STA detected Michael MIC failure way too many times

[Jason Carr]

I keep getting Michael MIC failures causing disconnects.  The machine having
key problems is a Windows XP SP2 machine and I am not using wpa_supplicant.
Am I missing some setting or something on either the hostapd or the Windows
XP client?  I don't have the SP2 firewall enabled.

Jul 29 00:49:58 [hostapd] wlan0: WPA rekeying GTK
Jul 29 00:49:58 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: sending 1/2 msg of Group Key Handshake
Jul 29 00:49:58 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: received EAPOL-Key frame (2/2 Group)
Jul 29 00:49:58 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: group key handshake completed (WPA)
Jul 29 00:50:46 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: received EAPOL-Key frame (Request)
Jul 29 00:50:46 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: received EAPOL-Key Error Request (STA detected Michael MIC failure)
Jul 29 00:50:46 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: sending 1/4 msg of 4-Way Handshake
Jul 29 00:50:46 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: received EAPOL-Key frame (Request)
Jul 29 00:50:46 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: received EAPOL-Key request with invalid MIC
Jul 29 00:50:46 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: received EAPOL-Key frame (2/4 Pairwise)
Jul 29 00:50:46 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: sending 3/4 msg of 4-Way Handshake
Jul 29 00:50:46 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: received EAPOL-Key frame (4/4 Pairwise)
Jul 29 00:50:47 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: pairwise key handshake completed (WPA)
Jul 29 00:50:47 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: sending 1/2 msg of Group Key Handshake
Jul 29 00:50:47 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: received EAPOL-Key frame (2/2 Group)
Jul 29 00:50:47 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: group key handshake completed (WPA)
Jul 29 00:50:47 [hostapd] wlan0: STA 00:12:f0:34:60:7f WPA: event 2 notification
Jul 29 00:50:47 [hostapd] wlan0: STA 00:12:f0:34:60:7f IEEE 802.11: disassociated
Jul 29 00:50:47 [hostapd] wlan0: STA 00:12:f0:34:60:7f RADIUS: updated TX/RX stats: Acct-Input-Octets=9832 Acct-Input-Gigawords=0 Acct-Output-Octets=35420 Acct-Output-Gigawords=0



-- 
Jason Carr (jason at flacid.org)