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Royal Bank of Scotland fixes data-stealing flaw




Royal Bank of Scotland fixes data-stealing flaw
Royal Bank of Scotland fixes data-stealing flaw



http://www.techworld.com/security/news/index.cfm?newsID=101560 

By Matthew Broersma
Techworld
21 May 2008

The Royal Bank of Scotland (RBS) has fixed a cross-site scripting flaw 
in its Worldpay Internet payments service that could have allowed 
attackers to steal users' credit card details, according to a report.

Adam Grit discovered the cross-site scripting (XSS) flaw in a secure 
payment page of the Worldpay site, RBS' Internet payments service, 
according to a report from IT industry journal The Register.

The flaw allowed third parties to inject content into the page, as Grit 
demonstrated with a pop-up window reading "Is it safe?"

An attacker could have taken advantage of the flaw to inject a false 
login box and steal user credentials, Grit said.

"I have tested this and confirm that unfortunately it does work on the 
live Worldpay website," Grit wrote in a 29 April email to RBS, quoted in 
the report. "Potentially, a fraudulent website could send the user to 
the Worldpay website in order to pay for their purchase, with all of the 
credit card details being then sent back to the hacker's server."

The flaw reportedly remained in place until Monday, a delay of three 
weeks, but has now been patched.

The page affected was protected by an SSL certificate, which industry 
bodies have said can instill a false sense of security.

In newer browsers, SSL-protected sites are downplayed in favour of those 
using Extended Validation SSL, which requires more thorough validation 
of the body requesting the certificate.


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