From fa950a554aa1ed4c94b41833a2b9440d6ff9e42a Mon Sep 17 00:00:00 2001
From: Dehravor <dehravor@gmail.com>
Date: Fri, 25 Apr 2014 22:59:22 +0200
Subject: Core/WorldSocket: Fix crash when CMSG_AUTH_SESSION contains modified
 addon size value

---
 src/server/game/Server/WorldSocket.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/server/game/Server/WorldSocket.cpp b/src/server/game/Server/WorldSocket.cpp
index 161fd61796f..737a2f8cbf1 100644
--- a/src/server/game/Server/WorldSocket.cpp
+++ b/src/server/game/Server/WorldSocket.cpp
@@ -835,8 +835,12 @@ int WorldSocket::HandleAuthSession(WorldPacket& recvPacket)
     recvPacket >> digest[13];
 
     recvPacket >> addonSize;
-    addonsData.resize(addonSize);
-    recvPacket.read((uint8*)addonsData.contents(), addonSize);
+
+    if (addonSize)
+    {
+        addonsData.resize(addonSize);
+        recvPacket.read((uint8*)addonsData.contents(), addonSize);
+    }
 
     recvPacket.ReadBit();
     uint32 accountNameLength = recvPacket.ReadBits(12);
-- 
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