Found a Bug in Windows 7

This may be a slap to Microsoft, a day after announcing his Windows 7 as a risk-free in the Microsoft monthly security bulletin, a bug of Windows 7 (zero day exploits) immediately found. Laurent Gaffie is the latest bug was discovered. Details have been presented in the Full Disclosure mailing list. Microsoft is currently investigating the reported defects, which basically makes the system that exploited Windows 7 will crash.

This crash caused by a flaw in Server Message Block protocol (SMB) which form the backbone of the Windows file sharing. When triggered, defects will cause endless loop that makes the computer can not be used. This weakness is detected in Windows 7 and Windows Server 2008 R2. But so far there has been no reports of attacks on vulnerabilities.

This weakness does not lead to remote access that is not legal that can cause important information theft or other malicious activity performed. One way to overcome this problem is to block TCP ports 139 and 135 to port 445, which will stop the SMB traffic from the network.