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Category:   OS (Microsoft)  >   Windows DLL (Any) Vendors:   Microsoft
Microsoft Windows WPA/WPA2 Protocol Key Reinstallation Attack Lets Remote Users Modify Data on the Target Wireless Network
SecurityTracker Alert ID:  1039572
SecurityTracker URL:  http://securitytracker.com/id/1039572
CVE Reference:   CVE-2017-13080   (Links to External Site)
Date:  Oct 16 2017
Impact:   Modification of system information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 7 SP1, 2008 R2 SP1, 2008 SP2, 8.1, RT 8.1, 2012, 2012 R2, 2016, 10, 10 Version 1511, 10 Version 1607, 10 Version 1703
Description:   A vulnerability was reported in Microsoft Windows. A remote user on the wireless network can modify data on the wireless network.

A remote user within range of the wireless network can record and replay retransmissions of part of the 802.11i 4-way handshake of the WPA and WPA2 protocols to force a reinstallation of certain keys.

A remote user on the wireless network that can conduct a man-in-the-middle attack can reinstall the group key (GTK) to replay data on the target wireless network.

This vulnerability is one of a set of vulnerabilities referred to as KRACK (Key Reinstallation AttaCK).

The original advisory is available at:

https://papers.mathyvanhoef.com/ccs2017.pdf

Additional information is available at:

https://www.krackattacks.com/

[Editor's note: The vulnerability resides in the WPA and WPA2 protocol specification and is not due to incorrect vendor implementation of the standards.]

Mathy Vanhoef and Frank Piessens from Katholieke Universiteit Leuven reported this vulnerability.

Impact:   A remote user on the wireless network can modify data on the wireless network.
Solution:   The vendor has issued a fix (as part of the October 2017 security update that was released on October 10, 2017).

The vendor advisory is available at:

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-13080

Vendor URL:  portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-13080 (Links to External Site)
Cause:   Access control error, State error

Message History:   None.


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