Security 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 6th percentile
Risk Priority 28 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-2023-27408 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 NTDS (T1003.003); ranked at the 6th 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…

more

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

T1003.003 NTDS Credential Access
Adversaries may attempt to access or create a copy of the Active Directory domain database in order to steal credential information, as well as obtain other information about domain members such as devices, users, and access rights.
attack.mitre.org →
T1003.004 LSA Secrets Credential Access
Adversaries with SYSTEM access to a host may attempt to access Local Security Authority (LSA) secrets, which can contain a variety of different credential materials, such as credentials for service accounts.
attack.mitre.org →
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 →
T1012 Query Registry Discovery
Adversaries may interact with the Windows Registry to gather information about the system, configuration, and installed software.
attack.mitre.org →
T1016.001 Internet Connection Discovery Discovery
Adversaries may check for Internet connectivity on compromised systems.
attack.mitre.org →
T1021 Remote Services Lateral Movement
Adversaries may use [Valid Accounts](https://attack.
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-2025-40579Same product: Siemens Scalance Lpe9403
CVE-2025-40580Same product: Siemens Scalance Lpe9403
CVE-2025-27392Same product: Siemens Scalance Lpe9403
CVE-2025-27398Same product: Siemens Scalance Lpe9403
CVE-2025-40582Same product: Siemens Scalance Lpe9403
CVE-2025-27396Same 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 partial match
blocks

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.8.19 Installation of software on operational systems partial match
removes
A.8.25 Secure development life cycle partial match
blocks

Secure SDLC mandates secure handling of temporary files and permissions.

A.8.26 Application security requirements partial match
blocks

A.8.26 only requires that security requirements (including resilience against attacks such as buffer overflows or SQL injection) be identified and specified during development or acquisition; it does not itself enforce, implement, or prevent insecure temporary file permissions from being exploitable.

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

A.8.27 mandates security-by-design principles (least privilege, default-deny, hardening, secure-by-default) plus design reviews that can catch and block insecure temporary-file permissions during architecture and engineering, but this is only one minority slice of CWE-378's surface (many instances arise from ad-hoc runtime file creation outside any reviewed design or outsourced development).

A.8.28 Secure coding partial match
prevents

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

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

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

References