Cyber Resilience

CVE-2023-3663

Codesys Development System 3.5.11.20 – 3.5.19.20

Published
03 August 2023
Modified
21 November 2024
CVSS Score v3.1 8.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.010 60th percentile
Risk Priority 66 floored blend · peak EPSS

Summary

CVE-2023-3663 is a high-severity Improper Verification of Source of a Communication Channel (CWE-940) vulnerability in Codesys Development System. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique ARP Cache Poisoning (T1557.002); ranked in the top 40% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A07:2025 Authentication Failures

EU & UK References

Vulnerability Data

In CODESYS Development System versions from 3.5.11.20 and before 3.5.19.20 a missing integrity check might allow an unauthenticated remote attacker to manipulate the content of notifications received via HTTP by the CODESYS notification server.

CWE(s)
CWE-940

Related Threats

MITRE ATT&CK Enterprise Techniques

T1557.002 ARP Cache Poisoning Credential Access
Adversaries may poison Address Resolution Protocol (ARP) caches to position themselves between the communication of two or more networked devices.
attack.mitre.org →
T1557 Adversary-in-the-Middle Credential Access
Adversaries may attempt to position themselves between two or more networked devices using an adversary-in-the-middle (AiTM) technique to support follow-on behaviors such as [Network Sniffing](https://attack.
attack.mitre.org →
T1557.001 Name Resolution Poisoning and SMB Relay Credential Access
By responding to LLMNR/NBT-NS/mDNS network traffic, adversaries may spoof an authoritative source for name resolution to force communication with an adversary controlled system.
attack.mitre.org →
T1557.003 DHCP Spoofing Credential Access
Adversaries may redirect network traffic to adversary-owned systems by spoofing Dynamic Host Configuration Protocol (DHCP) traffic and acting as a malicious DHCP server on the victim network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-44468Same product: Codesys Development System
CVE-2023-3669Same product: Codesys Development System
CVE-2026-44469Same product: Codesys Development System
CVE-2023-3662Same product: Codesys Development System
CVE-2023-3670Same product: Codesys Development System
CVE-2025-40820Shared CWE-940
CVE-2025-23019Shared CWE-940
CVE-2025-13086Shared CWE-940
CVE-2025-42978Shared CWE-940
CVE-2024-40503Shared CWE-940

Affected Assets

codesys
development system
3.5.11.20 — 3.5.19.20

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V3.5.3
  • V10.6.2
  • V15.2.4

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

IA-9 Service Identification and Authentication
addresses: CWE-940

Enforces verification of the source of a communication channel by requiring identification and authentication of services first.

SC-11 Trusted Path
addresses: CWE-940

Requires explicit verification of the source and integrity of the channel used for authentication and other security functions.

SC-20 Secure Name/Address Resolution Service (Authoritative Source)
addresses: CWE-940

Provides the means to verify the source of name-resolution responses instead of relying on unauthenticated channels.

SC-23 Session Authenticity
addresses: CWE-940

Requires explicit verification of the communication source, blocking session hijacking via spoofed or alternate channels.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-03 full match
prevents

Authentication of users/services/hardware directly enforces source verification for communication channels.

PR.AA-04 mostly match
prevents

Verifying identity assertions prevents spoofed channel origins but does not cover all channel-establishment scenarios.

PR.IR-01 partial match
prevents

Network protections reduce unauthorized channel usage but do not specifically require origin verification at channel setup.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.5 Secure authentication mostly match
prevents

Secure authentication mechanisms verify the identity and origin of communication channel initiators.

A.8.20 Networks security partial match
degrades

Network security controls enforce source verification and channel authentication for incoming communications.

A.8.21 Security of network services partial match
degrades

Security of network services includes validating the origin of service requests and connections.

A.8.22 Segregation of networks partial match
mitigates

Network segregation limits exposure but does not directly verify source of individual channels.

A.8.24 Use of cryptography partial match
prevents

Cryptography can support channel authentication but does not inherently verify source without proper implementation.

A.8.26 Application security requirements partial match
prevents

Application security requirements may specify origin checks but do not mandate them.

References