CVE-2021-34593
CODESYS V2 runtime: unauthenticated invalid requests may result in denial-of-service
HIGH 7.5EPSS 2.7%
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.
- Affected
- CODESYS · CODESYS V2
- CVSS v3.1 NVD
- 7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS v2.0 NVD
- 5.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P - EPSS
- 2.66% chance of exploitation in the next 30 days, 85th percentile
- Published
- 2021-10-26
- Updated
- 2024-09-17
Proof-of-concept exploits (2)
- http://packetstormsecurity.com/files/164716/CODESYS-2.4.7.0-Denial-Of-Service.html
- http://packetstormsecurity.com/files/165874/WAGO-750-8xxx-PLC-Denial-Of-Service-User-Enum…
Security advisories
- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16877&token=8faab0fc1e069f4edf…
- http://seclists.org/fulldisclosure/2021/Oct/64