CWE-758: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
The product uses an API function, data structure, or other entity in a way that relies on properties that are not always guaranteed to hold for that entity.
How it's found
Reliance on Undefined, Unspecified, or Implementation-Defined Behavior describes a general pattern rather than a single fixed bug. Testers use a mix of static analysis and manual code review to find where a target's code matches this pattern, then confirm exploitability by hand.
This can lead to resultant weaknesses when the required properties change, such as when the product is ported to a different platform or if an interaction error (CWE-435) occurs.
Consequences
- Reduce Maintainability, Unexpected State, Quality Degradation
Where this fits in a TurboPentest engagement
TurboPentest's agentic pentest is powerful and covers a broad range of issues automatically. This particular class is best confirmed in a manual IntegSec engagement, where human pentesters apply deeper methodology and a larger context window than any automated pass.
Frequently asked questions
What is CWE-758?
The product uses an API function, data structure, or other entity in a way that relies on properties that are not always guaranteed to hold for that entity.
How do you find Reliance on Undefined, Unspecified, or Implementation-Defined Behavior?
Reliance on Undefined, Unspecified, or Implementation-Defined Behavior describes a general pattern rather than a single fixed bug. Testers use a mix of static analysis and manual code review to find where a target's code matches this pattern, then confirm exploitability by hand.
What is the impact of CWE-758?
Reduce Maintainability, Unexpected State, Quality Degradation
Does TurboPentest test for Reliance on Undefined, Unspecified, or Implementation-Defined Behavior?
TurboPentest's agentic pentest is powerful and covers a broad range of issues automatically. This particular class is best confirmed in a manual IntegSec engagement, where human pentesters apply deeper methodology and a larger context window than any automated pass.
Related CWEs
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