Enhanced TKIP Michael Attacks
This exposes critical vulnerabilities in widely used wireless security protocols, posing risks to network integrity and privacy.
The paper presents new attacks against TKIP in IEEE 802.11 networks, extending the Beck-Tews attack to inject longer arbitrary packets and bypass the Michael integrity code, enabling decryption of all client-bound traffic.
This paper presents new attacks against TKIP within IEEE 802.11 based networks. Using the known Beck-Tews attack, we define schemas to con- tinuously generate new keystreams, which allow more and longer arbitrary packets to be injected into the network. We further describe an attack against the Michael message integrity code, that allows an attacker to concatenate a known with an unknown valid TKIP packet such that the unknown MIC at the end is still valid for the new entire packet. Based on this, a schema to decrypt all traffic that flows towards the client is described.