CWE-242β€”Use of Inherently Dangerous Function

PUBLISHEDweakness recordHigh
released 2006-07-19 Β· last modified 2026-04-30

Metadata

CWE ID:
CWE-242
Abstraction:
Base
Structure:
Simple
Status:
Draft
Release Date:
2006-07-19
Latest Modification Date:
2026-04-30

Weakness Name

Use of Inherently Dangerous Function

Description

The product calls a function that can never be guaranteed to work safely.

Certain functions behave in dangerous ways regardless of how they are used. Functions in this category were often implemented without taking security concerns into account. The gets() function is unsafe because it does not perform bounds checking on the size of its input. An attacker can easily send arbitrarily-sized input to gets() and overflow the destination buffer. Similarly, the >> operator is unsafe to use when reading into a statically-allocated character array because it does not perform bounds checking on the size of its input. An attacker can easily send arbitrarily-sized input to the >> operator and overflow the destination buffer.

Common Consequences

Scope:
Other
Impact:
Varies by Context

Related Weaknesses