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November: Hacker leaks VMware ESX kernel source code to the Web
More from Anonymous, as hackers associated with the collective leaked the VMware ESX Server's kernel source code to the Web. The 2MB file (compressed) was small in size but the independently verified source code was out in the open.
Because kernel source code doesn't change much, "some core functionality still stays the same," the hacker said, indicating that users of the bare bones operating system-independent virtualization server could be at risk for future hacks. VMware said in a public statement that "more related files will be posted in the future," as the virtualization giant scrambled to update its platform to ensure its customers are secure.
December: Nationwide Mutual hacked, 1.1 million Americans affected
And last but not least, insurance giant Nationwide Mutual suffered a hack that affected 1.1 million Americans, according to North Carolina Attorney General. It's thought that the hackers may have been from overseas, and may not have been on U.S. soil.
Customers' names, Social Security numbers, and driver's license details were all pilfered by the hackers, and the possibility of date of birth and marital status, gender and their employers name could not be ruled out. The extent of the hack may not be realized until the early part of 2013. The insurance company prepared a statement and said it was "very sorry," but was not aware of "any misuse of customers' information."