CVEvulnerability
CVE-2020-12638
6.8 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2020-07-23
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.8 MEDIUM — CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:A/AC:M/Au:N/C:P/I:P/A:N
- Weaknesses
- CWE-287, CWE-319
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.
Affected configurations
• espressif esp-idf (<= 4.2)
• espressif esp8266 nonos sdk (<= 3.0.3)
• espressif esp8266 rtos sdk (<= 3.3)
Related
References
- https://github.com/espressif/ESP8266_NONOS_SDK Third Party Advisory
- https://github.com/espressif/ESP8266_RTOS_SDK Third Party Advisory
- https://github.com/espressif/esp-idf Third Party Advisory
- https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessors Exploit, Patch, Third Party Advisory
- https://github.com/espressif/ESP8266_NONOS_SDK Third Party Advisory
- https://github.com/espressif/ESP8266_RTOS_SDK Third Party Advisory
- https://github.com/espressif/esp-idf Third Party Advisory
- https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessors Exploit, Patch, Third Party Advisory