Online Banking Industry Very Vulnerable to Cross-Site Scripting

Online Banking Industry Very Vulnerable to Cross-Site Scripting Frauds

Phishing Attacks reported by members of the Netcraft Toolbar community show that many large banks are neglecting to take sufficient care with the development and testing of their online banking facilities.

Well known banks have created an infestation of application bugs and vulnerabilities across the Internet, allowing fraudsters to insert their data collection forms into bona fide banking sites, creating convincing frauds that are undetectable to most customers. Indeed, a personal finance journalist writing for The Motley Fool was brave enough to publicly admit to having fallen for a fraud running on Suntrust's site and having her current account cleaned out. It's a reasonable premise that if a Motley Fool journalist can fall for a fraud, anyone can.

One fraud recently blocked by the Netcraft Toolbar was at Citizens Bank. Fraudsters composed and mass mailed a phishing mail which exploited a program on, loading Javascript from the attackers' server hosted at Telecom Italia. Customers were presented with a page bearing the URL in the address bar, while the browser window displays a form from the Telecom Italia server asking for user login information.

The script being exploited allows visitors to search for Citizens Bank branch offices in their town. Along with search scripts, branch locator pages are frequently carelessly coded and are targets for fraudsters who are actively analyzing financial web sites for weaknesses.

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Monty Solomon
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