CR | ๐ฃ๐ผ๐๐ #๐ฏ๐ฏ๐ฒ
[Topic: ๐ช๐ฒ๐ฎ๐ธ ๐๐ผ๐๐ฒ๐ฟ๐ป๐ฎ๐ป๐ฐ๐ฒ ๐ข๐๐ฒ๐ฟ ๐ง๐ถ๐บ๐ฒ-๐ผ๐ณ-๐๐ต๐ฒ๐ฐ๐ธ ๐๐ ๐ง๐ถ๐บ๐ฒ-๐ผ๐ณ-๐จ๐๐ฒ (๐ง๐ข๐๐ง๐ข๐จ) ๐๐ฎ๐ฝ๐ โ ๐ช๐ต๐ฒ๐ป ๐ฆ๐ฒ๐ฐ๐๐ฟ๐ถ๐๐ ๐ฉ๐ฎ๐น๐ถ๐ฑ๐ฎ๐๐ถ๐ผ๐ป ๐๐ฎ๐ฝ๐ฝ๐ฒ๐ป๐ ๐ง๐ผ๐ผ ๐๐ฎ๐ฟ๐น๐]
๐ค๐๐ถ๐ฐ๐ธ ๐๐ป๐๐ถ๐ด๐ต๐:
Many security controls validate conditions at one point in time โ authentication, authorization, compliance checks, file integrity, deployment approval.
But attackers exploit the gap between ๐๐ต๐ฒ๐ป ๐๐ผ๐บ๐ฒ๐๐ต๐ถ๐ป๐ด ๐ถ๐ ๐ฐ๐ต๐ฒ๐ฐ๐ธ๐ฒ๐ฑ ๐ฎ๐ป๐ฑ ๐๐ต๐ฒ๐ป ๐ถ๐ ๐ถ๐ ๐ฎ๐ฐ๐๐๐ฎ๐น๐น๐ ๐๐๐ฒ๐ฑ.
A system can be secure at validation time โ and compromised by execution time.
Common TOCTOU governance risks include:
- Access validated once, then reused long after context changes ๐
- Files scanned before execution but modified afterward ๐ณ๏ธ
- Deployment approvals granted before last-minute code changes โ ๏ธ
- Temporary permissions remaining active during delayed execution
- Tokens or sessions reused after posture or risk changes
- Security checks occurring asynchronously instead of continuously
โ ๏ธ If validation and execution are separated by time, attackers target the gap between them.
๐๐๐ฑ๐ถ๐ ๐ง๐ถ๐ฝ:
โณ During AppSec, IAM, and DevSecOps audits, validate:
- Security validations occur ๐ฎ๐ ๐ฐ๐น๐ผ๐๐ฒ ๐ฎ๐ ๐ฝ๐ผ๐๐๐ถ๐ฏ๐น๐ฒ ๐๐ผ ๐ฒ๐ ๐ฒ๐ฐ๐๐๐ถ๐ผ๐ป ๐๐ถ๐บ๐ฒ
- Continuous verification replaces one-time trust decisions
- Sessions and tokens are re-evaluated based on changing risk context
- File integrity and deployment artifacts are verified immediately before use
- Critical actions trigger ๐ฟ๐ฒ๐ฎ๐น-๐๐ถ๐บ๐ฒ ๐ฎ๐๐๐ต๐ผ๐ฟ๐ถ๐๐ฎ๐๐ถ๐ผ๐ป ๐ฐ๐ต๐ฒ๐ฐ๐ธ๐
- Automation pipelines prevent post-approval modifications without revalidation
๐๐ฐ๐๐ถ๐ผ๐ป๐ฎ๐ฏ๐น๐ฒ ๐ฅ๐ฒ๐บ๐ถ๐ป๐ฑ๐ฒ๐ฟ:
Ask your security or engineering team:
- Are we validating security continuously โ or only once?
- Could conditions change between approval and execution?
- Do any workflows rely on stale trust decisions?
- Could attackers exploit timing gaps in our controls?
If security checks happen too early, attackers will operate in the window before enforcement catches up.
๐๐ป ๐ฐ๐๐ฏ๐ฒ๐ฟ๐๐ฒ๐ฐ๐๐ฟ๐ถ๐๐, ๐๐ฟ๐๐๐ ๐บ๐๐๐ ๐ฟ๐ฒ๐บ๐ฎ๐ถ๐ป ๐๐ฎ๐น๐ถ๐ฑ ๐ฎ๐ ๐๐ต๐ฒ ๐บ๐ผ๐บ๐ฒ๐ป๐ ๐ผ๐ณ ๐ฎ๐ฐ๐๐ถ๐ผ๐ป โ ๐ป๐ผ๐ ๐ท๐๐๐ ๐ฎ๐ ๐๐ต๐ฒ ๐บ๐ผ๐บ๐ฒ๐ป๐ ๐ผ๐ณ ๐ฎ๐ฝ๐ฝ๐ฟ๐ผ๐๐ฎ๐น.