# CVE-2023-0779: net: shell: Improper input validation

> An attacker can cause a device crash or potentially execute code by providing an invalid pointer to the Zephyr RTOS shell.

- **Severity:** Medium 6.7 (`CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 May 2023
- **Updated:** 13 Feb 2025
- **Also known as:** GHSA-9xj8-6989-r549

## What is CVE-2023-0779?

CVE-2023-0779 is a medium-severity vulnerability in Zephyrproject Zephyr, published on 30 May 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

At the most basic level, an invalid pointer can be input that crashes the device, but with more knowledge of the device’s memory layout, further exploitation is possible.

Weakness: CWE-476 (NULL Pointer Dereference), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2023-0779?

It affects 1 product.


Products: Zephyrproject Zephyr.

## How do I fix CVE-2023-0779?

No fix has been published for CVE-2023-0779 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-0779 being exploited?

There is no known exploitation of CVE-2023-0779 in the wild and no public exploit code.

## Other vulnerabilities in Zephyrproject Zephyr

- [CVE-2026-5067](https://insights.sbomify.com/CVE-2026-5067/): Out-of-bounds read/write in HTTP WebSocket upgrade via non-null-terminated Sec-WebSocket-Key (critical 9.8)
- [CVE-2022-3806](https://insights.sbomify.com/CVE-2022-3806/): Bluetooth HCI Error Handling Double Free (critical 9.8)
- [CVE-2017-14199](https://insights.sbomify.com/CVE-2017-14199/): Memory corruption in getaddrinfo (critical 9.8)
- [CVE-2018-1000800](https://insights.sbomify.com/CVE-2018-1000800/): Null dereference in n/a (critical 9.8)
- [CVE-2021-3329](https://insights.sbomify.com/CVE-2021-3329/): DOS: Incorrect handling of the initial HCI ACL_MTU handshake packet leads to crash of bluetooth host layer (critical 9.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-0779 and fix it if it is affected.

What it is: CVE-2023-0779 is a medium-severity vulnerability in Zephyrproject Zephyr, published on 30 May 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-2023-0779 in the wild and no public exploit code.

Affected product: Zephyrproject Zephyr. 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-2023-0779/ (Markdown: https://insights.sbomify.com/CVE-2023-0779/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-0779
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-0779
- OSV: https://osv.dev/vulnerability/CVE-2023-0779

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-0779/
Summaries are generated and may contain mistakes; the official description above is the record.