A security researcher has downplayed the significance of publicly released attack code exploiting a critical vulnerability in newer versions of Windows, saying it isn't reliable enough to force Microsoft to issue an emergency patch.
The exploit, which on Monday was folded into the open-source Metasploit penetration testing kit, is at best successful only 50 percent of the time, said Dave Aitel, CTO of security firm Immunity. Given the burden of releasing out-of-schedule patches, Microsoft is unlikely to do so in this case.
"To move something like Microsoft you've got to have something major and this isn't quite it," Aitel, whose company released its own attack code two weeks ago. "It's going to be a lot of work to take the exploit where it is to something that works enough that they will do that."
The vulnerability, which surfaced three weeks ago, resides in file-sharing technology called SMB2, short for server message block version 2, which was first added to Windows Vista and later made its way into newer versions of the operating system. While the Metasploit exploit is sophisticated, it is frequently thwarted by a security measure known as ASLR. Short for address space layout randomization, it picks a different memory location to load system components each time the OS is started
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