312-50V12 · Question #254
A large multinational corporation is in the process of evaluating its security infrastructure to identify potential vulnerabilities. After a comprehensive analysis, they found multiple areas of…
The correct answer is B. Ensuring atomicity of operations between checking and using data resources. TOC/TOU errors arise when a system's state changes between the time a condition is checked and the time that condition is used, leading to potential vulnerabilities. The best mitigation involves making these operations indivisible.
Question
Options
- ARegular patching of servers, firmware, operating system, and applications
- BEnsuring atomicity of operations between checking and using data resources
- CFrequently updating firewall configurations to prevent intrusion attempts
- DImplementing stronger encryption algorithms for all data transfers
How the community answered
(34 responses)- A15% (5)
- B76% (26)
- C3% (1)
- D6% (2)
Why each option
TOC/TOU errors arise when a system's state changes between the time a condition is checked and the time that condition is used, leading to potential vulnerabilities. The best mitigation involves making these operations indivisible.
Regular patching mitigates vulnerabilities due to outdated software but does not directly address the logical race conditions inherent in time of check/time of use errors.
TOC/TOU errors exploit a race condition where a system's state changes between a security check and its subsequent use; ensuring atomicity guarantees that the state remains consistent during the entire operation, thereby preventing this vulnerability by making the check and use an indivisible unit.
Frequently updating firewall configurations focuses on network intrusion prevention and access control, which is distinct from preventing internal application logic flaws like TOC/TOU errors.
Implementing stronger encryption algorithms primarily protects data confidentiality and integrity, but it does not resolve the logical flaw where a resource's state changes unexpectedly between a security check and its subsequent use.
Concept tested: Mitigating Time of Check/Time of Use (TOC/TOU) Race Conditions
Source: https://owasp.org/www-community/vulnerabilities/Time_of_Check_to_Time_of_Use_(TOCTOU)
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