CWE-158 Improper Neutralization of Null Byte or NUL Character

What is CWE (Common Weakness Enumeration)?

The Common Weakness Enumeration (CWE) is a community-developed list of common software and hardware weaknesses. By identifying these weaknesses, developers and security practitioners can prioritize and address potential vulnerabilities early in the development cycle. Explore our comprehensive CWE list below to better understand and mitigate common security issues.

CAPEC Patterns referencing CWE-158

Below is a list of CAPEC attack patterns associated with this CWE-158. Click on each CAPEC to learn more. The right column shows the related weaknesses (including this one).

CAPEC

Related Weaknesses

Embedding NULL Bytes

CWE-20	Improper Input Validation
CWE-74	Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-158	Improper Neutralization of Null Byte or NUL Character
CWE-172	Encoding Error
CWE-173	Improper Handling of Alternate Encoding
CWE-697	Incorrect Comparison
CWE-707	Improper Neutralization

Postfix, Null Terminate, and Backslash

CWE-20	Improper Input Validation
CWE-74	Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-158	Improper Neutralization of Null Byte or NUL Character
CWE-172	Encoding Error
CWE-173	Improper Handling of Alternate Encoding
CWE-697	Incorrect Comparison
CWE-707	Improper Neutralization

About CWE-158: Improper Neutralization of Null Byte or NUL Character

CWE-158 is one of the established Common Weakness Enumerations that identifies a specific type of vulnerability in software. Detailed analysis of CWE-158 helps organizations understand the risks associated with this weakness and implement effective countermeasures.

Explore related attack patterns, best practices, and expert recommendations on this page. By understanding CWE-158, you can enhance your security posture and better protect your applications against exploitation.