CVE-2021-34566

WAGO I/O-Check Service prone to Memory Overflow

State: Published
Severity: 9.1 Critical
Published: Nov 9, 2022
Updated: May 1, 2025
Reserved: Jun 10, 2021

Description

In WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to crash the iocheck process and write memory resulting in loss of integrity and DoS.

Scores

CVSS	Score	Vector	Source
3.1	9.1 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H	CERTVDE

Weaknesses

CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Affected Products

Product	Versions
750-81xx/xxx-xxxFWWAGO	FW1 through FW18 Patch 2Affected
750-82xx/xxx-xxxWAGO	FW1 through FW18 Patch 2Affected
752-8303/8000-0002WAGO	FW1 through FW18 Patch 2Affected
762-4xxxWAGO	FW1 through FW18 Patch 2Affected
762-5xxxWAGO	FW1 through FW18 Patch 2Affected
762-6xxxWAGO	FW1 through FW18 Patch 2Affected

References

https://cert.vde.com/en/advisories/VDE-2020-036/

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