An issue was discovered in SALTO ProAccess SPACE 5.4.3.0. The products webserver runs as a Windows service with local SYSTEM permissions by default. This is against the principle of least privilege. An attacker who is able to exploit CVE-2019-19458 or CVE-2019-19459 is basically able to write to every single path on the file system, because the webserver is running with the highest privileges available.
Weakness
During installation, installed file permissions are set to allow anyone to modify those files.
Affected Software
| Name |
Vendor |
Start Version |
End Version |
| Proaccess_space |
Saltosystem |
* |
5.5 (including) |
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