CVE-2021-34593

moderate-risk
Published 2021-10-26

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.

Do I need to act?

~
1.6% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (15)

Plcwinnt

Affected Vendors

Wago Codesys

References (8)

Exploit http://packetstormsecurity.com/files/164716/CODESYS-2.4.7.0-Denial-Of-Service.ht...
Exploit http://packetstormsecurity.com/files/165874/WAGO-750-8xxx-PLC-Denial-Of-Service-...
Mailing List http://seclists.org/fulldisclosure/2021/Oct/64
Vendor Advisory https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16877&token=8faab0fc1...
Exploit http://packetstormsecurity.com/files/164716/CODESYS-2.4.7.0-Denial-Of-Service.ht...
Exploit http://packetstormsecurity.com/files/165874/WAGO-750-8xxx-PLC-Denial-Of-Service-...
Mailing List http://seclists.org/fulldisclosure/2021/Oct/64
Vendor Advisory https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16877&token=8faab0fc1...
48
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 4/34 · Minimal
Exposure 18/34 · Moderate