Coraza is an open source, enterprise-grade, high performance Web Application Firewall (WAF) ready to protect your beloved applications. It written in Go, supports ModSecurity SecLang rulesets and is 100% compatible with the OWASP Core Rule Set.

• Website: https://coraza.io
• Forum: Github Discussions
• OWASP Slack Community (#coraza): https://owasp.org/slack/invite
• Rule testing: Coraza Playground
• Planning: Github Projects

Key Features:

• ⇲ Drop-in - Coraza is a drop-in alternative to replace the soon to be abandoned Trustwave ModSecurity Engine and supports industry standard SecLang rule sets.

• 🔥 Security - Coraza runs the OWASP Core Rule Set (CRS) to protect your web applications from a wide range of attacks, including the OWASP Top Ten, with a minimum of false alerts. CRS protects from many common attack categories including: SQL Injection (SQLi), Cross Site Scripting (XSS), PHP & Java Code Injection, HTTPoxy, Shellshock, Scripting/Scanner/Bot Detection & Metadata & Error Leakages.

• 🔌 Extensible - Coraza is a library at its core, with many integrations to deploy on-premise Web Application Firewall instances. Audit Loggers, persistence engines, operators, actions, create your own functionalities to extend Coraza as much as you want.

• 🚀 Performance - From huge websites to small blogs, Coraza can handle the load with minimal performance impact. Check our Benchmarks

• ﹡ Simplicity - Anyone is able to understand and modify the Coraza source code. It is easy to extend Coraza with new functionality.

• 💬 Community - Coraza is a community project, contributions are accepted and all ideas will be considered. Find contributor guidance in the CONTRIBUTION document.

The Coraza Project maintains implementations and plugins for the following servers:

• Caddy Reverse Proxy and Webserver Plugin - stable, needs a maintainer
• Proxy WASM extension for proxies with proxy-wasm support (e.g. Envoy) - stable, still under development
• HAProxy SPOE Plugin - preview
• Traefik Proxy Plugin - preview, needs maintainer
• Gin Web Framework Middleware - preview, needs maintainer
• Apache HTTP Server - experimental
• Nginx - experimental
• Coraza C Library - experimental

• Coraza GeoIP (preview)

• Golang compiler v1.18+
• Linux distribution (Debian or Centos recommended) or Mac. Windows not supported yet.

Coraza can be used as a library for your Go program to implement a security middleware or integrate it with existing application & webservers.

package main

import (
 "fmt"
 "github.com/corazawaf/coraza/v3"
)

func main() {
 // First we initialize our waf and our seclang parser
 waf, err := coraza.NewWAF(coraza.NewWAFConfig().
  WithDirectives(`SecRule REMOTE_ADDR "@rx .*" "id:1,phase:1,deny,status:403"`))
 // Now we parse our rules
 if err != nil {
  fmt.Println(err)
 }

 // Then we create a transaction and assign some variables
    tx := waf.NewTransaction()
 defer func() {
  tx.ProcessLogging()
  tx.Close()
 }()
 tx.ProcessConnection("127.0.0.1", 8080, "127.0.0.1", 12345)

 // Finally we process the request headers phase, which may return an interruption
 if it := tx.ProcessRequestHeaders(); it != nil {
  fmt.Printf("Transaction was interrupted with status %d\n", it.Status)
 }
}

Examples/http-server provides an example to practice with Coraza.

Go build tags can tweak certain functionality at compile-time. These are for advanced use cases only and do not have compatibility guarantees across minor versions - use with care.

• coraza.disabled_operators.* - excludes the specified operator from compilation. Particularly useful if overriding the operator with plugins.RegisterOperator to reduce binary size / startup overhead.
• coraza.rule.multiphase_valuation - enables evaluation of rule variables in the phases that they are ready, not only the phase the rule is defined for.

Http/e2e/ provides an utility to run e2e tests. It can be used standalone against your own waf deployment:

go run github.com/corazawaf/coraza/http/e2e@main --proxy-hostport localhost:8080 --httpbin-hostport localhost:8081

or as a library by importing:

"github.com/corazawaf/coraza/v3/http/e2e/pkg"

As a reference for library usage, see testing/e2e/e2e_test.go. Expected directives that have to be loaded and available flags can be found in http/e2e/main.go.

• Go FTW: Rule testing engine
• Coraza Playground: Sandbox rule testing web interface
• OWASP Core Ruleset: Awesome rule set, compatible with Coraza

Coraza only requires Go for development. You can run mage.go to issue development commands.

See the list of commands

go run mage.go -l

For example, to format your code before submission, run

go run mage.go format

Contributions are welcome! Please refer to CONTRIBUTING.md for guidance.

To report a security issue, please follow this link and add a description of the issue, the steps you took to create the issue, affected versions, and, if known, mitigations for the issue.

Our vulnerability management team will respond within 3 working days of your report. If the issue is confirmed as a vulnerability, we will open a Security Advisory. This project follows a 90 day disclosure timeline.

• Modsecurity team for creating ModSecurity
• OWASP Coreruleset team for the CRS and their help

• Babiel (supporter)

• @corazaio

For donations, see Donations site

First and foremost, huge thanks to Juan Pablo Tosso for starting this project, and building an amazing community around Coraza!

Today we have lots of amazing contributors, we could not have done this without you!

Made with contrib.rocks.