The website for the open-source MySQL database was hacked and used to serve malware to visitors Monday.
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By just after 11 a.m., the issue had been cleaned up, said Wayne Huang, Armorize's CEO. He thinks the malicious code was on the site for less than a day.
Huang said that the attackers used the Black Hole exploit kit to attack visitors to the site, but his team had not yet figured out what the malicious software that it installed was designed to do. Typically, criminals install malware to steal victims' passwords, pop up advertisements for fake antivirus software, or to create botnet computers that can be rented out to others.
Oracle, which manages the MySQL.com project, was still investigating the issue and unable to comment for this story Monday.
Highly trafficked open-source websites such as MySQL.com have been hit hard in recent months. In the past weeks the Linux Foundation was forced to take a number of websites offline, including Kernel.org and Linux.com after a compromise. And MySQL.com itself was hit earlier this year.
The hackers who hit MySQL.com in March posted a list of usernames and passwords after their hack, and that data may have been used to break into the site again, according to Maxim Goncharov, a senior threat researcher with Trend Micro.
In Russian underground forums, a hacker named sourcec0de has been shopping root access to the MySQL.com servers recently, Goncharov said. His price? $3,000.
It's not clear whether sourcec0de really did have access to the MySQL.com website, but he did post screenshots that appeared to show that he had root access to the MySQL servers, Goncharov said in a blog posting.