Source Pravda.Ru

Malicious Javascript toolkit rages in Internet

A common JavaScript-related security problem reminded of itself.

It’s cross-site scripting, or XSS, a violation of the same origin policy. XSS vulnerabilities occur when an attacker is able to cause a trusted Web site, such as an online banking website, to include a malicious script in the webpage presented to a victim. In that example, the script can then access the banking application with the privileges of the victim, potentially disclosing secret information or transferring money without the victim's authorization.

The vivid example is about 10,000 trusted websites infected last month by javascript toolkit, aimed at sending victims' personal information to attackers via the web.

Finjan, a privately owned web security company, reported that the new toolkit is a very smart program and can easily avoid detection, adapt to new conditions and make an adjustment when patch released.

The user embeds malicious script into the websites himself. The script does not appear on the site after end-user’s first appearance. That’s why it’s almost impossible to track it down.

Though discovered the script is still active and harmful.

Photo: www.microsoft.com

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