CVE Vulnerabilities

CVE-2020-12638

Improper Authentication

Published: Jul 23, 2020 | Modified: Jul 21, 2021
CVSS 3.x
6.8
MEDIUM
Source:
NVD
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 2.x
4.3 MEDIUM
AV:A/AC:M/Au:N/C:P/I:P/A:N
RedHat/V2
RedHat/V3
Ubuntu

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.

Weakness

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Affected Software

Name Vendor Start Version End Version
Esp8266_nonos_sdk Espressif * 3.0.3
Esp8266_rtos_sdk Espressif * 3.3
Esp-idf Espressif * 4.2

Potential Mitigations

References