ModSecurity: Core Rule Set

sumber: http://modsecurity.org/crs/

OWASP ModSecurity Core Rule Set (CRS) adalah sekumpulan generic attack detection rules untuk digunakan dengan ModSecurity atau compatible web application firewall. CRS bertujuan untuk protect web application dari berbagai serangan, termasuk OWASP Top Ten, dengan minimum false alert.

OWASP ModSecurity Core Rule Set (CRS) memungkinkan proteksi terhadap banyak kategori serangan yang umum, termasuk,

• SQL Injection (SQLi)
• Cross Site Scripting (XSS)
• Local File Inclusion (LFI)
• Remote File Inclusion (RFI)
• Remote Code Execution (RCE)
• PHP Code Injection
• HTTP Protocol Violations
• HTTPoxy
• Shellshock
• Session Fixation
• Scanner Detection
• Metadata/Error Leakages
• Project Honey Pot Blacklist
• GeoIP Country Blocking

OWASP ModSecurity Core Rule Set adalah free software, yang di distribusikan menggunakan Apache Software License version 2.

New Features in CRS 3

CRS 3 includes many coverage improvements, plus the following new features:

Over 90% reduction of false alerts in a default install
A user-defined Paranoia Level to enable additional strict checks
Application-specific exclusions for WordPress Core and Drupal
Sampling mode runs the CRS on a user-defined percentage of traffic
SQLi/XSS parsing using libinjection embedded in ModSecurity

For a full list of changes in this release, see the CHANGES document.

Installation

Instalasi OWASP ModSecurity Core Rule Set CRS 3 membutuhkan Apache/IIS/Nginx web server dengan ModSecurity 2.8.0 atau yang lebih tinggi.

GitHub repository adalah cara yang lebih disukai untuk download dan update CRS.

HTTPS	git clone https://github.com/SpiderLabs/owasp-modsecurity-crs.git
SSH	git clone git@github.com:SpiderLabs/owasp-modsecurity-crs.git

Setelah download, copy crs-setup.conf.example ke crs-setup.conf. Atau edit file tersebut untuk mengkonfigurasi setting CRS. Kemudian masukan file tersebut ke konfigurasi web server, melalui,

Include /.../crs-setup.conf
Include /.../rules/*.conf

For detailed installation instructions, see the INSTALL document. Also review the CHANGES and KNOWN_BUGS documents.

You can update the rule set using the included script util/upgrade.py.

Handling False Positives and Advanced Features

Advanced features are explained in the crs-setup.conf and the rule files themselves. The crs-setup.conf file is generally a very good entry point to explore the features of the CRS.

We are trying hard to reduce the number of false positives (false alerts) in the default installation. But sooner or later, you may encounter false positives nevertheless.

Christian Folini's tutorials on installing ModSecurity, configuring the CRS and handling false positives provide in-depth information on these topics.

Community

We strive to make the OWASP ModSecurity CRS accessible to a wide audience of beginner and experienced users. We are interested in hearing any bug reports, false positive alert reports, evasions, usability issues, and suggestions for new detections.

Create an issue on GitHub to report a false positive or false negative (evasion). Please include your installed version and the relevant portions of your ModSecurity audit log.

Sign up for the mailing list to ask general usage questions and participate in discussions on the CRS.

Join the #modsecurity channel on Freenode IRC to chat about the CRS.

Core Team

Chaim Sanders (csanders-git) - Project Lead
Walter Hop (lifeforms) - Core Developer
Christian Folini (Twitter: @ChrFolini, GitHub: dune73) - Core Developer

Referensi

• http://modsecurity.org/crs/