Webserver hang via infinite cookie-processing loop
Published Jul 13, 2022 · Updated Sep 17, 2024
Infinite-loop handling in Schneider Electric Modicon communication modules allows remote attackers to hang the webserver via crafted cookies. The embedded webserver mishandles cookie input by entering a loop whose exit condition cannot be reached; Schneider Electric has not disclosed a narrower function or parser locus. No authentication or user interaction is required, and the reported consequence is loss of the modules' web service rather than data access or modification.
Summary
What happened
Infinite-loop handling in Schneider Electric Modicon communication modules allows remote attackers to hang the webserver via crafted cookies. The embedded webserver mishandles cookie input by entering a loop whose exit condition cannot be reached; Schneider Electric has not disclosed a narrower function or parser locus. No authentication or user interaction is required, and the reported consequence is loss of the modules' web service rather than data access or modification.
The record
- CVE
- CVE-2022-34760
- Published
- Jul 13, 2022
- Updated
- Sep 17, 2024
- Vendor
- Schneider Electric
- Product
- BMENOR2200H Advanced RTU Communication Module
- Classifications
- CWE-835, T0814
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 13, 2022CVE publishedPublication date reported by the CVE source.
- Sep 17, 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?
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- Affected versionversion=BMENOR2200H V1.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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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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