SAP NetWeaver Application Server ABAP allows an unauthenticated attacker with network access to read files from the server, which otherwise would be restricted.This attack is possible only if a Web Dispatcher or some sort of Proxy Server is in use and the file in question was previously opened or downloaded in an application based on SAP GUI for HTML Technology. This will not compromise the applications integrity or availability.
Weakness
During installation, installed file permissions are set to allow anyone to modify those files.
Potential Mitigations
- 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 reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
References