CVE-2021-41104

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`.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
GitHub_MCNA
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 51%
VendorProductVersion
esphomeesphome_firmware
𝑥
< 2021.9.2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/esphome/esphome/pull/2409/commits/207cde1667d8c799a197b78ca8a5a14de8d5ca1e
https://github.com/esphome/esphome/releases/tag/2021.9.2
https://github.com/esphome/esphome/security/advisories/GHSA-48mj-p7x2-5jfm
https://github.com/esphome/esphome/pull/2409/commits/207cde1667d8c799a197b78ca8a5a14de8d5ca1e
https://github.com/esphome/esphome/releases/tag/2021.9.2
https://github.com/esphome/esphome/security/advisories/GHSA-48mj-p7x2-5jfm