From 7afa40390b26ad1f4cf93deaa0052fe7e357ef33 Mon Sep 17 00:00:00 2001
From: Michael Zillgith <michael.zillgith@mz-automation.de>
Date: Wed, 27 Mar 2024 12:26:58 +0000
Subject: [PATCH] - ACSE: added check for minimum message size (LIB61850-438)

---
 src/mms/iso_acse/acse.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/mms/iso_acse/acse.c b/src/mms/iso_acse/acse.c
index f46b024d6..40ecafe04 100644
--- a/src/mms/iso_acse/acse.c
+++ b/src/mms/iso_acse/acse.c
@@ -420,6 +420,14 @@ AcseConnection_parseMessage(AcseConnection* self, ByteBuffer* message)
 {
     AcseIndication indication = ACSE_ERROR;
 
+    if (message == NULL || message->size < 1)
+    {
+        if (DEBUG_ACSE)
+            printf("ACSE: invalid message - no payload\n");
+
+        return ACSE_ERROR;
+    }
+
     uint8_t* buffer = message->buffer;
 
     int messageSize = message->size;