Vulnerability-Lookup

VAR-202110-1143

Vulnerability from variot - Updated: 2025-08-16 23:19

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. CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT contains a vulnerability related to the use of out-of-bounds pointer offsets.Information is tampered with and service operation is interrupted (DoS) It may be in a state

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CVE-2021-34595 (GCVE-0-2021-34595)

Vulnerability from cvelistv5 – Published: 2021-10-26 09:55 – Updated: 2024-09-17 03:42

Title

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

Summary

Severity ?

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CWE

CWE-823 - Use of Out-of-range Pointer Offset

Assigner

CERTVDE

References

URL

Tags

https://customers.codesys.com/index.php?eID=dumpF…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	CODESYS	CODESYS V2	Affected: Runtime Toolkit 32 bit full , < V2.4.7.56 (custom) Affected: PLCWinNT , < V2.4.7.56 (custom)

Credits

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

Show details on NVD website

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

VAR-202110-1143

CVE-2021-34595 (GCVE-0-2021-34595)

Tags

Sightings

Nomenclature