Vulnerability Description
An encryption-bypass issue was discovered on Espressif ESP-IDF devices through 4.2, ESP8266_NONOS_SDK devices through 3.0.3, and ESP8266_RTOS_SDK devices through 3.3. Broadcasting forged beacon frames forces a device to change its authentication mode to OPEN, effectively disabling its 802.11 encryption.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Espressif | Esp-Idf | <= 4.2 |
| Espressif | Esp8266 Nonos Sdk | <= 3.0.3 |
| Espressif | Esp8266 Rtos Sdk | <= 3.3 |
Related Weaknesses (CWE)
References
- https://github.com/espressif/ESP8266_NONOS_SDKThird Party Advisory
- https://github.com/espressif/ESP8266_RTOS_SDKThird Party Advisory
- https://github.com/espressif/esp-idfThird Party Advisory
- https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocExploitPatchThird Party Advisory
- https://github.com/espressif/ESP8266_NONOS_SDKThird Party Advisory
- https://github.com/espressif/ESP8266_RTOS_SDKThird Party Advisory
- https://github.com/espressif/esp-idfThird Party Advisory
- https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocExploitPatchThird Party Advisory
FAQ
What is CVE-2020-12638?
CVE-2020-12638 is a vulnerability with a CVSS score of 6.8 (MEDIUM). An encryption-bypass issue was discovered on Espressif ESP-IDF devices through 4.2, ESP8266_NONOS_SDK devices through 3.0.3, and ESP8266_RTOS_SDK devices through 3.3. Broadcasting forged beacon frames...
How severe is CVE-2020-12638?
CVE-2020-12638 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-12638?
Check the references section above for vendor advisories and patch information. Affected products include: Espressif Esp-Idf, Espressif Esp8266 Nonos Sdk, Espressif Esp8266 Rtos Sdk.