CODESYS V2 runtime: unauthenticated invalid requests may result in denial-of-service
CVE-2021-34593

7.5HIGH

Key Information:

Vendor

Codesys

Status
Codesys V2
Vendor
CVE Published:
26 October 2021

What is 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. Running PLC programs may be stopped, memory may be leaked, or further communication clients may be blocked from accessing the PLC.

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Deploy the Patch

Affected Version(s)

CODESYS V2 Runtime Toolkit 32 bit full

CODESYS V2 PLCWinNT

References

https://customers.codesys.com/index.php?eID=dumpFile&t=f&...
x_refsource_CONFIRM
http://seclists.org/fulldisclosure/2021/Oct/64
mailing-listx_refsource_FULLDISC
http://packetstormsecurity.com/files/164716/CODESYS-2.4.7...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was discovered by Steffen Robertz and Gerhard Hechenberger from the SEC Consult Vulnerability Lab.
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