An issue was discovered on Siemens SICAM RTUs SM-2556 COM Modules with the firmware variants ENOS00, ERAC00, ETA2, ETLS00, MODi00, and DNPi00. The integrated web server (port 80/tcp) of the affected devices could allow unauthenticated remote attackers to execute arbitrary code on the affected device.
The product initializes or sets a resource with a default that is intended to be changed by the administrator, but the default is not secure.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Sm-2556_firmware | Siemens | dnpi00 (including) | dnpi00 (including) |
| Sm-2556_firmware | Siemens | enos00 (including) | enos00 (including) |
| Sm-2556_firmware | Siemens | erac00 (including) | erac00 (including) |
| Sm-2556_firmware | Siemens | eta2 (including) | eta2 (including) |
| Sm-2556_firmware | Siemens | etls00 (including) | etls00 (including) |
| Sm-2556_firmware | Siemens | modi00 (including) | modi00 (including) |
Developers often choose default values that leave the product as open and easy to use as possible out-of-the-box, under the assumption that the administrator can (or should) change the default value. However, this ease-of-use comes at a cost when the default is insecure and the administrator does not change it.