Vulnerability Details : CVE-2020-12638
Potential exploit
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.
Vulnerability category: BypassGain privilege
Products affected by CVE-2020-12638
- cpe:2.3:a:espressif:esp-idf:*:*:*:*:*:*:*:*
- cpe:2.3:a:espressif:esp8266_nonos_sdk:*:*:*:*:*:*:*:*
- cpe:2.3:a:espressif:esp8266_rtos_sdk:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-12638
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 34 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-12638
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
4.3
|
MEDIUM | AV:A/AC:M/Au:N/C:P/I:P/A:N |
5.5
|
4.9
|
NIST | |
6.8
|
MEDIUM | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
1.6
|
5.2
|
NIST |
CWE ids for CVE-2020-12638
-
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.Assigned by: nvd@nist.gov (Primary)
-
The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-12638
-
https://github.com/espressif/esp-idf
GitHub - espressif/esp-idf: Espressif IoT Development Framework. Official development framework for ESP32.Third Party Advisory
-
https://github.com/espressif/ESP8266_RTOS_SDK
GitHub - espressif/ESP8266_RTOS_SDK: Latest ESP8266 SDK based on FreeRTOS, esp-idf style.Third Party Advisory
-
https://github.com/espressif/ESP8266_NONOS_SDK
GitHub - espressif/ESP8266_NONOS_SDK: ESP8266 nonOS SDKThird Party Advisory
-
https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessors
LBSFilm | WPA2 Authenticationmode downgrade in Espressif microprocessors (CVE-2020-12638)Exploit;Patch;Third Party Advisory
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