Marvell Driver EAPoL-Key Length Overflow

Credit: Laurent Butti
Risk: Medium
Local: No
Remote: Yes

CVSS Base Score: 6.3/10
Impact Subscore: 6.9/10
Exploitability Subscore: 6.8/10
Exploit range: Remote
Attack complexity: Medium
Authentication: Single time
Confidentiality impact: None
Integrity impact: None
Availability impact: Complete

Title: ------ * Marvell Driver EAPoL-Key Length Overflow Summary: -------- * 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). Assigned CVE: ------------- * CVE-2008-1144 Details: -------- * 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. Attack Impact: -------------- * Denial-of-service (reboot or hang-up) and possibly remote arbitrary code execution Attack Vector: -------------- * Unauthenticated wireless device for WPA/WPA2-PSK and EAP-based authenticated wireless device for WPA/WPA2-EAP Timeline: --------- * 2008-02-19 - Vulnerability reported Netgear * 2008-03-06 - PoC sent to Netgear * 2008-09-04 - Public disclosure Affected Products: ------------------ * Netgear WN802T (firmware 1.3.16) with MARVELL 88W8361P-BEM1 chipset Vulnerable Devices: ------------------- * As it is a wireless driver specific issue, the wireless vendor should use the latest chipset wireless driver for their access point firmwares. This security vulnerability was reported to Netgear, updated firmwares should be available on their web site. Any other wireless device relying on this vulnerable wireless driver is likely to be vulnerable. Credits: -------- * This vulnerability was discovered by Laurent Butti and Julien Tinnes from France Telecom / Orange


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