CVE-2021-20997

WAGO: Managed Switches: Unauthorized access to password hashes

Published May 13, 2021 CVSS 3.1 · 7.5 High EPSS 1.0% KEV · Not listed
Description
In multiple managed switches by WAGO in different versions it is possible to read out the password hashes of all Web-based Management users.

Remediation

Vendor Solution

The Web-Based Management is only needed during installation and commissioning, not during normal operations. It is recommended to disable the web server after commissioning. The Command Line Interface (CLI) is an alternative for commissioning the device. This is the easiest and securest way to protect your device from the listed vulnerabilities. Regardless of the action described above, the vulnerabilities are fixed with following firmware releases: Item number [FW version] 0852-0303 (HW < 3)* [V1.2.5.S0] Detailed information about the hardware version is described in the installation guide. 0852-0303 (HW >=3)* [V1.2.3.S1] Detailed information about the hardware version is described in the installation guide. 0852-1305 [V1.1.8.S0] 0852-1505 [V1.1.7.S0] 0852-1305/000-001 [V1.1.4.S0] 0852-1505/000-001 [V1.1.4.S0]


Vendor Workaround

Disable the web server of the device. Use the CLI interface of the device. Update to the latest firmware. Restrict network access to the device. Do not directly connect the device to the internet.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-8406 In multiple managed switches by WAGO in different versions it is possible to read out the password hashes of all Web-based Management users.
History

No history.