逐浪CMS通用型SQL注入漏洞分析与利用(asp.net)

绕过了那个很简单的防注入。直接可以update管理员密码。

页面的按钮点击事件：

protected void Btn_Click调用了b_Arrive.UpdateState(text);

public bool UpdateState(string ArriveNo)
{

string sqlStr = "Update ZL_Arrive SET State =1 WHERE ArriveNO=’" + ArriveNo + "’";  ///果断注入

return SqlHelper.ExecuteSql(sqlStr);

}

public static void StartProcessRequest()

{

try

{

if (HttpContext.Current.Request.QueryString != null)

{

for (int i = 0; i < HttpContext.Current.Request.QueryString.Count; i++)

{

string getkeys = HttpContext.Current.Request.QueryString.Keys;

if (!DataSecurity.ProcessSqlStr(HttpContext.Current.Request.QueryString[getkeys]))

{

function.WriteErrMsg("数据不能包含SQL注入代码!");

HttpContext.Current.Response.End();

}

}

}

if (HttpContext.Current.Request.Form != null)

{

for (int j = 0; j < HttpContext.Current.Request.Form.Count; j++)

{

string getkeys = HttpContext.Current.Request.Form.Keys[j];

if (!DataSecurity.ProcessSqlStr(HttpContext.Current.Request.Form[getkeys]))

{

function.WriteErrMsg("数据不能包含SQL注入代码!");

HttpContext.Current.Response.End();

}

}

}

}

……

}

里面还调用到一个DataSecurity.ProcessSqlStr

public static bool ProcessSqlStr(string Str)

{

bool ReturnValue = true;

Str = Str.ToLower();

try

{

if (Str != "")

{

string SqlStr = "and |exec |insert |select |delete |update |count |chr |mid |master |truncate |char |declare ";

string[] anySqlStr = SqlStr.Split(new char[]

{

’|’

});

string[] array = anySqlStr;

for (int i = 0; i < array.Length; i++)

{

string ss = array;

if (Str.IndexOf(ss) >= 0)

{

ReturnValue = false;

}

}

}

}

catch

{

ReturnValue = false;

}

return ReturnValue;

}