CVE-2023-48252: Improper Authorization Vulnerability in Bosch Rexroth Nexo Cordless Nutrunner Devices

Vulnerability Summary

• CVE ID: CVE-2023-48252​

• Severity: High (CVSS 3.1 Score: 8.8)​

• Attack Vector: Network​

• Privileges Required: Low​

• User Interaction: None​Nozomi Networks+1NVD+1

• Impact: Allows authenticated remote attackers to perform unauthorized actions via crafted HTTP requests​Bosch PSIRT+3NVD+3CVE+3

Affected Products

How the Exploit Works

CVE-2023-48252 is an improper authorization vulnerability in Bosch Rexroth’s Nexo cordless nutrunner devices. An authenticated remote attacker can send specially crafted HTTP requests to perform actions beyond their authorized access level. This flaw arises due to insufficient access control checks within the device’s web interface, allowing privilege escalation and unauthorized operations.​NVD+3Bosch PSIRT+3Bosch Rexroth Global+3NVD+3Tenable®+3CVE+3

Conceptual Example Code

While specific exploit code is not publicly available, a conceptual example of how an attacker might exploit this vulnerability is as follows:​

In this example, an attacker with low-level credentials sends a POST request to modify device settings that should be restricted to higher-privileged users.​

Potential Risks

• Unauthorized modification of device configurations​

• Execution of privileged operations without proper authorization​

• Potential disruption of device functionality​

• Exposure of sensitive operational data​

Mitigation Recommendations

• Update Firmware: Bosch Rexroth has released NEXO-OS V1500-SP3, which addresses this vulnerability. Users should update their devices to this version promptly.​Nozomi Networks+2Bosch PSIRT+2Bosch Rexroth Global+2

• Network Segmentation: Operate affected devices within protected network segments to limit exposure to potential attackers.​Bosch PSIRT

• Access Controls: Implement strict access control measures, ensuring only authorized personnel can interact with the devices.​

• Monitor Logs: Regularly review device logs for any unauthorized access attempts or unusual activities.​

Conclusion

CVE-2023-48252 highlights the importance of proper authorization mechanisms in industrial devices. By exploiting this vulnerability, attackers can perform unauthorized actions, potentially compromising the integrity and functionality of critical equipment. Timely firmware updates and robust security practices are essential to mitigate such risks.​

References

• NVD – CVE-2023-48252

• Bosch Security Advisory BOSCH-SA-711465

• [Tenable – CVE-2023-48252](https://www.tenable.com/cve/C