B2_Chapter 4_D part 4.pdf - TOCTOU EXPLOITS Married couple...

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TOCTOU EXPLOITS Married couple example 1 Sign-in to bank website Open the fund transfer form Go to meeting Offer to give half Go to the bank and take a check Go home and complete fund transfer form
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AUTOMATICALLY INVALIDATING THE SESSION Solution: session management A session can be forcibly expired if the timestamp on the permission records for the user is newer than the creation timestamp of the session ID. 2
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WEB AUTHORIZATION BEST PRACTICES Failing closed Redirecting back to the applications’ root URL Operating with least privilege Fewest possible right and permissions Run on the host as a normal user, not admin Not making lazy authorization policy decisions If a user of certain role requires a permission: change role, make new role, or just deny. Separating duties Normal users and admin accounts Defining strong policies And make sure they are carried out Vulnerabilities introduced through human error are the bother of security systems.
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