CVE-2020-12638

Public Exploit

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.

Category

6.8
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.03%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory lbsfilm.at
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/espressif/esp-idf third party advisory
https://github.com/espressif/ESP8266_NONOS_SDK third party advisory
https://github.com/espressif/ESP8266_RTOS_SDK third party advisory
https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessors patch third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2020-12638?
CVE-2020-12638 has been scored as a medium severity vulnerability.
How to fix CVE-2020-12638?
To fix CVE-2020-12638, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-12638 being actively exploited in the wild?
It is possible that CVE-2020-12638 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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