Cyber Resilience

CVE-2023-27408

Siemens Scalance Lpe9403 Firmware ≤ 2.1

Published
09 May 2023
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 3.3
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS Score 0.0017 7th percentile
Risk Priority 28 floored blend · peak EPSS

Summary

CVE-2023-27408 is a low-severity Creation of Temporary File With Insecure Permissions (CWE-378) vulnerability in Siemens Scalance Lpe9403 Firmware. Its CVSS base score is 3.3 (Low).

Operationally, exploitation aligns with the MITRE ATT&CK technique Data from Local System (T1005); ranked at the 7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability Data

A vulnerability has been identified in SCALANCE LPE9403 (All versions < V2.1). The `i2c` mutex file is created with the permissions bits of `-rw-rw-rw-`. This file is used as a mutex for multiple applications interacting with i2c. This could allow…

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an authenticated attacker with access to the SSH interface on the affected device to interfere with the integrity of the mutex and the data it protects.

CWE(s)
CWE-378

Related Threats

MITRE ATT&CK Enterprise Techniques

T1005 Data from Local System Collection
Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.
attack.mitre.org →
T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1552 Unsecured Credentials Credential Access
Adversaries may search compromised systems to find and obtain insecurely stored credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-40573Same product: Siemens Scalance Lpe9403
CVE-2023-27410Same product: Siemens Scalance Lpe9403
CVE-2025-40578Same product: Siemens Scalance Lpe9403
CVE-2025-40577Same product: Siemens Scalance Lpe9403
CVE-2025-40580Same product: Siemens Scalance Lpe9403
CVE-2025-40579Same product: Siemens Scalance Lpe9403
CVE-2023-27407Same product: Siemens Scalance Lpe9403
CVE-2025-40574Same product: Siemens Scalance Lpe9403
CVE-2025-40572Same product: Siemens Scalance Lpe9403
CVE-2025-27393Same product: Siemens Scalance Lpe9403

Affected Assets

siemens
scalance lpe9403 firmware
≤ 2.1

Mitigating Controls

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.PS-06 mostly match
prevents

Secure SDLC practices directly require proper temporary-file creation and permission handling.

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.8.28 Secure coding mostly match
prevents

Secure coding standards directly prohibit insecure temporary file creation and permissions.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect insecure temporary files but does not prevent their creation.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC mandates secure handling of temporary files and permissions.

A.8.26 Application security requirements partial match
prevents

Application security requirements include secure creation and permissioning of temporary files.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles require least-privilege file creation and access controls.

A.8.3 Information access restriction partial match
prevents

Information access restriction can limit exposure but does not address file creation itself.

References