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