CWE-639Authorization Bypass Through User-Controlled Key

Description

Common consequences· 3

• Access Control — Bypass Protection Mechanism
  Access control checks for specific user data or functionality can be bypassed.
• Access Control — Gain Privileges or Assume Identity
  Horizontal escalation of privilege is possible (one user can view/modify information of another user).
• Access Control — Gain Privileges or Assume Identity
  Vertical escalation of privilege is possible if the user-controlled key is actually a flag that indicates administrator status, allowing the attacker to gain administrative access.

Potential mitigations· 3

• [Architecture and Design]For each and every data access, ensure that the user has sufficient privilege to access the record that is being requested.
• [Architecture and Design, Implementation]Make sure that the key that is used in the lookup of a specific user's record is not controllable externally by the user or that any tampering can be detected.
• [Architecture and Design]Use encryption in order to make it more difficult to guess other legitimate values of the key or associate a digital signature with the key so that the server can verify that there has been no tampering.

Compliance frameworks addressing this (incoming)3

(incoming)147

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Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.