From 38b9829d6a3d37a61e31847737bb16c2fd5669fb Mon Sep 17 00:00:00 2001
From: Tal Aloni <tal.aloni.il@gmail.com>
Date: Fri, 3 Feb 2017 00:23:29 +0200
Subject: [PATCH] DirectoryFileSystem: Updated ValidatePath to verify that path
 starts with a blackslash

---
 SMBServer/DirectoryFileSystem/DirectoryFileSystem.cs | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/SMBServer/DirectoryFileSystem/DirectoryFileSystem.cs b/SMBServer/DirectoryFileSystem/DirectoryFileSystem.cs
index 25744fd..d3efcf6 100644
--- a/SMBServer/DirectoryFileSystem/DirectoryFileSystem.cs
+++ b/SMBServer/DirectoryFileSystem/DirectoryFileSystem.cs
@@ -276,9 +276,14 @@ namespace SMBServer
 
         private void ValidatePath(string path)
         {
-            if (path.StartsWith(@"..\") || path.Contains(@"\..\"))
+            if (path != String.Empty && !path.StartsWith(@"\"))
             {
-                throw new UnauthorizedAccessException("Given path is not allowed");
+                throw new ArgumentException("Path must start with a backslash");
+            }
+
+            if (path.Contains(@"\..\"))
+            {
+                throw new ArgumentException("Given path is not allowed");
             }
         }