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CWE-566

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CWE-566

Authorization Bypass Through User-Controlled SQL Primary Key

Variant
Incomplete

Description

The product uses a database table that includes records that should not be accessible to an actor, but it executes a SQL statement with a primary key that can be controlled by that actor.

{"xhtml:p":["When a user can set a primary key to any value, then the user can modify the key to point to unauthorized records.","Database access control errors occur when:"],"xhtml:ul":[{"xhtml:li":["Data enters a program from an untrusted source.","The data is used to specify the value of a primary key in a SQL query.","The untrusted source does not have the permissions to be able to access all rows in the associated table."]}]}

Common Consequences

Scope

Confidentiality
Integrity
Access Control

Impact

Read Application Data, Modify Application Data, Bypass Protection Mechanism

Potential Mitigations

Implementation

Assume all input is malicious. Use a standard input validation mechanism to validate all input for length, type, syntax, and business rules before accepting the data. Use an "accept known good" validation strategy.

Implementation

Use a parameterized query AND make sure that the accepted values conform to the business rules. Construct your SQL statement accordingly.

Applicable Platforms

SQL

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