Phoenix Contact CHARX SEC-3000 up to 1.6.5 MQTT Message buffer overflow

Summaryinfo

A vulnerability was found in Phoenix Contact CHARX SEC-3150, CHARX SEC-3100, CHARX SEC-3050 and CHARX SEC-3000 up to 1.6.5. It has been classified as critical. The affected element is an unknown function of the component MQTT Message Handler. The manipulation leads to buffer overflow. This vulnerability is traded as CVE-2025-24003. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Phoenix Contact CHARX SEC-3150, CHARX SEC-3100, CHARX SEC-3050 and CHARX SEC-3000 up to 1.6.5. This issue affects an unknown code block of the component MQTT Message Handler. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An unauthenticated remote attacker can use MQTT messages to trigger out-of-bounds writes in charging stations complying with German Calibration Law, resulting in a loss of integrity for only EichrechtAgents and potential denial-of-service for these stations.

The weakness was shared by Jesson Soto Ventura and Matthew Waddell as VDE-2025-014. It is possible to read the advisory at certvde.com. The identification of this vulnerability is CVE-2025-24003 since 01/16/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/08/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Phoenix Contact

Name

• CHARX SEC-3000
• CHARX SEC-3050
• CHARX SEC-3100
• CHARX SEC-3150

Version

• 1.6.0
• 1.6.1
• 1.6.2
• 1.6.3
• 1.6.4
• 1.6.5

License

• commercial

CPE 2.3info

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CPE 2.2info

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