Siemens SCALANCE LPE9403 up to 3.x Log path traversal

Summaryinfo

A vulnerability was found in Siemens SCALANCE LPE9403 up to 3.x. It has been rated as critical. Affected is an unknown function of the component Log Handler. The manipulation leads to path traversal. This vulnerability is listed as CVE-2025-27397. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Siemens SCALANCE LPE9403 up to 3.x. This issue affects an unknown function of the component Log Handler. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability has been identified in SCALANCE LPE9403 (6GK5998-3GS00-2AC2) (All versions < V4.0). Affected devices do not properly limit user controlled paths to which logs are written and from where they are read. This could allow an authenticated highly-privileged remote attacker to read and write arbitrary files in the filesystem, if and only if the malicious path ends with 'log' .

It is possible to read the advisory at cert-portal.siemens.com. The identification of this vulnerability is CVE-2025-27397 since 02/24/2025. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are necessary for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 4.0 eliminates this vulnerability.

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Productinfo

Vendor

• Siemens

Name

• SCALANCE LPE9403

Version

• 3.x

License

• commercial

Website

• Vendor: https://www.siemens.com/

CPE 2.3info

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CPE 2.2info

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