Summary

wpa_supplicant is vulnerable to authentication bypass due to its implementation of Protected Extensible Authentication Protocol (PEAP). An attacker could exploit this in order to trick a victim into connecting to a malicious clone of an Enterprise WiFi network and subsequently intercept their traffic. This is achieved by sending an EAP-TLV Success packet instead of starting Phase-2.

Note: For a successful attack, wpa_supplicant must be configured to not verify the network's TLS certificate during Phase 1 authentication, and an eap_peap_decrypt vulnerability can then be abused to skip Phase 2 authentication.

Products Affected

• Brocade Fabric OS versions 9.0 through 9.2.0b1 and 9.2.1 through 9.2.1a
• Brocade SANnav versions before 2.3.0a
• Brocade ASCG versions before 3.0

Products Not Affected

• Brocade Fabric OS versions before 9.0
  [VEX Justification: Component_not_present]

Solution

• Security update provided in Brocade Fabric OS versions 9.2.0c, 9.2.1a1 and 9.2.2
• Security update provided in Brocade SANnav versions 2.3.0 and 2.3.1
• Security update provided in Brocade ASCG version 3.0

Revision History

Disclaimer

THIS DOCUMENT IS PROVIDED ON AN AS-IS BASIS SOLELY FOR INFORMATIONAL PURPOSES AND DOES NOT IMPLY ANY KIND OF GUARANTY OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. YOUR USE OF THE INFORMATION CONTAINED HEREIN IS AT YOUR OWN RISK. ALL INFORMATION PROVIDED HEREIN IS BASED ON BROCADE'S CURRENT KNOWLEDGE AND UNDERSTANDING OF THE VULNERABILITY AND IMPACT TO BROCADE HARDWARE AND SOFTWARE PRODUCTS. BROCADE RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.