“Visiting the affected PlayStation site runs a script that pretends to do an online security scan of your computer, and presents a bogus warning message that your PC is infected with a variety of different pieces of malware,” the SophosLabs blog explains. “Users frightened by the scareware ‘warnings’ might rush to spend money on useless software.”
SQL injection attacks involve passing malicious code to SQL databases as user input. An improperly configured or vulnerable SQL application can be made to execute that input. All that’s needed is to add HTML into a Web page that calls a script on a malicious site.
Since January, SQL injection attacks have surged across the Web. Researchers at the SANS Internet Storm Center and elsewhere have said that the reason for this is the existence of an automated tool that searches for sites running vulnerable software and attacks them. Attackers can configure the tool to insert any code they want. (link)