关键词: 工业控制系统, 终端安全, 渗透测试, 输入验证错误漏洞, 种子变异模式

Abstract: The security of industrial control system terminals is getting crucial with the development of the industrial Internet. How to conduct effective safety tests for industrial control system terminals has become a key problem to be studied and solved urgently. In this paper, the general process of penetration testing is firstly introduced, then the application of penetration testing for industrial control system terminals is examined using improper input validation vulnerability as an example. The method starts from information collection and penetration tools to deeply understand the system input verification. Then, during the stage of the vulnerability discovery, the modeling of the vulnerability to sensitive input is proposed, as well as the seed mutation pattern for the industrial control programs is designed. The experiment demonstrates the effectiveness of the proposed method and the vulnerability widely existed in the industrial control systems. This method also discovers the security threats such as data tampering, denial of service, permission access and malicious script injection caused by the input validation vulnerability. At last, this work provides security suggestions for industrial control network security protection and equipment protection.

Key words: industrial control system, terminal security, penetration testing, improper input validation vulnerability, seed mutation pattern