Vulnerability Details : 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`.
Products affected by CVE-2021-41104
- cpe:2.3:o:esphome:esphome_firmware:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-41104
0.12%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 47 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-41104
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
3.9
|
3.6
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
3.9
|
3.6
|
GitHub, Inc. |
CWE ids for CVE-2021-41104
-
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.Assigned by:
- nvd@nist.gov (Primary)
- security-advisories@github.com (Secondary)
References for CVE-2021-41104
-
https://github.com/esphome/esphome/releases/tag/2021.9.2
Release 2021.9.2 · esphome/esphome · GitHubRelease Notes;Third Party Advisory
-
https://github.com/esphome/esphome/security/advisories/GHSA-48mj-p7x2-5jfm
web_server allows OTA update without checking user defined basic auth username & password · Advisory · esphome/esphome · GitHubPatch;Third Party Advisory
-
https://github.com/esphome/esphome/pull/2409/commits/207cde1667d8c799a197b78ca8a5a14de8d5ca1e
Fix lint issues in web_server_base by jesserockz · Pull Request #2409 · esphome/esphome · GitHubPatch;Third Party Advisory
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