CVE-2021-41104

CVSS V2 Medium 4.3 CVSS V3 High 7.5
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`.
Overview
  • CVE ID
  • CVE-2021-41104
  • Assigner
  • security-advisories@github.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-09-28T16:15:08
  • Last Modified Date
  • 2021-10-07T14:13:41
Weakness Enumerations
CWE URL
CWE-306 http://cwe.mitre.org/data/definitions/306.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:esphome:esphome_firmware:*:*:*:*:*:*:*:* 1 OR 2021.9.2
cpe:2.3:h:espressif:esp32:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:espressif:esp8266:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:N/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 4.3
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 7.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://github.com/esphome/esphome/pull/2409/commits/207cde1667d8c799a197b78ca8a5a14de8d5ca1e Patch Third Party Advisory
https://github.com/esphome/esphome/releases/tag/2021.9.2 Release Notes Third Party Advisory
https://github.com/esphome/esphome/security/advisories/GHSA-48mj-p7x2-5jfm Patch Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-41104
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41104
History
Created Old Value New Value Data Type Notes
2022-05-10 06:52:14 Added to TrackCVE
2022-12-05 11:26:27 2021-09-28T16:15Z 2021-09-28T16:15:08 CVE Published Date updated
2022-12-05 11:26:27 2021-10-07T14:13:41 CVE Modified Date updated
2022-12-05 11:26:27 Analyzed Vulnerability Status updated