CVE-2021-34593 - Improper Handling of Exceptional Conditions

Severity

75%

Complexity

39%

Confidentiality

60%

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 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P).

Overview

First reported 3 years ago

2021-10-26 10:15:00

Last updated 3 years ago

2021-11-23 20:04:00

Affected Software

CODESYS PLCWinNT

Codesys Runtime Toolkit on X86

References

https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16877&token=8faab0fc1e069f4edfca5d5aba8146139f67a175&download=

https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16877&token=8faab0fc1e069f4edfca5d5aba8146139f67a175&download=

Vendor Advisory

20211029 SEC Consult SA-20211028-0 :: Denial of Service in CODESYS V2

http://packetstormsecurity.com/files/164716/CODESYS-2.4.7.0-Denial-Of-Service.html

20211029 SEC Consult SA-20211028-0 :: Denial of Service in CODESYS V2

Mailing List, Third Party Advisory

http://packetstormsecurity.com/files/164716/CODESYS-2.4.7.0-Denial-Of-Service.html

Third Party Advisory, VDB Entry

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