CWE-477: Use of Obsolete Function
The code uses deprecated or obsolete functions, which suggests that the code has not been actively reviewed or maintained.
How it's found
Use of Obsolete Function 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.
As programming languages evolve, functions occasionally become obsolete due to: Functions that are removed are usually replaced by newer counterparts that perform the same task in some different and hopefully improved way.Advances in the language Improved understanding of how operations should be performed effectively and securely Changes in the conventions that govern certain operations
Consequences
- Quality Degradation
Mitigations
- Implementation: Refer to the documentation for the obsolete function in order to determine why it is deprecated or obsolete and to learn about alternative ways to achieve the same functionality.
- Requirements: Consider seriously the security implications of using an obsolete function. Consider using alternate functions.
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-477?
The code uses deprecated or obsolete functions, which suggests that the code has not been actively reviewed or maintained.
How do you find Use of Obsolete Function?
Use of Obsolete Function 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-477?
Quality Degradation
Does TurboPentest test for Use of Obsolete Function?
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.
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