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

7.5HIGH

Key Information:

Vendor

Esphome

Status
Esphome
Vendor
CVE Published:
28 September 2021

What is 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.

Affected Version(s)

esphome < 2021.9.2

References

https://github.com/esphome/esphome/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/esphome/esphome/pull/2409/commits/207c...
x_refsource_MISC
https://github.com/esphome/esphome/releases/tag/2021.9.2
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.