Arbitrary firmware execution via unsigned HTTP update
Published Apr 17, 2023 · Updated Feb 6, 2025
Firmware update validation in Electra Air OSK201 allows physically proximate attackers to install arbitrary firmware over a malicious Wi-Fi network. The OTA handler accepts an MQTT update command, downloads firmware over HTTP, checks only its supplied MD5 value, and flashes it without signature verification. Exploitation requires an unprovisioned revision 007 or 008 controller to join an attacker-controlled access point, after which malicious code gains full device control.
Summary
What happened
Firmware update validation in Electra Air OSK201 allows physically proximate attackers to install arbitrary firmware over a malicious Wi-Fi network. The OTA handler accepts an MQTT update command, downloads firmware over HTTP, checks only its supplied MD5 value, and flashes it without signature verification. Exploitation requires an unprovisioned revision 007 or 008 controller to join an attacker-controlled access point, after which malicious code gains full device control.
The record
- CVE
- CVE-2023-24503
- Published
- Apr 17, 2023
- Updated
- Feb 6, 2025
- Vendor
- Electra Air
- Product
- OSK201
- Classifications
- CWE-494, T1495
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 17, 2023CVE publishedPublication date reported by the CVE source.
- Feb 6, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=Update to the latest version <Update to the latest version*
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.
Public exploit references
- OSK201 malicious access-point firmware-update demonstrationfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo