVE-2023-0011?

CVE-2023-0011 is a high-severity command injection vulnerability in u-blox TOBY-L2, published on 20 Dec 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A flaw in the input validation in TOBY-L2 allows a user to execute arbitrary operating system commands using specifically crafted AT commands. This vulnerability requires physical access to the serial interface of the module or the ability to modify the system or software which uses its serial interface to send malicious AT commands.

Exploitation of the vulnerability gives full administrative (root) privileges to the attacker to execute any operating system command on TOBY-L2 which can lead to modification of the behavior of the module itself as well as the components connected with it (depending on its rights on other connected systems). It can further provide the ability to read system level files and hamper the availability of the module as well..

This issue affects TOBY-L2 series: TOBY-L200, TOBY-L201, TOBY-L210, TOBY-L220, TOBY-L280.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2023-0011?

It affects 5 products.


Products: U-Blox Toby-L200 Firmware, U-Blox Toby-L201 Firmware, U-Blox Toby-L210 Firmware, U-Blox Toby-L220 Firmware, U-Blox Toby-L280 Firmware.

## How do I fix CVE-2023-0011?

No fix has been published for CVE-2023-0011 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-0011 being exploited?

There is no known exploitation of CVE-2023-0011 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-0011 and fix it if it is affected.

What it is: CVE-2023-0011 is a high-severity command injection vulnerability in u-blox TOBY-L2, published on 20 Dec 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-0011 in the wild and no public exploit code.

Affected product: u-blox TOBY-L2. 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-2023-0011/ (Markdown: https://insights.sbomify.com/CVE-2023-0011/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-0011
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-0011
- OSV: https://osv.dev/vulnerability/CVE-2023-0011

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-0011/
Summaries are generated and may contain mistakes; the official description above is the record.