[NEWS] Marvell Driver EAPoL-Key Length Overflow
- From: SecuriTeam <support@xxxxxxxxxxxxxx>
- Date: 7 Sep 2008 17:40:37 +0200
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Marvell Driver EAPoL-Key Length Overflow
The wireless drivers in some Wi-Fi access points (such as the
MARVELL-based Netgear WN802T) do not correctly parse malformed EAPoL-Key
packets. This packet is used for unicast/multicast key derivation (which
are called 4-way handshake and group key handshake) of any secure wireless
connection (WPA-PSK, WPA2-PSK, WPA-EAP, WPA2-EAP).
* Netgear WN802T (firmware 1.3.16) with MARVELL 88W8361P-BEM1 chipset
The bug can be triggered by a malicious EAPoL-Key packet sent to the
wireless access point (this packet has an advertised length too long
triggering the overflow). This can be achieved only after a successful
802.11 authentication (in "Open" mode according to the configuration of
the wireless access point) and a successful 802.11 association with
appropriate security parameters (e.g. WPA w/ TKIP unicast, TKIP multicast)
which depends on the configuration of the wireless access point.
Denial-of-service (reboot or hang-up) and possibly remote arbitrary code
Unauthenticated wireless device for WPA/WPA2-PSK and EAP-based
authenticated wireless device for WPA/WPA2-EAP
The information has been provided by
<mailto:laurent.butti@xxxxxxxxxxxxxxxxxx> Laurent Butti and Julien Tinnes.
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