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Category:   OS (Microsoft)  >   Windows Server Message Block Vendors:   Microsoft
Windows Server Message Block SMBv1 Memory Allocation Method Lets Remote Users Cause the Target System to Crash
SecurityTracker Alert ID:  1039022
SecurityTracker URL:  http://securitytracker.com/id/1039022
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Updated:  Aug 3 2017
Original Entry Date:  Jul 31 2017
Impact:   Denial of service via network
Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Windows Server Message Block. A remote user can cause the target system to crash.

A remote user can open multiple SMBv1 connections to the target server and send specially crafted low-bandwidth data to cause the target system to allocate all available memory and crash.

This vulnerability is referred to as 'SMBloris'.

Demonstration exploit code is available at:

https://gist.github.com/marcan/6a2d14b0e3eaa5de1795a763fb58641e

Sean Dillon and Zach Harding of RiskSense reported this vulnerability.

Impact:   A remote user can cause the target system to crash.
Solution:   No solution was available at the time of this entry.

The vendor reportedly does not plan to provide a fix.

Vendor URL:  www.microsoft.com/ (Links to External Site)
Cause:   Resource error

Message History:   None.


 Source Message Contents



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