| Any application providing too much information in error messages risks compromising the data and security of the application and system. The structure and content of error messages needs to be carefully considered by the organization and development team.
Organizations carefully consider the structure/content of error messages. The extent to which information systems are able to identify and handle error conditions is guided by organizational policy and operational requirements. Information that could be exploited by adversaries includes, for example, erroneous logon attempts with passwords entered by mistake as the username, mission/business information that can be derived from (if not stated explicitly by) information recorded, and personal information, such as account numbers, social security numbers, and credit card numbers.
The DNS protocol requires the use of error messages to handle certain conditions, such as a DNSSEC query that returns a negative result. It is important that error messages, including version headers, do not contain unnecessary information or the DNS server could be attacked using a more targeted approach. |
