Serious Flash vulns menace tens of thousands websites

debsuvra · 23-12-2007, 07:14 PM

Researchers from Google have documented serious vulnerabilities in Adobe Flash content which leave tens of thousands of websites susceptible to attacks that steal the personal details of visitors.
The security bugs reside in Flash applets, the ubiquitous building blocks for movies and graphics that animate sites across the web. Also known as SWF files, they are vulnerable to attacks in which malicious strings are injected into the legitimate code through a technique known as cross-site scripting, or XSS. Currently there are no patches for the vulnerabilities, which are found in sites operated by financial institutions, government agencies and other organizations.

The vulnerabilities are laid out in the book Hacking Exposed Web 2.0: Web 2.0 Security Secrets and Solutions. It is due to hit store shelves soon, but is already in the hands of many security professionals. The book's authors, who work for penetration testing firm iSEC Partners as well as for Google, say a web search reveals more than 500,000 vulnerable applets on major corporate, government and media sites.
"Lots of people are vulnerable, and right now there are no protections available other than to remove those SWFs and wait for the authoring tools and/or Flash player to be updated," says Alex Stamos, one of the book's authors. "In the mean time, people will have to think: 'What kind of flash am I using on my site,' and manually test for vulnerabilities."

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