Vulnerability Description
In CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56 unauthenticated crafted invalid requests may result in several denial-of-service conditions. Running PLC programs may be stopped, memory may be leaked, or further communication clients may be blocked from accessing the PLC.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Wago | 750-8202 Firmware | < fw20 |
| Wago | 750-8202 | - |
| Wago | 750-8203 Firmware | < fw20 |
| Wago | 750-8203 | - |
| Wago | 750-8204 Firmware | < fw20 |
| Wago | 750-8204 | - |
| Wago | 750-8206 Firmware | < fw20 |
| Wago | 750-8206 | - |
| Wago | 750-8207 Firmware | < fw20 |
| Wago | 750-8207 | - |
| Wago | 750-8208 Firmware | < fw20 |
| Wago | 750-8208 | - |
| Wago | 750-8210 Firmware | < fw20 |
| Wago | 750-8210 | - |
| Wago | 750-8211 Firmware | < fw20 |
| Wago | 750-8211 | - |
| Wago | 750-8212 Firmware | < fw20 |
| Wago | 750-8212 | - |
| Wago | 750-8213 Firmware | < fw20 |
| Wago | 750-8213 | - |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/164716/CODESYS-2.4.7.0-Denial-Of-Service.htExploitThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/165874/WAGO-750-8xxx-PLC-Denial-Of-Service-ExploitThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2021/Oct/64Mailing ListThird Party Advisory
- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16877&token=8faab0fc1Vendor Advisory
- http://packetstormsecurity.com/files/164716/CODESYS-2.4.7.0-Denial-Of-Service.htExploitThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/165874/WAGO-750-8xxx-PLC-Denial-Of-Service-ExploitThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2021/Oct/64Mailing ListThird Party Advisory
- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16877&token=8faab0fc1Vendor Advisory
FAQ
What is CVE-2021-34593?
CVE-2021-34593 is a vulnerability with a CVSS score of 7.5 (HIGH). In CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56 unauthenticated crafted invalid requests may result in several denial-of-service conditions. Running PLC programs may...
How severe is CVE-2021-34593?
CVE-2021-34593 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-34593?
Check the references section above for vendor advisories and patch information. Affected products include: Wago 750-8202 Firmware, Wago 750-8202, Wago 750-8203 Firmware, Wago 750-8203, Wago 750-8204 Firmware.