CVE-2021-21000: WAGO: PFC200 Denial of Service due to the number of connections to the runtime
Published 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.
Affected Software
108 affected components
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
All of the following
WAGO 750-823 Firmware<fw08
WAGO 750-823
All of the following
WAGO 750-829 Firmware<fw15
WAGO 750-829
All of the following
WAGO 750-831 Firmware<fw15
WAGO 750-831
All of the following
WAGO 750-832 Firmware<fw08
WAGO 750-832
All of the following
WAGO 750-852 Firmware<fw15
WAGO 750-852
All of the following
WAGO 750-862 Firmware<fw08
WAGO 750-862
All of the following
WAGO 750-880 Firmware<fw16
WAGO 750-880
All of the following
WAGO 750-881 Firmware<fw15
WAGO 750-881
All of the following
WAGO 750-882 Firmware<fw15
WAGO 750-882
All of the following
WAGO 750-885 Firmware<fw15
WAGO 750-885
All of the following
WAGO 750-889 Firmware<fw15
WAGO 750-889
All of the following
WAGO 750-890 Firmware<fw08
WAGO 750-890
All of the following
WAGO 750-891 Firmware<fw08
WAGO 750-891
All of the following
WAGO 750-893 Firmware<fw08
WAGO 750-893
All of the following
WAGO 750-8202 Firmware<03.06.19_\(18\)
WAGO 750-8202
All of the following
WAGO 750-8203 Firmware<03.06.19_\(18\)
WAGO 750-8203
All of the following
WAGO 750-8204 Firmware<03.06.19_\(18\)
WAGO 750-8204
All of the following
WAGO 750-8206 Firmware<03.06.19_\(18\)
WAGO 750-8206
All of the following
WAGO 750-8207 Firmware<03.06.19_\(18\)
WAGO 750-8207
All of the following
WAGO 750-8208 Firmware<03.06.19_\(18\)
WAGO 750-8208
All of the following
WAGO 750-8210 Firmware<03.06.19_\(18\)
WAGO 750-8210
All of the following
WAGO 750-8211 Firmware<03.06.19_\(18\)
WAGO 750-8211
All of the following
WAGO 750-8212 Firmware<03.06.19_\(18\)
WAGO 750-8212
All of the following
WAGO 750-8213 Firmware<03.06.19_\(18\)
WAGO 750-8213
All of the following
WAGO 750-8214 Firmware<03.06.19_\(18\)
WAGO 750-8214
All of the following
WAGO 750-8216 Firmware<03.06.19_\(18\)
WAGO 750-8216
All of the following
WAGO 750-8217 Firmware<03.06.19_\(18\)
WAGO 750-8217
Remediation
Information
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.
Event History
May 24, 2021
CVE Published
via MITRE·11:05 AM
Data Sourced
via MITRE·11:05 AM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·11:15 AM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-21000.
2
What is the severity level of CVE-2021-21000?
CVE-2021-21000 has a severity level of 7.5 (High).
3
Which devices are affected by CVE-2021-21000?
WAGO PFC200 devices with different firmware versions are affected by CVE-2021-21000.
4
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.
5
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.