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Category:   Device (Router/Bridge/Hub)  >   Apple AirPort Vendors:   Apple
(Apple Issues Fix for Apple AirPort) wpa_supplicant WPA/WPA2 Protocol Key Reinstallation Attack Lets Remote Users Access and Modify Data on the Target Wireless Network
SecurityTracker Alert ID:  1040002
SecurityTracker URL:  http://securitytracker.com/id/1040002
CVE Reference:   CVE-2017-13077, CVE-2017-13078, CVE-2017-13080   (Links to External Site)
Date:  Dec 13 2017
Impact:   Disclosure of system information, Disclosure of user information, Modification of system information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 7.7
Description:   Multiple vulnerabilities were reported in wpa_supplicant. A remote user on the wireless network can access and modify data on the wireless network. Apple AirPort is affected.

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 the pairwise transient key, a group key, or an integrity key and force a reset of the incremental transmit packet number nonce and the receive replay counter. As a result, the remote user can replay encrypted packets, decrypt packets, and forge packets.

Both client systems and access points are affected.

A remote user on the wireless network can reinstall the pairwise encryption key (PTK-TK) [CVE-2017-13077].

A remote user on the wireless network can reinstall the group key (GTK) [CVE-2017-13078, CVE-2017-13080].

A remote user on the wireless network can reinstall the integrity group key (IGTK) [CVE-2017-13079, CVE-2017-13081].

A remote user on the wireless network can retransmit the Fast BSS Transition (FT) Reassociation Request and reinstall the pairwise encryption key (PTK-TK) [CVE-2017-13082].

A remote user on the wireless network can reinstall the Tunneled Direct-Link Setup (TDLS) PeerKey (TPK) key in the TDLS handshake [CVE-2017-13086].

A remote user on the wireless network can reinstall the group key (GTK) when processing a Wireless Network Management (WNM) Sleep Mode Response frame [CVE-2017-13087].

A remote user on the wireless network can reinstall the integrity group key (IGTK) when processing a Wireless Network Management (WNM) Sleep Mode Response frame [CVE-2017-13088].

This set of vulnerabilities is 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/

Mathy Vanhoef and Frank Piessens from Katholieke Universiteit Leuven reported these vulnerabilities. John Van Boxtel from Cypress reported one vulnerability.

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

Impact:   A remote user on the wireless network can access and modify data on the wireless network.
Solution:   The Apple has issued a fix for CVE-2017-13077, CVE-2017-13078, and CVE-2017-13080 for Apple AirPort (7.7.9).

The Apple advisory is available at:

https://support.apple.com/en-us/HT208354

Vendor URL:  support.apple.com/en-us/HT208354 (Links to External Site)
Cause:   Access control error, State error

Message History:   This archive entry is a follow-up to the message listed below.
Oct 16 2017 wpa_supplicant WPA/WPA2 Protocol Key Reinstallation Attack Lets Remote Users Access and Modify Data on the Target Wireless Network



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