Bluedroid: Check only x component of passkey to avoid passkey impersonation attack.
@@ -764,8 +764,7 @@ void smp_process_pairing_public_key(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
/* Check if the peer device's and own public key are not same. If they are same then
* return pairing fail. This check is needed to avoid 'Impersonation in Passkey entry
* protocol' vulnerability (CVE-2020-26558).*/
- if ((memcmp(p_cb->loc_publ_key.x, p_cb->peer_publ_key.x, sizeof(BT_OCTET32)) == 0) &&
- (memcmp(p_cb->loc_publ_key.y, p_cb->peer_publ_key.y, sizeof(BT_OCTET32)) == 0)) {
+ if ((memcmp(p_cb->loc_publ_key.x, p_cb->peer_publ_key.x, sizeof(BT_OCTET32)) == 0)) {
p_cb->status = SMP_PAIR_AUTH_FAIL;
p_cb->failure = SMP_PAIR_AUTH_FAIL;
reason = SMP_PAIR_AUTH_FAIL;
