CWE-572: Call to Thread run() instead of start()
The product calls a thread's run() method instead of calling start(), which causes the code to run in the thread of the caller instead of the callee.
How it's found
Call to Thread run() instead of start() is a specific, narrowly defined instance of a broader pattern. Testers confirm it with targeted code review and a proof-of-concept input that exercises the exact code path this weakness describes.
In most cases a direct call to a Thread object's run() method is a bug. The programmer intended to begin a new thread of control, but accidentally called run() instead of start(), so the run() method will execute in the caller's thread of control.
Consequences
- Quality Degradation, Varies by Context
Mitigations
- Implementation: Use the start() method instead of the run() method.
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-572?
The product calls a thread's run() method instead of calling start(), which causes the code to run in the thread of the caller instead of the callee.
How do you find Call to Thread run() instead of start()?
Call to Thread run() instead of start() is a specific, narrowly defined instance of a broader pattern. Testers confirm it with targeted code review and a proof-of-concept input that exercises the exact code path this weakness describes.
What is the impact of CWE-572?
Quality Degradation, Varies by Context
Does TurboPentest test for Call to Thread run() instead of start()?
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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