CWE-474: Use of Function with Inconsistent Implementations
The code uses a function that has inconsistent implementations across operating systems and versions.
How it's found
Use of Function with Inconsistent Implementations is typically found by tracing untrusted input from where it enters the system to the point where it is used without the check or neutralization this weakness describes, combining manual code review with dynamic testing.
The use of inconsistent implementations can cause changes in behavior when the code is ported or built under a different environment than the programmer expects, which can lead to security problems in some cases. The implementation of many functions varies by platform, and at times, even by different versions of the same platform. Implementation differences can include:Slight differences in the way parameters are interpreted leading to inconsistent results. Some implementations of the function carry significant security risks. The function might not be defined on all platforms. The function might change which return codes it can provide, or change the meaning of its return codes.
Consequences
- Quality Degradation, Varies by Context
Mitigations
- Architecture and Design/Requirements: Do not accept inconsistent behavior from the API specifications when the deviant behavior increase the risk level.
Where this fits in a TurboPentest engagement
This weakness is not covered by the automated black-box pentest. IntegSec pentesters cover it in a manual engagement.
Frequently asked questions
What is CWE-474?
The code uses a function that has inconsistent implementations across operating systems and versions.
How do you find Use of Function with Inconsistent Implementations?
Use of Function with Inconsistent Implementations is typically found by tracing untrusted input from where it enters the system to the point where it is used without the check or neutralization this weakness describes, combining manual code review with dynamic testing.
What is the impact of CWE-474?
Quality Degradation, Varies by Context
Does TurboPentest test for Use of Function with Inconsistent Implementations?
This weakness is not covered by the automated black-box pentest. IntegSec pentesters cover it in a manual engagement.
Related CWEs
Written and reviewed by
Michel Chamberland - Founder & CEO, IntegSec
CISSP, OSCP, OSCE, CEH, GIAC, CCSK · 20+ years in offensive security
Michel has spent 20+ years on offensive security teams including IBM X-Force Red and Trustwave SpiderLabs, leading penetration tests, red team engagements, and breach response for Fortune 500 customers. He is the founder of IntegSec and the architect of TurboPentest.
Find these issues before an attacker does
TurboPentest runs an agentic AI pentest against your target and reports findings with proof, from $99 per target.
Start a pentest