CWE-203

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.

Common consequences

• Confidentiality, Access Control → Read Application Data, Bypass Protection Mechanism
• Confidentiality → Read Application Data

Mitigations

• Architecture and Design: Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinf
• Implementation: Ensure that error messages only contain minimal details that are useful to the intended audience and no one else. The messages need to strike the balance between being too cryptic (which can confuse users) or being too detailed (which may reveal more than intended). The messages should not reveal the methods that were used to determine the error. Attackers can use detailed informat