CVE-2021-41104 HIGH

CVE-2021-41104: web_server allows OTA update without checking user defined basic auth username & password

Vendor Esphome
Product esphome
Weakness CWE-306 · Missing auth
Published September 28, 2021
Last update August 4, 2024
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

What the vulnerability does

01Description

ESPHome is a system to control the ESP8266/ESP32. Anyone with web_server enabled and HTTP basic auth configured on version 2021.9.1 or older is vulnerable to an issue in which `web_server` allows over-the-air (OTA) updates without checking user defined basic auth username & password. This issue is patched in version 2021.9.2. As a workaround, one may disable or remove `web_server`.

Key dates

02Disclosure timeline

September 28, 2021 CVE published
August 4, 2024 Record updated