A simple analysis of an upload function upload vulnerability break-vulnerability warning-the black bar safety net

Function fnUploadImgByVal upFile As HttpPostedFile, ByVal uploadPath As String As String Dim result As String = "" Dim intImgSize As Int32 intImgSize = upFile. ContentLength If intImgSize 0 Then If intImgSize 5 0 0 0 0 0 Then result = "images too large" Return result Exit Function End If Dim...