CWE-69: Improper Handling of Windows ::DATA Alternate Data Stream
The product does not properly prevent access to, or detect usage of, alternate data streams (ADS).
How it's found
Improper Handling of Windows ::DATA Alternate Data Stream 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.
An attacker can use an ADS to hide information about a file (e.g. size, the name of the process) from a system or file browser tools such as Windows Explorer and 'dir' at the command line utility. Alternately, the attacker might be able to bypass intended access restrictions for the associated data fork.
Consequences
- Bypass Protection Mechanism, Hide Activities, Other
Mitigations
- Implementation: Ensure that the source code correctly parses the filename to read or write to the correct stream.
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-69?
The product does not properly prevent access to, or detect usage of, alternate data streams (ADS).
How do you find Improper Handling of Windows ::DATA Alternate Data Stream?
Improper Handling of Windows ::DATA Alternate Data Stream 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-69?
Bypass Protection Mechanism, Hide Activities, Other
Does TurboPentest test for Improper Handling of Windows ::DATA Alternate Data Stream?
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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