Host Header Attacks

CWE-644: Improper Neutralization of HTTP Headers

Checklist

• Web cache poisoning via ambiguous requests

• Password reset poisoning

  • Add two HOST: in Request.

  • Try localhost

  • Try this Headers

  • If you come across /api.json in any AEM instance during bug hunting, try for web cache poisoning via followingHost: , X-Forwarded-Server , X-Forwarded-Host: and or simply try https://localhost/api.json HTTP/1.1

  • Also try Host: redacted.com.evil.com

  • Try Host: evil.com/redacted.com https://hackerone.com/reports/317476

  • Try this too Host: example.com?.mavenlink.com

  • Try Host: javascript:alert(1); Xss payload might result in debugging mode. https://blog.bentkowski.info/2015/04/xss-via-host-header-cse.html

  • Host Header to Sqli https://blog.usejournal.com/bugbounty-database-hacked-of-indias-popular-sports-company-bypassing-host-header-to-sql-7b9af997c610

  • Bypass front server restrictions and access to forbidden files and directories through

  • Add line wrapping

  • Supply an absolute URL

• Web cache poisoning

• Exploiting classic server-side vulnerabilities

• Bypassing authentication

• Virtual host brute-forcing

• Routing-based SSRF

• Connection state attacks

References

• PortSwigger