VulnerabilityModified
CVE-2020-12638
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.
MEDIUM 6.8EPSS 0.47%
Does this matter?
Lower severity and a low EPSS score (0.47%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 6.8 MEDIUMCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.47% probability · 39th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-287, CWE-319
- Affected
- espressif/esp-idf · espressif/esp8266 nonos sdk · espressif/esp8266 rtos sdk
- Source
- cve@mitre.org
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-microprocessorsExploit, Patch, Third 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-microprocessorsExploit, Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.