Network-isolation bypass via incorrect SSH default
Published Jul 11, 2023 · Updated Nov 12, 2024
Incorrect SSH defaults in Siemens SIMATIC CN 4100 before 2.5 allow remote authenticated users to bypass network isolation. Siemens identifies an incorrect SSH configuration default but does not disclose the affected parameter, its value, or how SSH traffic defeats the isolation boundary. Successful use requires low-privileged access to the network-reachable service and can expose resources across an intended segmentation boundary.
Summary
What happened
Incorrect SSH defaults in Siemens SIMATIC CN 4100 before 2.5 allow remote authenticated users to bypass network isolation. Siemens identifies an incorrect SSH configuration default but does not disclose the affected parameter, its value, or how SSH traffic defeats the isolation boundary. Successful use requires low-privileged access to the network-reachable service and can expose resources across an intended segmentation boundary.
The record
- CVE
- CVE-2023-29131
- Published
- Jul 11, 2023
- Updated
- Nov 12, 2024
- Vendor
- Siemens
- Product
- SIMATIC CN 4100
- Classifications
- CWE-276
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 11, 2023CVE publishedPublication date reported by the CVE source.
- Nov 12, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=All versions < V2.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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