Summary
Bender is publishing this advisory to inform customers about multiple security vulnerabilities in the Charge Controller product families.Bender has analysed the weaknesses and determined that the electrical safety of the devices is not concerned. To Benders knowledge, proof-of-concept code or exploits for the weaknesses are not available to the public.Bender considers some weaknesses to be critical and thus need to be patched immediately. Therefore, patches are provided as maintenance branch versions 5.11.2, 5.12.5, 5.13.2 and 5.20.2. Future software releases will of course already include these patches.
Impact
The vulnerability allows a malicious entity to bypass credential check and escalate privileges.
Affected Product(s)
| Model no. | Product name | Affected versions |
|---|---|---|
| CC612 | Firmware <5.20.2 | |
| CC613 | Firmware <5.20.2 | |
| ICC15xx | Firmware <5.20.2 | |
| ICC16xx | Firmware <5.20.2 |
Vulnerabilities
Expand / Collapse allIn Bender/ebee Charge Controllers in multiple versions are prone to Hardcoded Credentials. Bender charge controller CC612 in version 5.20.1 and below is prone to hardcoded ssh credentials. An attacker may use the password to gain administrative access to the web-UI.
In Bender/ebee Charge Controllers in multiple versions are prone to Command injection via Web interface. An authenticated attacker could enter shell commands into some input fields that are executed with root privileges.
In Bender/ebee Charge Controllers in multiple versions are prone to unprotected data export. Backup export is protected via a random key. The key is set at user login. It is empty after reboot .
In Bender/ebee Charge Controllers in multiple versions are prone to Local privilege Escalation. An authenticated attacker could get root access via the suid applications socat, ip udhcpc and ifplugd.
In Bender/ebee Charge Controllers in multiple versions are prone to an RFID leak. The RFID of the last charge event can be read without authentication via the web interface.
In Bender/ebee Charge Controllers in multiple versions are prone to Cross-site Scripting. An authenticated attacker could write HTML Code into configuration values. These values are not properly escaped when displayed.
In Bender/ebee Charge Controllers in multiple versions a long URL could lead to webserver crash. The URL is used as input of an sprintf to a stack variable.
Mitigation
Restrict network access to the above-mentioned devices.
Remediation
Install latest software update.
Revision History
| Version | Date | Summary |
|---|---|---|
| 1 | 04/26/2022 12:00 | Initial revision. |