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ASP sites more vulnerable to SQL injections

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April 24, 2008

The dynamic capabilities and flexibility of Web sites operated with the help of back-end MySQL and SQL Server databases made thousands of them prime targets for SQL Injections, or of unsanitized code that could allow a potential attacker to create havoc for the site to thousands of unsuspecting users.

So far, three popular websites have been found to host malicious SQL Injection exploits that unsuspecting people may visit while searching the Internet for something. Links to such malicious content turned up in thousands of links to otherwise innocent sites, thanks to a seemingly unstoppable outbreak of "SQL Injection" attacks.

Potential hackers want to drop a Gaming Trojan onto a victim's computer. With ten million players alone on World of Warcraft, and thousands more on other similar online games, such Trojans could read and intercept confidential login credentials and steal billing information or other sensitive personal information.

Security vendor F-Secure discovered in a cursory search on Google the presence of 510,000 pages affected by the attacks on a variety of websites. F-Secure advised security pros to block access to the rogue domains hosting the malware: nmidahena.com, aspder.com and nihaorr1.com.

F-Secure vendor found the so-called SQL Injection attack at issue now seeks out all of the text fields in the SQL database, and then adds a link to a malicious JavaScript located on the database.

F-Secure also warned that ASP-based websites are even more susceptible to an attack, since the hackers look for .asp and .aspx pages located in the site. ASP and .aspx websites are always hosted on Windows servers, and not Linux it said.

"Unless that data is sanitized before it gets saved you simply can't control what the site will show to the Web visitors. This is what SQL Injection is all about: exploiting severe weaknesses in such controls," F-Secure said.

Any website offering the ability to upload specific content, either from blogs to forums and beyond, could be at risk from similar attacks.

F-Secure suggested webmasters and developers check their server log files for a section of the SQL injection code they listed in this latest post about these attacks.

If the code is present, the SQL database needs to be cleaned up thouroughly, and the application needs to be fixed to sanitize incoming content, and to prevent such similar potential attacks from happening in the future.

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Source: Business 5.0.

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