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CVE-2023-37557

CODESYS Heap-based Buffer Overflow in multiple products

MEDIUM
6.5
CVSS Score
Published: August 3, 2023 at 11:06 AM UTC
Updated: June 17, 2026 at 06:08 AM UTC
19 products affected across 1 vendorControl for emPC-A/iMX6 SLControl for BeagleBone SLControl for PFC100 SL

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

After successful authentication as a user in multiple Codesys products in multiple versions, specific crafted remote communication requests can cause the CmpAppBP component to overwrite a heap-based buffer, which can lead to a denial-of-service condition.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Control for BeagleBone SL· Codesys
95%
v < 4.10.0.0v < V4.10.0.0
Affected range stops below 4.10.0.0, so it looks safe — our inference, not a vendor statement
Affected range stops below V4.10.0.0, so it looks safe — our inference, not a vendor statement
Control for emPC-A/iMX6 SL· Codesys
95%
v < 4.10.0.0v < V4.10.0.0
Affected range stops below 4.10.0.0, so it looks safe — our inference, not a vendor statement
Affected range stops below V4.10.0.0, so it looks safe — our inference, not a vendor statement
Control for IOT2000 SL· Codesys
95%
v < 4.10.0.0v < V4.10.0.0
Affected range stops below 4.10.0.0, so it looks safe — our inference, not a vendor statement
Affected range stops below V4.10.0.0, so it looks safe — our inference, not a vendor statement
Control for Linux SL· Codesys
95%
v < 4.10.0.0v < V4.10.0.0
Affected range stops below 4.10.0.0, so it looks safe — our inference, not a vendor statement
Affected range stops below V4.10.0.0, so it looks safe — our inference, not a vendor statement
Control for PFC100 SL· Codesys
95%
v < 4.10.0.0v < V4.10.0.0
Affected range stops below 4.10.0.0, so it looks safe — our inference, not a vendor statement
Affected range stops below V4.10.0.0, so it looks safe — our inference, not a vendor statement
Control for PFC200 SL· Codesys
95%
v < 4.10.0.0v < V4.10.0.0
Affected range stops below 4.10.0.0, so it looks safe — our inference, not a vendor statement
Affected range stops below V4.10.0.0, so it looks safe — our inference, not a vendor statement
Control for PLCnext SL· Codesys
95%
v < 4.10.0.0v < V4.10.0.0
Affected range stops below 4.10.0.0, so it looks safe — our inference, not a vendor statement
Affected range stops below V4.10.0.0, so it looks safe — our inference, not a vendor statement
Control for Raspberry Pi SL· Codesys
95%
v < 4.10.0.0v < V4.10.0.0
Affected range stops below 4.10.0.0, so it looks safe — our inference, not a vendor statement
Affected range stops below V4.10.0.0, so it looks safe — our inference, not a vendor statement
Control for WAGO Touch Panels 600 SL· Codesys
95%
v < 4.10.0.0v < V4.10.0.0
Affected range stops below 4.10.0.0, so it looks safe — our inference, not a vendor statement
Affected range stops below V4.10.0.0, so it looks safe — our inference, not a vendor statement
Control RTE (SL)· Codesys
95%
v < 3.5.19.20v < V3.5.19.20
Affected range stops below 3.5.19.20, so it looks safe — our inference, not a vendor statement
Affected range stops below V3.5.19.20, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Third Party Advisory
Source: [email protected]
https://cert.vde.com/en/advisories/VDE-2023-019/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMCERTVDE
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787

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