CVE-2021-41104

Description

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`.

How to fix CVE-2021-41104

To remediate CVE-2021-41104, upgrade the affected package to a fixed version below.

• —upgrade to 2021.9.2 or later
• —upgrade to 2234f6aacf8cc653307fed80f3750317a82c4f83 or later

Is CVE-2021-41104 being exploited?

Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 2021.9.2
• from 0, < 2234f6aacf8cc653307fed80f3750317a82c4f83 | from 0, < 2021.9.2

CVSS scores

References (9)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-41104
• PATCHgithub.com/esphome/esphome
• WEBgithub.com/esphome/esphome/commit/2234f6aacf8cc653307fed80f3750317a82c4f83
• WEBgithub.com/esphome/esphome/commit/be965a60eba6bb769e2a5afdbc8eed132f077a59