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fix(bt/bluedroid): fixed potential OOB read in the avrc_pars_vendor_rsp

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This commit is contained in:
Jin Cheng
2025-10-11 17:09:31 +08:00
parent d6e6b14236
commit 866130578f
1 changed files with 34 additions and 0 deletions
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34
components/bt/host/bluedroid/stack/avrc/avrc_pars_ct.c
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@@ -55,13 +55,27 @@ static tAVRC_STS avrc_pars_vendor_rsp(tAVRC_MSG_VENDOR *p_msg, tAVRC_RESPONSE *p
if (p_msg->p_vendor_data == NULL) {
return AVRC_STS_INTERNAL_ERR;
}
if (p_msg->vendor_len < 4) {
AVRC_TRACE_WARNING("message length %u too short: must be at least 4", p_msg->vendor_len);
return AVRC_STS_INTERNAL_ERR;
}
p = p_msg->p_vendor_data;
BE_STREAM_TO_UINT8 (p_result->pdu, p);
p++; /* skip the reserved/packe_type byte */
BE_STREAM_TO_UINT16 (len, p);
AVRC_TRACE_DEBUG("avrc_pars_vendor_rsp() ctype:0x%x pdu:0x%x, len:%d/0x%x", p_msg->hdr.ctype, p_result->pdu, len, len);
if (p_msg->vendor_len < len + 4) {
AVRC_TRACE_WARNING("message length %u too short: must be at least %u", p_msg->vendor_len, len + 4);
return AVRC_STS_INTERNAL_ERR;
}
if (p_msg->hdr.ctype == AVRC_RSP_REJ) {
if (len < 1) {
AVRC_TRACE_WARNING("invalid message length %u: must be at least 1", len);
return AVRC_STS_INTERNAL_ERR;
}
p_result->rsp.status = *p;
return p_result->rsp.status;
}
@@ -82,10 +96,18 @@ static tAVRC_STS avrc_pars_vendor_rsp(tAVRC_MSG_VENDOR *p_msg, tAVRC_RESPONSE *p
case AVRC_PDU_REGISTER_NOTIFICATION: /* 0x31 */
#if (AVRC_ADV_CTRL_INCLUDED == TRUE)
if (len < 1) {
AVRC_TRACE_WARNING("invalid message length %u: must be at least 1", len);
return AVRC_STS_INTERNAL_ERR;
}
BE_STREAM_TO_UINT8 (eventid, p);
if (AVRC_EVT_VOLUME_CHANGE == eventid
&& (AVRC_RSP_CHANGED == p_msg->hdr.ctype || AVRC_RSP_INTERIM == p_msg->hdr.ctype
|| AVRC_RSP_REJ == p_msg->hdr.ctype || AVRC_RSP_NOT_IMPL == p_msg->hdr.ctype)) {
if (len < 2) {
AVRC_TRACE_WARNING("invalid message length %u: must be at least 2", len);
return AVRC_STS_INTERNAL_ERR;
}
p_result->reg_notif.status = p_msg->hdr.ctype;
p_result->reg_notif.event_id = eventid;
BE_STREAM_TO_UINT8 (p_result->reg_notif.param.volume, p);
@@ -95,18 +117,30 @@ static tAVRC_STS avrc_pars_vendor_rsp(tAVRC_MSG_VENDOR *p_msg, tAVRC_RESPONSE *p
break;
#endif /* (AVRC_ADV_CTRL_INCLUDED == TRUE) */
case AVRC_PDU_GET_CAPABILITIES: /* 0x10 */
if (len < 2) {
AVRC_TRACE_WARNING("invalid message length %u: must be at least 2", len);
return AVRC_STS_INTERNAL_ERR;
}
BE_STREAM_TO_UINT8 (p_result->get_caps.capability_id, p);
BE_STREAM_TO_UINT8 (p_result->get_caps.count, p);
if (p_result->get_caps.capability_id == AVRC_CAP_EVENTS_SUPPORTED) {
if (p_result->get_caps.count > AVRC_CAP_MAX_NUM_EVT_ID) {
status = AVRC_STS_INTERNAL_ERR;
} else {
if (len < 2 + p_result->get_caps.count) {
AVRC_TRACE_WARNING("invalid message length %u: must be at least %d", len, 2 + p_result->get_caps.count);
return AVRC_STS_INTERNAL_ERR;
}
BE_STREAM_TO_ARRAY(p, p_result->get_caps.param.event_id, p_result->get_caps.count);
}
} else if (p_result->get_caps.capability_id == AVRC_CAP_COMPANY_ID) {
if (p_result->get_caps.count > AVRC_CAP_MAX_NUM_COMP_ID) {
status = AVRC_STS_INTERNAL_ERR;
} else {
if (len < 2 + p_result->get_caps.count * 6) {
AVRC_TRACE_WARNING("invalid message length %u: must be at least %d", len, 2 + p_result->get_caps.count * 6);
return AVRC_STS_INTERNAL_ERR;
}
for (int i = 0; i < p_result->get_caps.count; ++i) {
BE_STREAM_TO_UINT24(p_result->get_caps.param.company_id[i], p);
}