CWE-12

Variant Abstraction Level
Pillar — Highest-level weakness category
Class — Abstract, language-independent
Base — Specific enough to detect
Variant — Tied to specific technology
Compound — Requires multiple weaknesses Draft MITRE CWE Status
Stable — Fully reviewed and complete
Draft — Under development, may change
Incomplete — Partially defined by MITRE
Deprecated — No longer recommended
Obsolete — Replaced by another CWE
ASP.NET Misconfiguration: Missing Custom Error Page

Description

An ASP .NET application must enable custom error pages in order to prevent attackers from mining information from the framework's built-in responses.

Consequences

Confidentiality — Read Application Data

Default error pages gives detailed information about the error that occurred, and should not be used in production environments. Attackers can leverage the additional information provided by a default error page to mount attacks targeted on the framework, database, or other resources used by the application.

Mitigations

Phase: System Configuration

Handle exceptions appropriately in source code. ASP .NET applications should be configured to use custom error pages instead of the framework default page.

Phase: Architecture and Design

Do not attempt to process an error or attempt to mask it.

Phase: Implementation

Verify return values are correct and do not supply sensitive information about the system.