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-rw-r--r--src/lib/protocols/natpmp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/lib/protocols/natpmp.c b/src/lib/protocols/natpmp.c
index 994ee1d6a..100ff17c0 100644
--- a/src/lib/protocols/natpmp.c
+++ b/src/lib/protocols/natpmp.c
@@ -150,7 +150,7 @@ static int ndpi_search_natpmp_extra(struct ndpi_detection_module_struct *ndpi_st
case NATPMP_RESPONSE_TCP_MAPPING:
{
flow->protos.natpmp.internal_port = ntohs(get_u_int16_t(packet->payload, 8));
- flow->protos.natpmp.external_port = ntohs(get_u_int16_t(packet->payload, 12));
+ flow->protos.natpmp.external_port = ntohs(get_u_int16_t(packet->payload, 10));
if (flow->protos.natpmp.internal_port == 0 || flow->protos.natpmp.external_port == 0)
{
ndpi_set_risk(ndpi_struct, flow, NDPI_MALFORMED_PACKET, "Port Mapping Response: Internal/External port must not 0");