Unauthorized firmware loading via attacker-controlled file path
Published Jul 13, 2022 · Updated Sep 16, 2024
External file-path control in Schneider Electric Modicon communication modules allows remote authenticated users to load unauthorized firmware. The firmware-image handler writes user-controlled data to a file path that the device later accepts for loading, without restricting it to an authorized image. Exploitation requires network access and privileged installer credentials; chained flaws can overwrite firmware, backdoor the module, or brick it permanently.
Summary
What happened
External file-path control in Schneider Electric Modicon communication modules allows remote authenticated users to load unauthorized firmware. The firmware-image handler writes user-controlled data to a file path that the device later accepts for loading, without restricting it to an authorized image. Exploitation requires network access and privileged installer credentials; chained flaws can overwrite firmware, backdoor the module, or brick it permanently.
The record
- CVE
- CVE-2022-34765
- Published
- Jul 13, 2022
- Updated
- Sep 16, 2024
- Vendor
- Schneider Electric
- Product
- BMENOR2200H Advanced RTU Communication Module
- Classifications
- CWE-73, T1495
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Jul 13, 2022CVE publishedPublication date reported by the CVE source.
- Sep 16, 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=V2.01 <BMENOR2200H*
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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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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