CVE-2023-29105 : What You Need to Know

A vulnerability has been identified in SIMATIC Cloud Connect 7 CC712 and CC716 devices, allowing an attacker to execute a denial of service attack by manipulating the communication between the MQTT broker and the affected device.

Understanding CVE-2023-29105

This CVE pertains to a vulnerability in SIMATIC Cloud Connect 7 CC712 and CC716 devices that could lead to a denial of service attack through the manipulation of MQTT communication.

What is CVE-2023-29105?

CVE-2023-29105 is a vulnerability found in SIMATIC Cloud Connect 7 CC712 and CC716 devices that could be exploited by an attacker to cause a denial of service by interfering with non-JSON MQTT payloads.

The Impact of CVE-2023-29105

The vulnerability poses a medium severity risk with a CVSS base score of 5.9, allowing an attacker to disrupt the communication between MQTT broker and the affected device, resulting in a denial of service scenario.

Technical Details of CVE-2023-29105

This section delves into the technical details of the vulnerability, including the description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises due to the affected device's inability to properly parse a random (non-JSON) MQTT payload, allowing an attacker to exploit this weakness to trigger a denial of service attack.

Affected Systems and Versions

The impacted devices include SIMATIC Cloud Connect 7 CC712 and CC716 with specific versions: All versions >= V2.0 < V2.1 for CC712 and CC716, and All versions < V2.1 for both products.

Exploitation Mechanism

An attacker could exploit this vulnerability by manipulating the communication between the MQTT broker and the affected device, causing a disruption in service.

Mitigation and Prevention

To address CVE-2023-29105, immediate steps need to be taken along with the implementation of long-term security practices and keeping systems up to date with the necessary patches.

Immediate Steps to Take

It is advised to apply vendor-issued patches promptly, monitor MQTT communication for any anomalies, and restrict access to vulnerable devices.

Long-Term Security Practices

Implement strong network segmentation, regularly update firmware, conduct security training for employees, and stay informed about potential vulnerabilities.

Patching and Updates

Keep track of security advisories and updates from Siemens regarding this vulnerability, and apply patches as soon as they are released to mitigate the risk.