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https://github.com/Divested-Mobile/DivestOS-Build.git
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134 lines
4.7 KiB
Diff
134 lines
4.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Ugo Yu <ugoyu@google.com>
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Date: Thu, 29 Nov 2018 17:55:40 +0800
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Subject: [PATCH] Fix OOB caused by invalid SMP packet length
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Bug: 111850706
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Bug: 111213909
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Bug: 111214770
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Bug: 111214470
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Test: PoC, Manully
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Change-Id: I889d2de97b1aab706c850a950f668aba558f240f
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---
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stack/smp/smp_act.cc | 34 ++++++++++++++++++++++++++++++++++
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stack/smp/smp_int.h | 1 +
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stack/smp/smp_utils.cc | 27 +++++++++++++++++++++++++++
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3 files changed, 62 insertions(+)
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diff --git a/stack/smp/smp_act.cc b/stack/smp/smp_act.cc
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index 7b6ae6f2c..8667cc8fd 100644
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--- a/stack/smp/smp_act.cc
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+++ b/stack/smp/smp_act.cc
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@@ -503,6 +503,14 @@ void smp_proc_pair_cmd(tSMP_CB* p_cb, tSMP_INT_DATA* p_data) {
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p_cb->flags |= SMP_PAIR_FLAG_ENC_AFTER_PAIR;
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+ if (smp_command_has_invalid_length(p_cb)) {
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+ tSMP_INT_DATA smp_int_data;
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+ smp_int_data.status = SMP_INVALID_PARAMETERS;
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+ android_errorWriteLog(0x534e4554, "111850706");
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+ smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &smp_int_data);
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+ return;
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+ }
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+
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STREAM_TO_UINT8(p_cb->peer_io_caps, p);
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STREAM_TO_UINT8(p_cb->peer_oob_flag, p);
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STREAM_TO_UINT8(p_cb->peer_auth_req, p);
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@@ -776,6 +784,14 @@ void smp_br_process_pairing_command(tSMP_CB* p_cb, tSMP_INT_DATA* p_data) {
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p_cb->flags |= SMP_PAIR_FLAG_ENC_AFTER_PAIR;
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+ if (smp_command_has_invalid_length(p_cb)) {
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+ tSMP_INT_DATA smp_int_data;
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+ smp_int_data.status = SMP_INVALID_PARAMETERS;
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+ android_errorWriteLog(0x534e4554, "111213909");
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+ smp_br_state_machine_event(p_cb, SMP_BR_AUTH_CMPL_EVT, &smp_int_data);
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+ return;
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+ }
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+
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STREAM_TO_UINT8(p_cb->peer_io_caps, p);
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STREAM_TO_UINT8(p_cb->peer_oob_flag, p);
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STREAM_TO_UINT8(p_cb->peer_auth_req, p);
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@@ -981,6 +997,15 @@ void smp_proc_id_addr(tSMP_CB* p_cb, tSMP_INT_DATA* p_data) {
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tBTM_LE_KEY_VALUE pid_key;
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SMP_TRACE_DEBUG("%s", __func__);
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+
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+ if (smp_command_has_invalid_parameters(p_cb)) {
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+ tSMP_INT_DATA smp_int_data;
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+ smp_int_data.status = SMP_INVALID_PARAMETERS;
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+ android_errorWriteLog(0x534e4554, "111214770");
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+ smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &smp_int_data);
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+ return;
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+ }
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+
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smp_update_key_mask(p_cb, SMP_SEC_KEY_TYPE_ID, true);
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STREAM_TO_UINT8(pid_key.pid_key.addr_type, p);
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@@ -1007,6 +1032,15 @@ void smp_proc_srk_info(tSMP_CB* p_cb, tSMP_INT_DATA* p_data) {
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tBTM_LE_KEY_VALUE le_key;
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SMP_TRACE_DEBUG("%s", __func__);
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+
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+ if (smp_command_has_invalid_parameters(p_cb)) {
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+ tSMP_INT_DATA smp_int_data;
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+ smp_int_data.status = SMP_INVALID_PARAMETERS;
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+ android_errorWriteLog(0x534e4554, "111214470");
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+ smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &smp_int_data);
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+ return;
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+ }
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+
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smp_update_key_mask(p_cb, SMP_SEC_KEY_TYPE_CSRK, true);
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/* save CSRK to security record */
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diff --git a/stack/smp/smp_int.h b/stack/smp/smp_int.h
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index fc8717f7c..e0ee76a1a 100644
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--- a/stack/smp/smp_int.h
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+++ b/stack/smp/smp_int.h
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@@ -479,6 +479,7 @@ extern void smp_xor_128(BT_OCTET16 a, BT_OCTET16 b);
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extern bool smp_encrypt_data(uint8_t* key, uint8_t key_len, uint8_t* plain_text,
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uint8_t pt_len, tSMP_ENC* p_out);
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extern bool smp_command_has_invalid_parameters(tSMP_CB* p_cb);
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+extern bool smp_command_has_invalid_length(tSMP_CB* p_cb);
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extern void smp_reject_unexpected_pairing_command(const RawAddress& bd_addr);
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extern tSMP_ASSO_MODEL smp_select_association_model(tSMP_CB* p_cb);
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extern void smp_reverse_array(uint8_t* arr, uint8_t len);
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diff --git a/stack/smp/smp_utils.cc b/stack/smp/smp_utils.cc
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index 441b178d1..36a7b1be8 100644
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--- a/stack/smp/smp_utils.cc
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+++ b/stack/smp/smp_utils.cc
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@@ -936,6 +936,33 @@ void smp_proc_pairing_cmpl(tSMP_CB* p_cb) {
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if (p_callback) (*p_callback)(SMP_COMPLT_EVT, pairing_bda, &evt_data);
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}
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+/*******************************************************************************
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+ *
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+ * Function smp_command_has_invalid_length
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+ *
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+ * Description Checks if the received SMP command has invalid length
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+ * It returns true if the command has invalid length.
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+ *
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+ * Returns true if the command has invalid length, false otherwise.
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+ *
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+ ******************************************************************************/
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+bool smp_command_has_invalid_length(tSMP_CB* p_cb) {
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+ uint8_t cmd_code = p_cb->rcvd_cmd_code;
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+
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+ if ((cmd_code > (SMP_OPCODE_MAX + 1 /* for SMP_OPCODE_PAIR_COMMITM */)) ||
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+ (cmd_code < SMP_OPCODE_MIN)) {
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+ SMP_TRACE_WARNING("%s: Received command with RESERVED code 0x%02x",
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+ __func__, cmd_code);
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+ return true;
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+ }
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+
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+ if (!smp_command_has_valid_fixed_length(p_cb)) {
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+ return true;
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+ }
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+
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+ return false;
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+}
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+
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/*******************************************************************************
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*
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* Function smp_command_has_invalid_parameters
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