# CVE-2024-0962: obgm libcoap Configuration File coap_oscore.c get_split_entry stack-based overflow

> A stack-based buffer overflow in libcoap allows remote attackers to execute arbitrary code or cause denial of service via crafted configuration files.

- **Severity:** Medium 6.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 27 Jan 2024
- **Updated:** 17 Jun 2025
- **Also known as:** DEBIAN-CVE-2024-0962, GHSA-7qg3-c5c5-86rv, UBUNTU-CVE-2024-0962

## What is CVE-2024-0962?

CVE-2024-0962 is a medium-severity memory corruption vulnerability in obgm libcoap, published on 27 Jan 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability was found in obgm libcoap 4.3.4. It has been rated as critical. Affected by this issue is the function get_split_entry of the file src/coap_oscore.c of the component Configuration File Handler. The manipulation leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. It is recommended to apply a patch to fix this issue. VDB-252206 is the identifier assigned to this vulnerability.

Weakness: CWE-787 (Out-of-bounds Write), CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2024-0962?

It affects 1 product.


Products: Libcoap Libcoap.

## How do I fix CVE-2024-0962?

Apply the vendor's patch.

## Is CVE-2024-0962 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-0962 exists.

## Other vulnerabilities in obgm libcoap

- [CVE-2026-29013](https://insights.sbomify.com/CVE-2026-29013/): libcoap Out-of-Bounds Read in OSCORE CBOR Unwrap Handling (high 8.8)
- [CVE-2025-34468](https://insights.sbomify.com/CVE-2025-34468/): libcoap Stack-Based Buffer Overflow in Address Resolution DoS or Potential RCE (high 8.2)
- [CVE-2025-65493](https://insights.sbomify.com/CVE-2025-65493/): Null dereference in n/a (high 7.5)
- [CVE-2025-65494](https://insights.sbomify.com/CVE-2025-65494/): Null dereference in n/a (high 7.5)
- [CVE-2025-65495](https://insights.sbomify.com/CVE-2025-65495/): Integer overflow in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-0962 and fix it if it is affected.

What it is: CVE-2024-0962 is a medium-severity memory corruption vulnerability in obgm libcoap, published on 27 Jan 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-0962 exists.

Affected product: obgm libcoap. 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-2024-0962/ (Markdown: https://insights.sbomify.com/CVE-2024-0962/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-0962
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-0962
- OSV: https://osv.dev/vulnerability/CVE-2024-0962

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-0962/
Summaries are generated and may contain mistakes; the official description above is the record.