OWASP Education Computer based training The OWASP Foundation

OWASP Education Computer based training The OWASP Foundation http: //www. owasp. org CERT Secure Coding Nishi Kumar IT Architect Specialist, FIS Chair, Software Security Forum at FIS OWASP CBT Project Lead OWASP Global Industry Committee Nishi. Kumar@owasp. org Contributor and Reviewer Keith Turpin

Objectives Understand Cert Secure Coding Standards 2

Cert Secure Coding goals Reduce vulnerabilities resulting from coding errors Identify common programming errors that lead to software vulnerabilities Establish secure coding standards Educate software developers to advance the state of the practice in secure coding 3

Cert Secure Coding Standards Establish coding guidelines for commonly used programming languages that can be used to improve the security of software systems under development Based on documented standard language versions as defined by official or de facto standards organizations Secure coding standards are under development for: The CERT C Secure Coding Standard, Version 2. 0 The CERT C++ Secure Coding Standard The CERT Oracle Secure Coding Standard for Java 4

The CERT Oracle Secure Coding Standard for Java Cert Secure Coding Standard for Java 00. Input Validation and Data Sanitization (IDS) 01. Declarations and Initialization (DCL) 02. Expressions (EXP) 03. Numeric Types and Operations (NUM) 04. Object Orientation (OBJ) 05. Methods (MET) 06. Exceptional Behavior (ERR) 07. Visibility and Atomicity (VNA) 5

The CERT Oracle Secure Coding Standard for Java Cert Secure Coding Standard for Java 08. Locking (LCK) 09. Thread APIs (THI) 10. Thread Pools (TPS) 11. Thread-Safety Miscellaneous (TSM) 12. Input Output (FIO) 14. Platform Security (SEC) 15. Runtime Environment (ENV) 16. Serialization (SER) 49. Miscellaneous (MSC) 6

IDS 01 -J. Sanitize untrusted data passed across a trust boundary Noncompliant Code Example public void do. Privileged. Action(String username, char[] password) throws SQLException { Connection connection = get. Connection(); if (connection == null) { // handle error } String pwd = hash. Password(password); String sql. String = "SELECT * FROM db_user WHERE username = '" + username + "' AND password = '" + pwd + "'"; Statement stmt = connection. create. Statement(); Result. Set rs = stmt. execute. Query(sql. String); if (!rs. next()) { throw new Security. Exception("User name or Password incorrect"); } // Authenticated; proceed } 7

IDS 01 -J. Sanitize untrusted data passed across a trust boundary Compliant Solution (Prepared. Statement) class Login { public void do. Privileged. Action(String username, char[] password) throws SQLException { Connection connection = get. Connection(); if (connection == null) { // handle error } String pwd = hash. Password(password); // Ensure that the length of user name is legitimate if ((username. length() >= 8) { // Handle error } String sql. String = "select * from db_user where username=? and password=? "; Prepared. Statement stmt = connection. prepare. Statement(sql. String); stmt. set. String (1, username); stmt. set. String (2, pwd); Result. Set rs = stmt. execute. Query(); if (!rs. next()) { throw new Security. Exception("User name or Password incorrect"); } // Authenticated; proceed } } 8

References CERT - www. cert. org The CERT® Program is part of the Software Engineering Institute (SEI). CERT's primary objectives include analyzing and communicating the state of internet security through its US-CERT Vulnerability Notes Database and improving software security with its secure coding practices publications. US-CERT Vulnerability Notes Database - http: //www. kb. cert. org/vuls/ CERT Secure Coding Practices - http: //www. cert. org/secure-coding/ 9

10