CVE-2021-20997: WAGO: Managed Switches: Unauthorized access to password hashes

Published May 13, 2021

Updated

In multiple managed switches by WAGO in different versions it is possible to read out the password hashes of all Web-based Management users.

Affected Software

10 affected components

WAGO 0852-0303 Firmware<=1.2.3.s0

WAGO 0852-0303

WAGO 0852-1305 Firmware<=1.1.7.s0

WAGO 0852-1305

WAGO 0852-1505 Firmware<=1.1.6.s0

WAGO 0852-1505

WAGO 0852-1305\/000-001 Firmware<=1.0.4.s0

WAGO 0852-1305\/000-001

WAGO 0852-1505\/000-001 Firmware<=1.0.4.s0

WAGO 0852-1505\/000-001

Remediation

Information

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]

Event History

May 13, 2021

CVE Published

via MITRE·01:45 PM

Data Sourced

via MITRE·01:45 PM

RemedyDescriptionSeverityWeakness

Frequently Asked Questions

What is the vulnerability ID of this vulnerability?

The vulnerability ID of this vulnerability is CVE-2021-20997.

What is the severity of CVE-2021-20997?

The severity of CVE-2021-20997 is high (7.5).

Which software versions are affected by CVE-2021-20997?

The software versions affected by CVE-2021-20997 are Wago 0852-0303 Firmware (up to version 1.2.3.s0), Wago 0852-1305 Firmware (up to version 1.1.7.s0), Wago 0852-1505 Firmware (up to version 1.1.6.s0), Wago 0852-1305/000-001 Firmware (up to version 1.0.4.s0), and Wago 0852-1505/000-001 Firmware (up to version 1.0.4.s0).

What is the description of CVE-2021-20997?

The description of CVE-2021-20997 is that in multiple managed switches by WAGO in different versions, it is possible to read out the password hashes of all Web-based Management users.

How can CVE-2021-20997 be fixed?

To fix CVE-2021-20997, it is recommended to apply the latest firmware update provided by WAGO and follow any additional recommendations or patches provided by the vendor.