Vulnerability · Published Jul 23, 2020 · Assigned by mitre
CVE-2020-12638
Medium 6.8
In plain English
A medium-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities).
Severity (CVSS NVD)6.8Medium
Exploit odds (30 days)0.4%top 60.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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 products (as reported)
References
- https://github.com/espressif/esp-idf x_refsource_MISC
- https://github.com/espressif/ESP8266_NONOS_SDK x_refsource_MISC
- https://github.com/espressif/ESP8266_RTOS_SDK x_refsource_MISC
- https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessors x_refsource_MISC