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examples/nanocoap_server: fix a buffer overflow bug

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This commit is contained in:
krzysztof-cabaj 2021-04-26 05:52:03 -04:00
parent fed2c8e87e
commit 68ccf36754
1 changed files with 10 additions and 5 deletions
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15
examples/nanocoap_server/coap_handler.c
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@ -97,11 +97,16 @@ static ssize_t _riot_value_handler(coap_pkt_t *pkt, uint8_t *buf, size_t len, vo
case COAP_PUT:
case COAP_POST:
{
/* convert the payload to an integer and update the internal value */
char payload[16] = { 0 };
memcpy(payload, (char*)pkt->payload, pkt->payload_len);
internal_value = strtol(payload, NULL, 10);
code = COAP_CODE_CHANGED;
if (pkt->payload_len < 16) {
/* convert the payload to an integer and update the internal value */
char payload[16] = { 0 };
memcpy(payload, (char*)pkt->payload, pkt->payload_len);
internal_value = strtol(payload, NULL, 10);
code = COAP_CODE_CHANGED;
}
else {
code = COAP_CODE_REQUEST_ENTITY_TOO_LARGE;
}
}
}