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Category:   OS (Microsoft)  >   Windows TCP/IP Stack Vendors:   Microsoft
Windows IP Fragment Reassembly Algorithm Lets Remote Users Consume Excessive CPU Resources on the Target System
SecurityTracker Alert ID:  1041637
SecurityTracker URL:  http://securitytracker.com/id/1041637
CVE Reference:   CVE-2018-5391   (Links to External Site)
Date:  Sep 11 2018
Impact:   Denial of service via network
Vendor Confirmed:  Yes  
Version(s): 7 SP1, 2008 R2 SP1, 2008 SP2, 8.1, RT 8.1, 2012, 2012 R2, 2016, 10, 10 Version 1607, 10 Version 1703, 10 Version 1709, 10 Version 1803
Description:   A vulnerability was reported in Windows TCP/IP Stack. A remote user can consume excessive CPU resources on the target system.

The system uses an inefficient IP fragment reassembly algorithm. A remote user can send specially crafted fragmented data to consume excessive CPU resources on the target system.

Juha-Matti Tilli (Aalto University, Department of Communications and Networking / Nokia Bell Labs) reported this vulnerability.

Impact:   A remote user can consume excessive CPU resources on the target system.
Solution:   No solution was available at the time of this entry.

The vendor has provided some workaround instructions in their advisory.

The Microsoft advisories are available at:

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV180022
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457132
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457143
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457128
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457129
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457131
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457135
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457138
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457140
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457142
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457144
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457145
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457984
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4458010

Vendor URL:  portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV180022 (Links to External Site)
Cause:   Resource error

Message History:   None.


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