WooYun.org

……
        extTable.Add("image", "gif,jpg,jpeg,png,bmp");
        extTable.Add("flash", "swf,flv");
        extTable.Add("apw", "apw");
        extTable.Add("media", "swf,flv,mp3,mp4,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
        extTable.Add("file", "cs,doc,ppt,pptx,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2,dll,exe,dbo,oleb");
        HttpPostedFile file = context.Request.Files["Filedata"];
        string _folder = context.Server.MapPath(context.Request["folder"]);
        String fileExt = Path.GetExtension(file.FileName).ToLower();
        string uploadPath = context.Server.MapPath("~/upload") + "\\";
        bool nodate = false;
        bool wname = false;
        string folder = "";
        if (Array.IndexOf(((String)extTable["image"]).Split(','), fileExt.Substring(1).ToLower()) != -1)
        {
            folder = "image";
        }
        …………
//如果以上后缀都对不上的话，直接命名文件夹为other
        else
        {
            folder = "other";
        }
        if (nodate)
        {
            uploadPath += folder;
        }
        else
        {
            uploadPath += folder + "\\" + Utility.NowTime.ToString("yyyyMMdd", DateTimeFormatInfo.InvariantInfo);
        }
        if (file != null)
        {
            if (!Directory.Exists(uploadPath))
            {
                Directory.CreateDirectory(uploadPath);
            }
//最后拼凑路径的时候直接使用了file.FileName没有重命名！ 
            var fname = uploadPath + "\\" + Utility.NowTime.ToString("HHmmss", DateTimeFormatInfo.InvariantInfo) + file.FileName;
            file.SaveAs(fname);
            if (wname)
            {
                context.Response.Write(fname);
            }
            else
            {
                context.Response.Write("0");
            }
            
        }