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Merge branch 'bugfix/bt_impersonation_passkey_fix_v4.3' into 'release/v4.3'

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Bluedroid: Check only x component of passkey to avoid passkey impersonation attack. (v4.3)

See merge request espressif/esp-idf!13758
This commit is contained in:
Wang Meng Yang 2021-06-16 08:59:13 +00:00
commit 0c3173874e
1 changed files with 1 additions and 2 deletions
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3
components/bt/host/bluedroid/stack/smp/smp_act.c
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@ -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;