Simon Willison’s Weblog

4 items tagged “sqlinjection”

What are the best practices to avoid XSS and SQL Injections attacks (platform agnostic)?

Input validation is, in my opinion, a red herring. Sure—if you ask the user for an integer or date you should make sure they entered one before attempting to save it anywhere or use it for processing, but injection attacks often involve text fields (e.g. names, or comments posted on Quora) and validating those on input is a recipe for banning “Tim O’Reilly” from ever creating a proper profile on your site!

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For those who haven’t heard the story the details were pulled from a Christian dating site which had a query parameter injection vulnerability. The vulnerability allowed you to navigate to a person’s profile by entering the user id and skipping authentication. Once you got there the change password form had the passwords in plain text. Someone wrote a scraper and now the entire database is on Mediafire and contains thousands of email/password combinations.

rossriley on Hacker News # 23rd August 2009, 10:10 am

How one site dealt with SQL injection attack (via) Horrifying story of developer incompetence from Autoweb: “The contractor had no idea how to find and fix the Web page vulnerability that allowed the SQL injection attack code to execute successfully.” # 2nd May 2008, 9:01 pm

Mass Attack FAQ. Thousands of IIS Web servers have been infected with an automated mass XSS attack, not through a specific IIS vulnerability but using a universal XSS SQL query that targets SQL Server and modifies every text field to add the attack JavaScript. If an app has even a single SQL injection hole (and many do) it is likely to be compromised. # 26th April 2008, 9:12 am