Threat Level: green Handler on Duty: Johannes Ullrich

SANS ISC: HTTP Header Usage Statistics HTTP Header Usage Statistics


Sign Up for Free!   Forgot Password?
Log In or Sign Up for Free!

This is a continuation of work started by Brough Davis as part of his software security project for his Masters in Information Security Engineering. The main goal of this project is to find how many sites use security relevant headers, like for example the X-XSS-Protection or X-Frame-Options headers.

Below you will find a table/histogram showing how many times we found each header (security relevant or not). We access the index page of each site using a "head" request. The list of sites is derived from Alexa's Top 1 Million sites. We try to poll as many sites as possible each day.

As we collect more data, we will plot changes over time.



All Headers Active In The Past Month
Header Popularity
Set-Cookie
X-Cache
Date
Connection
Content-Type
X-Amz-Cf-Pop
Via
X-Amz-Cf-Id
Vary
Server
Cache-Control
Content-Length
ETag
X-Frame-Options
X-Content-Type-Options
Strict-Transport-Security
Age
Last-Modified
Expires
Accept-Ranges
Link
X-XSS-Protection
X-Powered-By
Content-Security-Policy
Referrer-Policy
X-Cache-Lookup
Access-Control-Allow-Origin
Pragma
X-Xss-Protection
X-Download-Options
X-Request-Id
Content-Language
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Amz-Version-Id
X-Edge-Origin-Shield-Skipped
X-UA-Compatible
X-Dns-Prefetch-Control
X-Permitted-Cross-Domain-Policies
Content-Security-Policy-Report-Only
X-Envoy-Upstream-Service-Time
X-Amz-Request-Id
X-Amz-Id-2
X-Varnish
X-Cache-Hits
Access-Control-Allow-Credentials
P3P
X-Runtime
X-DNS-Prefetch-Control
Expect-CT
X-Cacheable
X-Meli-Trace-Bu
X-D2id
X-Meli-Trace-Site
X-Meli-Trace-Platform
X-Request-Device-Id
X-Content-Type
X-Element-Page-Cache
X-Dispatcher
X-Vhost
X-Served-By
Permissions-Policy
X-Navigation-Version
X-Generator
X-AspNet-Version
Accept-Ch
Feature-Policy
Accept-Ch-Lifetime
Status
X-Drupal-Cache
Server-Timing
X-Proxy-Cache
Access-Control-Max-Age
X-Drupal-Dynamic-Cache
X-Server
Access-Control-Expose-Headers
Accept-CH
X-Content-Security-Policy
X-Backend
Report-To
Cache-Tag
X-Amz-Server-Side-Encryption
X-Amzn-Trace-Id
X-Amz-Replication-Status
NEL
X-Varnish-Cache
X-T
X-WebKit-CSP
X-AspNetMvc-Version
X-Cacheable-TTL
X-Amz-Rid
CF-RAY
Xkey
CF-Cache-Status
Content-Encoding
X-ProcessESI
X-RemovedCookies
Xet-Cookie
X-Timer
X-Request-Received
X-Request-Processing-Time
Front
Selected-Fe
X-Timing-Wait
X-Proxy-Build
X-Hl-Ver
Apigw-Requestid
Alt-Svc
X-Page-Speed
X-Backend-Server
X-BYPASS-REASON
X-ProxyCache-Status
X-Cache-Status
X-ProxyCache-Key
CloudFront-Viewer-Country
AMP-Access-Control-Allow-Source-Origin
X-Correlation-Id
Mail-Subject
Expect-Staple
X-AH-Environment
X-Device
We-Hiring
X-SRCache-Store-Status
X-SRCache-Fetch-Status
X-SRCache-Key
SPIisLatency
Request-Id
SPRequestDuration
SPRequestGuid
X-MS-InvokeApp
X-SharePointHealthScore
Countrycode
X-Ruxit-Js-Agent
Grace
X-Oneagent-Js-Injection
X-Clientip
X-Robots-Tag
MicrosoftSharePointTeamServices
X-Mly-Id
Critical-Ch
X-NODE
X-Host
Accept-CH-Lifetime
X-Amzn-RequestId
X-Amz-Apigw-Id
Surrogate-Control
X-Age
X-Mod-Pagespeed
X-Viewer-Country
X-Rq
X-URL
X-Request-ID
X-Cache-FS-Status
X-Vc
Expect-Ct
X-Api-Version
X-Adblock-Key
Cloudfront-Viewer-Country
X-VC
X-Via
Edge-Cache-Tag
X-Iinfo
X-Redis-Cache
X-Cdn
Protected
Request-Context
Timing-Allow-Origin
X-LiteSpeed-Cache
Cf-Edge-Cache
X-Redirect
X-Turbo-Charged-By
X-Azure-Ref
X-Ws-Request-Id
Fastly-Restarts
X-Node
Cf-Apo-Via
X-CDN
X-Provided-By