Denial of Service in Espressif ESP8266_NONOS_SDK

1) Input validation error

EUVDB-ID: #VU20935

Risk: Low

CVSSv3.1: 6.2 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:U/RC:C]

CVE-ID: CVE-2019-12588

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper validation of the RSN AuthKey suite list count in beacon frames, probe responses, and association responses by the client 802.11 mac implementation. A local attacker in radio range can send a specially crafted message and crash the application.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

ESP8266_NONOS_SDK: 2.2.0 - 3.1

External links

http://github.com/espressif
http://github.com/Matheus-Garbelini/esp32_esp8266_attacks
http://matheus-garbelini.github.io/home/post/esp8266-beacon-frame-crash/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.