Administrative access via loopback authentication bypass
Published Aug 27, 2024 · Updated Aug 27, 2024
Authentication bypass in IPC Diagnostics before 2.0.0.1 on TwinCAT/BSD before 14.1.2.0 allows local users to gain administrative access. Internal Device Manager services on the loopback interface execute administrative HTTP requests without rechecking the Authelia decision enforced by Nginx on external requests. A valid low-privilege account and local SSH access are required; successful exploitation permits deletion and recreation of the Administrator account, enabling PLC reprogramming.
Summary
What happened
Authentication bypass in IPC Diagnostics before 2.0.0.1 on TwinCAT/BSD before 14.1.2.0 allows local users to gain administrative access. Internal Device Manager services on the loopback interface execute administrative HTTP requests without rechecking the Authelia decision enforced by Nginx on external requests. A valid low-privilege account and local SSH access are required; successful exploitation permits deletion and recreation of the Administrator account, enabling PLC reprogramming.
The record
- CVE
- CVE-2024-41173
- Published
- Aug 27, 2024
- Updated
- Aug 27, 2024
- Vendor
- Beckhoff Automation
- Product
- IPC Diagnostics
- Classifications
- CWE-288, T1548
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 27, 2024CVE publishedPublication date reported by the CVE source.
- Aug 27, 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=0 <2.0.0.1
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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