A vulnerability was found in WAGO PFC100 and PFC200 (affected version not known). It has been rated as problematic. This issue affects the function crypt of the component WBM Web Application. The manipulation with an unknown input leads to a information exposure vulnerability (Hash). Using CWE to declare the problem leads to CWE-203. The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not. Impacted is confidentiality. The summary by CVE is:

An exploitable timing discrepancy vulnerability exists in the authentication functionality of the Web-Based Management (WBM) web application on WAGO PFC100/200 controllers. The WBM application makes use of the PHP crypt() function which can be exploited to disclose hashed user credentials. This affects WAGO PFC200 Firmware version 03.00.39(12) and version 03.01.07(13), and WAGO PFC100 Firmware version 03.00.39(12).

The weakness was disclosed 03/11/2020. The identification of this vulnerability is CVE-2019-5135 since 01/04/2019. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

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

The entries VDB-151308 and VDB-151306 are pretty similar.

Productinfo

Vendor

• WAGO

Name

• PFC100
• PFC200

License

• commercial

CPE 2.3info

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• 🔍

CPE 2.2info

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• 🔍

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