high
7.5
CWE
770
Advisory Published
Updated

CVE-2021-21000: WAGO: PFC200 Denial of Service due to the number of connections to the runtime

First published: Mon May 24 2021(Updated: )

On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker with network access to the device could cause a denial of service for the login service of the runtime.

Credit: info@cert.vde.com

Affected SoftwareAffected VersionHow to fix
WAGO 750-823 firmware<=fw07
WAGO 750-823 firmware
WAGO 750-829 firmware<=fw14
WAGO 750-829 firmware
WAGO Ethernet Firmware<=fw14
WAGO 750-831 firmware
WAGO 750-832/000-002 firmware<=fw06
WAGO 750-xxx series firmware
WAGO 750-852 firmware<=fw14
WAGO 750-xxx series firmware
WAGO 750-862 firmware<=fw07
WAGO 750-xxx series firmware
WAGO 750-880/040-000 firmware<=fw15
WAGO 750-880/040-000
WAGO Ethernet Firmware<=fw14
WAGO 750-881 firmware
WAGO 750-882 firmware<=fw14
WAGO 750-882 firmware
WAGO 750-885 firmware<=fw14
WAGO 750-885 firmware
WAGO 750-889 firmware<=fw14
WAGO 750-889 firmware
WAGO 750-890 Firmware<=fw07
WAGO 750-890 firmware
WAGO 750-891 firmware<=fw07
WAGO 750-891 firmware
WAGO Ethernet Firmware<=fw07
WAGO 750-893 firmware
WAGO 750-8202/025-002 Firmware<03.06.19_\(18\)
WAGO 750-8202 Firmware
WAGO Ethernet Firmware<03.06.19_\(18\)
WAGO 750-8203 firmware
WAGO 750-8204 firmware<03.06.19_\(18\)
WAGO 750-8204/025-000
WAGO 750-8206 firmware<03.06.19_\(18\)
WAGO 750-xxx series firmware
WAGO 750-8207 firmware<03.06.19_\(18\)
WAGO 750-8207/025-000
WAGO 750-8208/025-001 firmware<03.06.19_\(18\)
WAGO 750-xxx series firmware
WAGO 750-8210/040-000 firmware<03.06.19_\(18\)
WAGO 750-8210 firmware
WAGO 750-8211/040-001 firmware<03.06.19_\(18\)
WAGO 750-8211/040-000
WAGO 750-8212/025-002 firmware<03.06.19_\(18\)
Cisco 8212
WAGO 750-8213/040-010 firmware<03.06.19_\(18\)
WAGO 750-8213/040-010
WAGO 750-8214 firmware<03.06.19_\(18\)
WAGO 750-8214 firmware
WAGO 750-8216 firmware<03.06.19_\(18\)
WAGO 750-8216/040-000
WAGO 750-8217 firmware<03.06.19_\(18\)
WAGO 750-8217 firmware

Remedy

WAGO recommends all effected users with CODESYS 2.3 Runtime PLCs to update to the firmware versions listed at https://cert.vde.com/en-us/advisories/vde-2021-014 in the solution paragraph.

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID for this issue?

    The vulnerability ID for this issue is CVE-2021-21000.

  • What is the severity level of CVE-2021-21000?

    CVE-2021-21000 has a severity level of 7.5 (High).

  • Which devices are affected by CVE-2021-21000?

    WAGO PFC200 devices with different firmware versions are affected by CVE-2021-21000.

  • How can an attacker exploit this vulnerability?

    An attacker with network access to the device can cause a denial of service for the login service of the runtime by sending specially crafted packets.

  • Is there a fix available for CVE-2021-21000?

    At the moment, there is no information available about a fix for CVE-2021-21000. Please refer to the provided reference for updates.

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