Code execution via unbounded secret-file read
Published Dec 22, 2021 · Updated Aug 3, 2024
Stack-based buffer overflow in Garrett Metal Detectors iC Module CMA 5.0 allows attackers to execute code through a malformed secret file. The readfile function copies /ltrx_user/secret byte by byte into checkPassword's 35-byte encrypted_pwd stack buffer without checking its length. Exploitation requires prior control of the secret file; a later CLI authentication attempt triggers stack corruption and program-counter control.
Summary
What happened
Stack-based buffer overflow in Garrett Metal Detectors iC Module CMA 5.0 allows attackers to execute code through a malformed secret file. The readfile function copies /ltrx_user/secret byte by byte into checkPassword's 35-byte encrypted_pwd stack buffer without checking its length. Exploitation requires prior control of the secret file; a later CLI authentication attempt triggers stack corruption and program-counter control.
The record
- CVE
- CVE-2021-21906
- Published
- Dec 22, 2021
- Updated
- Aug 3, 2024
- Vendor
- Garrett Metal Detectors
- Product
- iC Module CMA
- Classifications
- CWE-121
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Dec 22, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 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=Garrett Metal Detectors iC Module CMA Version 5.0
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
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Cisco Talos checkPassword crash demonstrationproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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