CODESYS V2 runtime: out-of-bounds read or write access may result in denial-of-service
CVE-2021-34595

8.1HIGH

Key Information:

Vendor

Codesys

Status
Codesys V2
Vendor
CVE Published:
26 October 2021

What is CVE-2021-34595?

A crafted request with invalid offsets may cause an out-of-bounds read or write access in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition or local memory overwrite.

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

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was reported by Chen Jie and Gao Jian of NSFOCUS.
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