CWE
22
Advisory Published
Updated

CVE-2021-21001: WAGO: PFC200 Access to files outside the home directory

First published: Mon May 24 2021(Updated: )

On WAGO PFC200 devices in different firmware versions with special crafted packets an authorised attacker with network access to the device can access the file system with higher privileges.

Credit: info@cert.vde.com

Affected SoftwareAffected VersionHow to fix
Wago 750-823 Firmware<=fw07
WAGO 750-823
Wago 750-829 Firmware<=fw14
Wago 750-829
Wago 750-831 Firmware<=fw14
WAGO 750-831
Wago 750-832 Firmware<=fw06
WAGO 750-832
Wago 750-852 Firmware<=fw14
WAGO 750-852
Wago 750-862 Firmware<=fw07
WAGO 750-862
Wago 750-880 Firmware<=fw15
WAGO 750-880
Wago 750-881 Firmware<=fw14
WAGO 750-881
Wago 750-882 Firmware<=fw14
WAGO 750-882
Wago 750-885 Firmware<=fw14
WAGO 750-885
Wago 750-889 Firmware<=fw14
WAGO 750-889
Wago 750-890 Firmware<=fw07
WAGO 750-890
Wago 750-891 Firmware<=fw07
WAGO 750-891
Wago 750-893 Firmware<=fw07
Wago 750-893
Wago 750-8202 Firmware<03.06.19_\(18\)
WAGO 750-8202
Wago 750-8203 Firmware<03.06.19_\(18\)
Wago 750-8203
Wago 750-8204 Firmware<03.06.19_\(18\)
Wago 750-8204
Wago 750-8206 Firmware<03.06.19_\(18\)
Wago 750-8206
Wago 750-8207 Firmware<03.06.19_\(18\)
Wago 750-8207
Wago 750-8208 Firmware<03.06.19_\(18\)
Wago 750-8208
Wago 750-8210 Firmware<03.06.19_\(18\)
Wago 750-8210
Wago 750-8211 Firmware<03.06.19_\(18\)
Wago 750-8211
Wago 750-8212 Firmware<03.06.19_\(18\)
Wago 750-8212
Wago 750-8213 Firmware<03.06.19_\(18\)
Wago 750-8213
Wago 750-8214 Firmware<03.06.19_\(18\)
Wago 750-8214
Wago 750-8216 Firmware<03.06.19_\(18\)
Wago 750-8216
Wago 750-8217 Firmware<03.06.19_\(18\)
Wago 750-8217

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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Frequently Asked Questions

  • What is the vulnerability ID for this issue?

    The vulnerability ID for this issue is CVE-2021-21001.

  • What is the severity of CVE-2021-21001?

    The severity of CVE-2021-21001 is critical with a severity value of 6.5.

  • Which devices are affected by CVE-2021-21001?

    WAGO PFC200 devices in different firmware versions are affected by CVE-2021-21001.

  • How can an attacker exploit CVE-2021-21001?

    An authorized attacker with network access to the WAGO PFC200 device can exploit CVE-2021-21001 by using specially crafted packets to access the file system with higher privileges.

  • Is there a fix available for CVE-2021-21001?

    It is recommended to update the firmware of the WAGO PFC200 device to a version that is not vulnerable to CVE-2021-21001.

Contact

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