Security Resilience

CVE-2023-45213

Westermo L206-F2G Firmware 4.24

Published
06 February 2024
Modified
21 November 2024
CVSS Score v3.1 6.6
Click a component to see what it means
Raw vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
EPSS Score 0.0037 29th percentile
Risk Priority 48 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-45213 is a medium-severity Permissive Cross-domain Security Policy with Untrusted Domains (CWE-942) vulnerability in Westermo L206-F2G Firmware. Its CVSS base score is 6.6 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Steganography (T1001.002); ranked at the 29th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-4 (Information Flow Enforcement) and SA-11 (Developer Testing and Evaluation) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A02:2025 Security Misconfiguration

EU & UK References

Vulnerability Data

A potential attacker with access to the Westermo Lynx device would be able to execute malicious code that could affect the correct functioning of the device.

CWE(s)
CWE-942CWE-697

Related Threats

MITRE ATT&CK Enterprise Techniques

T1001.002 Steganography Command And Control
Adversaries may use steganographic techniques to hide command and control traffic to make detection efforts more difficult.
attack.mitre.org →
T1003 OS Credential Dumping Credential Access
Adversaries may attempt to dump credentials to obtain account login and credential material, normally in the form of a hash or a clear text password.
attack.mitre.org →
T1003.002 Security Account Manager Credential Access
Adversaries may attempt to extract credential material from the Security Account Manager (SAM) database either through in-memory techniques or through the Windows Registry where the SAM database is stored.
attack.mitre.org →
T1003.005 Cached Domain Credentials Credential Access
Adversaries may attempt to access cached domain credentials used to allow authentication to occur in the event a domain controller is unavailable.
attack.mitre.org →
T1003.006 DCSync Credential Access
Adversaries may attempt to access credentials and other sensitive information by abusing a Windows Domain Controller's application programming interface (API)(Citation: Microsoft DRSR Dec 2017) (Citation: Microsoft GetNCCChanges) (Citati…
attack.mitre.org →
T1003.007 Proc Filesystem Credential Access
Adversaries may gather credentials from the proc filesystem or `/proc`.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-40143Same product: Westermo L206-F2G
CVE-2023-45227Same product: Westermo L206-F2G
CVE-2023-45222Same product: Westermo L206-F2G
CVE-2023-42765Same product: Westermo L206-F2G
CVE-2023-38579Same product: Westermo L206-F2G
CVE-2023-40544Same product: Westermo L206-F2G
CVE-2023-45735Same product: Westermo L206-F2G
CVE-2023-50940Shared CWE-697, CWE-942
CVE-2025-27909Shared CWE-697, CWE-942
CVE-2024-32862Shared CWE-697, CWE-942

Affected Assets

westermo
l206-f2g firmware
4.24

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)
  • V3.4.3
  • V3.4.6
  • V3.5.2

Mitigating Controls (NIST 800-53 r5) AI

AC-4 Information Flow Enforcement good match

Information flow enforcement requires approved authorizations and would reject policies permitting untrusted domains.

SA-11 Developer Testing and Evaluation good match

Developer testing and evaluation directly exercises security-relevant comparisons to discover incorrect logic.

AC-25 Reference Monitor partial match

A reference monitor must be small and correct, structurally limiting the chance of flawed comparison logic in authorization decisions.

SA-8 Security and Privacy Engineering Principles partial match

Security engineering principles require correct implementation of comparison logic used for access and authentication decisions.

SC-7 Boundary Protection partial match

Boundary protection at external interfaces stops unauthorized cross-domain communication allowed by permissive policies.

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.

ID.RA-01 partial match
blocks

Vulnerability identification processes can surface permissive policy misconfigurations.

PR.PS-01 partial match
blocks

Hardened configuration baselines and reviews directly prevent permissive CSP or cross-domain policies.

PR.PS-06 partial match
blocks

Secure SDLC activities include review and testing of web security policies to avoid untrusted domains.

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.5.20 Addressing information security within supplier agreements partial match
removes
A.5.24 Information security incident management planning and preparation partial match
removes
A.8.20 Networks security partial match
degrades

Network security policies can restrict cross-domain communication but do not specifically mandate strict CSP or cross-domain policy configuration.

A.8.21 Security of network services partial match
degrades

Security of network services includes defining allowed endpoints, which can limit untrusted domains but does not directly address web-client policy files.

A.8.23 Web filtering partial match
degrades

Web filtering can block untrusted domains at the network level, partially mitigating permissive cross-domain policies.

A.8.25 Secure development life cycle partial match
blocks

Secure development lifecycle includes code review and testing that can catch incorrect comparison logic.

Hardening callouts derived

DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.

  • No fine-grained STIG row for CWE-697, a pillar-level weakness, and none of its children carries one either.

References