VulnerabilityAnalyzed
CVE-2021-34593
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.
HIGH 7.5EPSS 2.74%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.74%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.74% probability · 85th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-755
- Affected
- wago/750-8202 firmware · wago/750-8203 firmware · wago/750-8204 firmware · wago/750-8206 firmware · wago/750-8207 firmware · wago/750-8208 firmware · wago/750-8210 firmware · wago/750-8211 firmware · wago/750-8212 firmware · wago/750-8213 firmware · wago/750-8214 firmware · wago/750-8216 firmware · wago/750-8217 firmware · codesys/plcwinnt · codesys/runtime toolkit
- Source
- info@cert.vde.com
References
- http://packetstormsecurity.com/files/164716/CODESYS-2.4.7.0-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/165874/WAGO-750-8xxx-PLC-Denial-Of-Service-User-Enumeration.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2021/Oct/64Mailing List, Third Party Advisory
- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16877&token=8faab0fc1e069f4edfca5d5aba8146139f67a175&download=Vendor Advisory
- http://packetstormsecurity.com/files/164716/CODESYS-2.4.7.0-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/165874/WAGO-750-8xxx-PLC-Denial-Of-Service-User-Enumeration.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2021/Oct/64Mailing List, Third Party Advisory
- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16877&token=8faab0fc1e069f4edfca5d5aba8146139f67a175&download=Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.