# CVE-2024-41126: Out-of-bounds read when decoding SNMP messages in Contiki-NG

> An out-of-bounds read in Contiki-NG's SNMP module allows attackers to read memory contents when SNMP is enabled.

- **Severity:** High 8.4 (`CVSS:3.1/AV:A/AC:H/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:** 27 Nov 2024
- **Updated:** 27 Nov 2024
- **Also known as:** GHSA-444j-93j3-5gj4

## What is CVE-2024-41126?

CVE-2024-41126 is a high-severity vulnerability in contiki-ng, published on 27 Nov 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Contiki-NG is an open-source, cross-platform operating system for IoT devices. An out-of-bounds read of 1 byte can be triggered when sending a packet to a device running the Contiki-NG operating system with SNMP enabled. The SNMP module is disabled in the default Contiki-NG configuration. The vulnerability exists in the os/net/app-layer/snmp/snmp-message.c module, where the snmp_message_decode function fails to check the boundary of the message buffer when reading a byte from it immediately after decoding an object identifier (OID). The problem has been patched in Contiki-NG pull request 2937. It will be included in the next release of Contiki-NG. Users are advised to either apply the patch manually or to wait for the next release. A workaround is to disable the SNMP module in the Contiki-NG build configuration.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2024-41126?

It affects 1 product.


Products: Contiki-Ng Contiki-Ng.

## How do I fix CVE-2024-41126?

No fix has been published for CVE-2024-41126 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-41126 being exploited?

There is no known exploitation of CVE-2024-41126 in the wild and no public exploit code.

## Other vulnerabilities in contiki-ng

- [CVE-2018-19417](https://insights.sbomify.com/CVE-2018-19417/): Memory corruption in n/a (critical 10.0)
- [CVE-2023-30546](https://insights.sbomify.com/CVE-2023-30546/): Contiki-NG has off-by-one error in Antelope DBMS (critical 9.8)
- [CVE-2020-24336](https://insights.sbomify.com/CVE-2020-24336/): Memory corruption in n/a (critical 9.8)
- [CVE-2020-14934](https://insights.sbomify.com/CVE-2020-14934/): Memory corruption in n/a (critical 9.8)
- [CVE-2020-14935](https://insights.sbomify.com/CVE-2020-14935/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-41126 and fix it if it is affected.

What it is: CVE-2024-41126 is a high-severity vulnerability in contiki-ng, published on 27 Nov 2024. 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-2024-41126 in the wild and no public exploit code.

Affected product: contiki-ng. 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-2024-41126/ (Markdown: https://insights.sbomify.com/CVE-2024-41126/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-41126
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-41126
- OSV: https://osv.dev/vulnerability/CVE-2024-41126

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-41126/
Summaries are generated and may contain mistakes; the official description above is the record.