diff options
Diffstat (limited to 'epan/dissectors/packet-wireguard.c')
| -rw-r--r-- | epan/dissectors/packet-wireguard.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/epan/dissectors/packet-wireguard.c b/epan/dissectors/packet-wireguard.c index 527dadc6ae..e6b9a1e0bd 100644 --- a/epan/dissectors/packet-wireguard.c +++ b/epan/dissectors/packet-wireguard.c @@ -1145,8 +1145,12 @@ wg_mac1_key_probe(tvbuff_t *tvb, gboolean is_initiation) return NULL; } - const guint8 *mac1_msgdata = tvb_get_ptr(tvb, 0, mac1_offset); + guint8 *mac1_msgdata = (guint8 *)tvb_memdup(wmem_packet_scope(), tvb, 0, mac1_offset); const guint8 *mac1_output = tvb_get_ptr(tvb, mac1_offset, 16); + + // MAC1 is computed over a message with three reserved bytes set to zero. + mac1_msgdata[1] = mac1_msgdata[2] = mac1_msgdata[3] = 0; + // Find public key that matches the 16-byte MAC1 field. GHashTableIter iter; gpointer value; |