CWE-120

• CWE ID
• 120

• CWE Name
• Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

• CWE Abstraction
• Base

• CWE structure
• Simple

• CWE Status
• Incomplete

The program copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

A buffer overflow condition exists when a program attempts to put more data in a buffer than it can hold, or when a program attempts to put data in a memory area outside of the boundaries of a buffer. The simplest type of error, and the most common cause