Windows 7, Vista Zero-Day Brings BSoD
An exploit in the SRV2.SYS driver can allow an attacker to remotely crash a PC with Windows 7 or Windows Vista.
Security researcher Laurent Gaffie reports that a zero-day vulnerability affecting both Windows 7 and Vista could allow an attacker to invoke the dreaded Blue Screen of Death. Apparently there is a flaw in a Server Message Block 2 (SMB2) driver that's causing the critical system failure. Gaffie's blog, posted yesterday, says that the driver fails to handle malformed SMB headers for the NEGOTIATE PROTOCOL REQUEST functionality. Windows Server 2008 may also be affected by the exploit.
"An attacker can remotely crash any Vista/Windows 7 machine with SMB enabled," the blog reads. Apparently, Windows XP and 2000 are not affected, as they do not have the SRV2.SYS driver. Gaffie provides a proof of concept sample, and suggests that users close the SMB ports by un-ticking the boxes for file and printer access in the firewall settings until Microsoft releases a patch. Gaffie also contacted Microsoft, however no reply has been provided as of this writing.
The H Security expands on the problem's definition, reporting that the driver crashes when the header of the "Process Id High" field contains an ampersand. The attack can travel through port 445 of the target system, and does not require authentication. The H Security also said that an exploit written in Python is already available.
The site's German associate actually tested the exploit, and succeeded in remotely rebooting a Windows Vista system. The test had no affect on the Windows 7 machine. According to ZDNet, Security researcher (and author of Metasploit) HD Moore suggests in this tweet that a SMB bug may have already been introduced into Vista SP1.
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Kevin Parrish has over a decade of experience as a writer, editor, and product tester. His work focused on computer hardware, networking equipment, smartphones, tablets, gaming consoles, and other internet-connected devices. His work has appeared in Tom's Hardware, Tom's Guide, Maximum PC, Digital Trends, Android Authority, How-To Geek, Lifewire, and others.
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theLaminator I'm still waiting to get a BSOD on my cell phone running Win Mobile, I'd quite possibly laugh my ass off. Though I'd be quite pissed if I lost dataReply -
sot010174 Sorry, but even the pentagon can be hacked, so why Windows would be more secure? I don't see the point in trying to spoil win7 launch party...Reply -
BallistaMan @vladtepes: Actually, Macs have kernal panics as well - basically a black screen saying "Your computer has crashed" and no useful data (well duh it crashed :P). My dad's Macbook Pro gets one of those every month or two at least.Reply -
vladtepes BallistaMan@vladtepes: Actually, Macs have kernal panics as well - basically a black screen saying "Your computer has crashed" and no useful data (well duh it crashed ). My dad's Macbook Pro gets one of those every month or two at least.Reply
Yes I know about that, but the "beachball of death" is much funnier than "kernel panic" -
aspireonelover vladtepesBSODs are to Windows as the spinning beach ball of death is to Mac OSXactuallyReply
BSODs are to Windows as the Kernel Panic is to Mac OSX ;) -
geoffs BallistaMan@vladtepes: Actually, Macs have kernal panics as well - basically a black screen saying "Your computer has crashed" and no useful data (well duh it crashed ). My dad's Macbook Pro gets one of those every month or two at least.Sounds like a hardware problem or an incompatible extension (.kext).Reply
My MBP has only given that message 1-2x in 24 months, and I've only seen the spinning beachball a few times. My MBP is rarely rebooted, I usually just put it to sleep.