COSSACK LABS | firewall

Mar 5, 2019

How We Built an SQL Firewall — AcraCensor

Intro There are two main ways to mitigate SQL injections: inside the app (using prepared statements, stored procedures, escaping) and outside the app (using Web Application Firewalls or SQL firewalls). WAFs analyse web and HTML traffic using rule sets based on regexs and are good for covering the known vulnerabilities. SQL firewalls sit closer to the database, analyse SQL statements for potentially malicious content, which makes them more flexible in SQL injections prevention.

products database security intrusion detection SQL firewall postgresql

Feb 13, 2019

Preventing SQL Injections When WAF’s Not Enough

Intro What is the biggest threat to a tool that prevents unauthorised database access? Requests from the application side that trigger data leakage. Namely, SQL injections and other application attacks that allow attackers to craft custom SQL queries. How can we prevent that? The standard industry response is obvious — input sanitization, web application firewalls (WAFs), and prepared statements are typically used for addressing these concerns. We’re shipping a product which aims to intervene into application logic as little as possible but as it turns out, input sanitization is rarely done well, WAFs are not always efficient, and prepared statements are a question of app developer’s choice.

applied security database security Acra firewall SQL backend security series