CWE-334: Small Space of Random Values
The number of possible random values is smaller than needed by the product, making it more susceptible to brute force attacks.
How it's found
Small Space of Random Values 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.
Consequences
- Bypass Protection Mechanism, Other: An attacker could easily guess the values used. This could lead to unauthorized access to a system if the seed is used for authentication and authorization.
Mitigations
- Architecture and Design/Requirements: Use products or modules that conform to FIPS 140-2 [REF-267] to avoid obvious entropy problems. Consult FIPS 140-2 Annex C ("Approved Random Number Generators").
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-334?
The number of possible random values is smaller than needed by the product, making it more susceptible to brute force attacks.
How do you find Small Space of Random Values?
Small Space of Random Values 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-334?
Bypass Protection Mechanism, Other: An attacker could easily guess the values used. This could lead to unauthorized access to a system if the seed is used for authentication and authorization.
Does TurboPentest test for Small Space of Random Values?
This weakness is not covered by the automated black-box pentest. IntegSec pentesters cover it in a manual engagement.
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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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