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September 6, 2019 10:50 pm

Exploit For Wormable BlueKeep Windows Bug Released Into the Wild

An anonymous reader quotes a report from Ars Technica: For months, security practitioners have worried about the public release of attack code exploiting BlueKeep, the critical vulnerability in older versions of Microsoft Windows that's "wormable," meaning it can spread from computer to computer the way the WannaCry worm did two years ago. On Friday, that dreaded day arrived when the Metasploit framework -- an open source tool used by white hat and black hat hackers alike -- released just such an exploit into the wild. The module, which was published as a work in progress on Github, doesn't yet have the polish and reliability of the EternalBlue exploit that was developed by the NSA and later used in WannaCry. For instance, if the people using the new module specify the wrong version of Windows they want to attack, they'll likely wind up with a blue-screen crash. Getting the exploit to work on server machines also requires a change to default settings in the form of a registry modification that turns on audio sharing. The latest flaw, which is indexed as CVE-2019-0708 but is better known by the name BlueKeep, resides in earlier versions of the Remote Desktop Services, which help provide a graphical interface for connecting to Windows computers over the Internet. It affects Windows 2003 and XP, Vista 7, Server 2008 R2, and Server 2008. When Microsoft patched the vulnerability in May, it warned that computers that failed to install the fix could suffer a similar fate if reliable attack code ever becomes available. The reason: like the flaw that EternalBlue exploited, BlueKeep allowed for self-replicating attacks. Like a falling line of dominoes, a single exploit could spread from vulnerable machine to vulnerable machine with no interaction required of end users. "The release of this exploit is a big deal because it will put a reliable exploit in the hands of both security professionals and malicious actors," Ryan Hanson, principal research consultant at Atredis Partners and a developer who helped work on the release, told Ars. "I'm hoping the exploit will be primarily used by offensive teams to demonstrate the importance of security patches, but we will likely see criminal groups modifying it to deliver ransomware as well."

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