GHSA-WFQ4-36M3-9G42 Matrix Rust SDK: Sender-binding gaps in to-device and room-key attribution

Impact The matrix-sdk-crypto crate before 0.16.1 is missing a check for the sender's user ID when decrypting an Olm-encrypted to-device message containing the senderdevicekeys property. This could be exploited to spoof the sender of an encrypted to-device message, but only if the attacker collude...