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-rw-r--r--src/lib/protocols/stun.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/lib/protocols/stun.c b/src/lib/protocols/stun.c
index cf03ddaec..3e2e037f2 100644
--- a/src/lib/protocols/stun.c
+++ b/src/lib/protocols/stun.c
@@ -81,7 +81,9 @@ static ndpi_int_stun_t ndpi_int_check_stun(struct ndpi_detection_module_struct *
msg_type, payload_length, flow->protos.stun_ssl.stun.num_binding_requests);
*/
- if(((payload[0] == 0x80) && ((msg_len+20) <= payload_length)) /* WhatsApp Voice */) {
+ if(((payload[0] == 0x80)
+ && (payload_length < 512)
+ && ((msg_len+20) <= payload_length)) /* WhatsApp Voice */) {
*is_whatsapp = 1;
return NDPI_IS_STUN; /* This is WhatsApp Voice */
} else if((payload[0] == 0x90)