CWE-210: Information Exposure Through Self-generated Error Message
Weakness ID: 210
The software identifies an error condition and creates its own diagnostic or error messages that contain sensitive information.
Time of Introduction
Architecture and Design
Technical Impact: Read application
The following code uses custom configuration files for each user in
the application. It checks to see if the file exists on the system before
attempting to open and use the file. If the configuration file does not
exist, then an error is generated, and the application exits.
If this code is running on a server, such as a web application, then
the person making the request should not know what the full pathname of
the configuration directory is. By submitting a username that is not
associated with a configuration file, an attacker could get this
pathname from the error message. It could then be used to exploit path
traversal, symbolic link following, or other problems that may exist
elsewhere in the application.