Root code execution via unchecked UDP length
Published Dec 5, 2022 · Updated Apr 24, 2025
Buffer overflow in lewei_cam in Force 1 Discovery Wifi U818A HD+ FPV Drone 2.0.10 allows remote attackers to execute root code via UDP. The lewei_cmd_execute function trusts a network-controlled size for command type 4 and reads more than eight bytes into the stack time variable, overwriting the saved return address. Exploitation requires access to the drone camera module's Wi-Fi network; the demonstrated payload runs ARM shellcode and obtains an unrestricted root shell.
Summary
What happened
Buffer overflow in lewei_cam in Force 1 Discovery Wifi U818A HD+ FPV Drone 2.0.10 allows remote attackers to execute root code via UDP. The lewei_cmd_execute function trusts a network-controlled size for command type 4 and reads more than eight bytes into the stack time variable, overwriting the saved return address. Exploitation requires access to the drone camera module's Wi-Fi network; the demonstrated payload runs ARM shellcode and obtains an unrestricted root shell.
The record
- CVE
- CVE-2022-40918
- Published
- Dec 5, 2022
- Updated
- Apr 24, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-787, T1210
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 5, 2022CVE publishedPublication date reported by the CVE source.
- Apr 24, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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.
Public exploit references
- LW9621 lewei_cam command-port stack overflow exploitfunctional · demonstrated
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Technologies
Your stack
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Your stack
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