An application verifies resource attributes once but does not verify them again before use. Is this behavior considered a possible synchronization flaw if a malicious user changes the resource after the initial verification?
True
False
The behavior can lead to a time-of-check/time-of-use (TOCTOU) flaw. After the initial verification, an attacker could swap or modify what was verified, creating a race condition in which the application’s later logic no longer matches the originally verified resource state. If the resource is not re-verified, the application may process altered data or grant unintended access. Some might think verifying once is enough, but without repeated checks, the application is exposed to covert changes that happen after the initial verification.
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