CVE-2021-20996: WAGO: Managed Switches: Unsecure Cookie settings

Published May 13, 2021

Updated

In multiple managed switches by WAGO in different versions special crafted requests can lead to cookies being transferred to third parties.

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 CVE-2021-20996?

CVE-2021-20996 is a vulnerability found in multiple managed switches by WAGO, where specially crafted requests can lead to cookies being transferred to third parties.

Which WAGO managed switches are affected by CVE-2021-20996?

The Wago 0852-0303, 0852-1305, 0852-1505, 0852-1305/000-001, and 0852-1505/000-001 managed switches are affected by CVE-2021-20996.

What is the severity of CVE-2021-20996?

The severity of CVE-2021-20996 is medium, with a severity value of 5.3.

How can CVE-2021-20996 be exploited?

CVE-2021-20996 can be exploited by sending specially crafted requests to the affected WAGO managed switches, which can lead to cookies being transferred to third parties.

Is there a fix for CVE-2021-20996?

At the moment, there is no fix available for CVE-2021-20996. It is recommended to follow any recommendations provided by the vendor or security advisories.