Threat Level: green Handler on Duty: Didier Stevens

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