Threat Level: green Handler on Duty: Xavier Mertens

SANS ISC: HTTP Header Usage Statistics HTTP Header Usage Statistics


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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
X-Cache
Set-Cookie
Date
Connection
Content-Type
X-Cache-Lookup
Vary
Server
Cache-Control
Via
X-Amz-Cf-Pop
X-Amz-Cf-Id
X-Edge-Origin-Shield-Skipped
Content-Length
X-Frame-Options
X-Content-Type-Options
Strict-Transport-Security
ETag
Expires
X-Powered-By
Link
Last-Modified
Accept-Ranges
Age
Accept-CH
Content-Security-Policy
X-XSS-Protection
Pragma
Referrer-Policy
X-Xss-Protection
Access-Control-Allow-Origin
Expect-CT
CF-RAY
CF-Cache-Status
Content-Language
X-Download-Options
X-Request-Id
Report-To
NEL
Alt-Svc
EagleId
Access-Control-Allow-Methods
X-UA-Compatible
Access-Control-Allow-Headers
X-DNS-Prefetch-Control
X-Cache-Hits
X-Varnish
Content-Security-Policy-Report-Only
X-Amz-Version-Id
X-Permitted-Cross-Domain-Policies
X-Envoy-Upstream-Service-Time
X-Served-By
Access-Control-Allow-Credentials
X-Adblock-Key
Accept-CH-Lifetime
P3P
X-Runtime
X-Generator
Permissions-Policy
X-Amz-Request-Id
X-Amz-Id-2
X-Cacheable
X-Vhost
X-Dispatcher
X-Drupal-Cache
X-Drupal-Dynamic-Cache
X-Meli-Trace-Platform
X-Meli-Trace-Bu
X-Meli-Trace-Site
X-Request-Device-Id
X-D2id
X-Element-Page-Cache
X-Content-Type
X-AspNet-Version
X-Navigation-Version
X-Timer
Feature-Policy
X-Dns-Prefetch-Control
Server-Timing
Access-Control-Max-Age
Status
X-Backend
X-Cache-Status
X-Iinfo
X-CDN
X-Via
X-Content-Security-Policy
Access-Control-Expose-Headers
X-Server
X-Proxy-Cache
X-Ws-Request-Id
Content-Encoding
X-Turbo-Charged-By
X-Varnish-Cache
X-Amz-Server-Side-Encryption
X-Amzn-Trace-Id
Cache-Tag
Timing-Allow-Origin
Xkey
X-AspNetMvc-Version
X-RemovedCookies
X-WebKit-CSP
X-ProcessESI
X-Aspnet-Version
Request-Id
X-MS-InvokeApp
SPRequestDuration
SPRequestGuid
X-SharePointHealthScore
X-Amz-Rid
SPIisLatency
X-AH-Environment
Cf-Edge-Cache
Apigw-Requestid
X-Timing-Wait
X-Proxy-Build
X-Node
Selected-Fe
AMP-Access-Control-Allow-Source-Origin
X-Page-Speed
X-LiteSpeed-Cache
X-Redirect
Front
MicrosoftSharePointTeamServices
X-Host
X-Cacheable-TTL
X-Amz-Replication-Status
CloudFront-Viewer-Country
X-Robots-Tag
X-Mly-Id
Xet-Cookie
X-OneAgent-JS-Injection
Grace
Fastly-Restarts
X-Provided-By
X-Ruxit-JS-Agent
X-Cache-Group
X-Device
X-SRCache-Store-Status
Cf-Apo-Via
X-SRCache-Fetch-Status
X-Mod-Pagespeed
X-SRCache-Key
Protected
X-Backend-Server
X-Pantheon-Styx-Hostname
X-Rq
X-Correlation-Id
X-Styx-Req-Id
X-Readtime
Expect-Staple
Request-Context
X-Server-Powered-By
X-Age
X-Hl-Ver
X-User
X-Viewer-Country
X-Server-Id
X-Cache-Time
Countrycode
Mail-Subject
X-CST
We-Hiring
X-Clientip
X-Azure-Ref
Content-Location
X-Cache-TTL
X-Amz-Apigw-Id
X-Amzn-RequestId
X-Ua-Compatible
X-HW
Allow
X-Status
Liferay-Portal
X-Debug-Info
X-Powered-By-Plesk
X-Vcl-Version
X-Trace
Odigeo-Trace-Id
X-Country-Code
X-Language
Cf-Railgun
X-Oneagent-Js-Injection
Resin-Trace
X-Ruxit-Js-Agent
P3p
X-B3-TraceId
X-Server-ID
X-ID
X-Generated-By
X-Yottaa-Metrics
Request-ID
X-Yottaa-Optimizations
X-Envoy-Decorator-Operation
AKAMAI-GRN
X-Akam-SW-Version
X-Template
X-Pinterest-Rid
X-T
X-UA-Device
Mrf-Cache-Status
Pinterest-Version
Pinterest-Generated-By
MRF-Tech
X-B3-TraceId-Primal