6.8
MEDIUM
CVE-2020-12638
Espressif ESP-IDF and ESP8266 Encryption Bypass Vulnerability
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.

INFO

Published Date :

July 23, 2020, 4:15 p.m.

Last Modified :

July 21, 2021, 11:39 a.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

5.2

Exploitability Score :

1.6
Affected Products

The following products are affected by CVE-2020-12638 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Espressif esp-idf
2 Espressif esp8266_nonos_sdk
3 Espressif esp8266_rtos_sdk
: Total Affected Vendor : 1 | Products : 3
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-12638.

URL Resource
https://github.com/espressif/ESP8266_NONOS_SDK Third Party Advisory
https://github.com/espressif/ESP8266_RTOS_SDK Third Party Advisory
https://github.com/espressif/esp-idf Third Party Advisory
https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessors Exploit Patch Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-12638 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-12638 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CWE Remap by [email protected]

    Jul. 21, 2021

    Action Type Old Value New Value
    Changed CWE CWE-287 CWE-287 CWE-319
  • Initial Analysis by [email protected]

    Jul. 28, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:A/AC:M/Au:N/C:P/I:P/A:N)
    Added CVSS V3.1 NIST AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
    Changed Reference Type https://github.com/espressif/ESP8266_NONOS_SDK No Types Assigned https://github.com/espressif/ESP8266_NONOS_SDK Third Party Advisory
    Changed Reference Type https://github.com/espressif/ESP8266_RTOS_SDK No Types Assigned https://github.com/espressif/ESP8266_RTOS_SDK Third Party Advisory
    Changed Reference Type https://github.com/espressif/esp-idf No Types Assigned https://github.com/espressif/esp-idf Third Party Advisory
    Changed Reference Type https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessors No Types Assigned https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessors Exploit, Patch, Third Party Advisory
    Added CWE NIST CWE-287
    Added CPE Configuration OR *cpe:2.3:a:espressif:esp-idf:*:*:*:*:*:*:*:* versions up to (including) 4.2 *cpe:2.3:a:espressif:esp8266_nonos_sdk:*:*:*:*:*:*:*:* versions up to (including) 3.0.3 *cpe:2.3:a:espressif:esp8266_rtos_sdk:*:*:*:*:*:*:*:* versions up to (including) 3.3
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-12638 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-12638 weaknesses.

CAPEC-22: Exploiting Trust in Client Exploiting Trust in Client CAPEC-57: Utilizing REST's Trust in the System Resource to Obtain Sensitive Data Utilizing REST's Trust in the System Resource to Obtain Sensitive Data CAPEC-94: Adversary in the Middle (AiTM) Adversary in the Middle (AiTM) CAPEC-114: Authentication Abuse Authentication Abuse CAPEC-115: Authentication Bypass Authentication Bypass CAPEC-151: Identity Spoofing Identity Spoofing CAPEC-194: Fake the Source of Data Fake the Source of Data CAPEC-593: Session Hijacking Session Hijacking CAPEC-633: Token Impersonation Token Impersonation CAPEC-650: Upload a Web Shell to a Web Server Upload a Web Shell to a Web Server CAPEC-65: Sniff Application Code Sniff Application Code CAPEC-102: Session Sidejacking Session Sidejacking CAPEC-117: Interception Interception CAPEC-383: Harvesting Information via API Event Monitoring Harvesting Information via API Event Monitoring CAPEC-477: Signature Spoofing by Mixing Signed and Unsigned Content Signature Spoofing by Mixing Signed and Unsigned Content
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.08 }} 0.01%

score

0.33752

percentile

CVSS31 - Vulnerability Scoring System
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