Vulnerability-Lookup

CVE-2024-39698 (GCVE-0-2024-39698)

Vulnerability from cvelistv5 – Published: 2024-07-09 17:50 – Updated: 2024-08-02 04:26

Title

Code Signing Bypass on Windows in electron-updater < 6.3.0-alpha.6

Summary

electron-updater allows for automatic updates for Electron apps. The file `packages/electron-updater/src/windowsExecutableCodeSignatureVerifier.ts` implements the signature validation routine for Electron applications on Windows. Because of the surrounding shell, a first pass by `cmd.exe` expands any environment variable found in command-line above. This creates a situation where `verifySignature()` can be tricked into validating the certificate of a different file than the one that was just downloaded. If the step is successful, the malicious update will be executed even if its signature is invalid. This attack assumes a compromised update manifest (server compromise, Man-in-the-Middle attack if fetched over HTTP, Cross-Site Scripting to point the application to a malicious updater server, etc.). The patch is available starting from 6.3.0-alpha.6.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE

CWE-154 - Improper Neutralization of Variable Name Delimiters

Assigner

GitHub_M

References

URL

Tags

	https://github.com/electron-userland/electron-bui…	x_refsource_CONFIRM
	https://github.com/electron-userland/electron-bui…	x_refsource_MISC
	https://github.com/electron-userland/electron-bui…	x_refsource_MISC
	https://github.com/electron-userland/electron-bui…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	electron-userland	electron-builder	Affected: < 6.3.0-alpha.6

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2024-39698

Vulnerability from fkie_nvd - Published: 2024-07-09 18:15 - Updated: 2024-11-21 09:28

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/electron-userland/electron-builder/blob/140e2f0eb0df79c2a46e35024e96d0563355fc89/packages/electron-updater/src/windowsExecutableCodeSignatureVerifier.ts#L35-L41	Product
security-advisories@github.com	https://github.com/electron-userland/electron-builder/commit/ac2e6a25aa491c1ef5167a552c19fc2085cd427f	Patch
security-advisories@github.com	https://github.com/electron-userland/electron-builder/pull/8295	Issue Tracking, Patch
security-advisories@github.com	https://github.com/electron-userland/electron-builder/security/advisories/GHSA-9jxc-qjr9-vjxq	Exploit, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/electron-userland/electron-builder/blob/140e2f0eb0df79c2a46e35024e96d0563355fc89/packages/electron-updater/src/windowsExecutableCodeSignatureVerifier.ts#L35-L41	Product
af854a3a-2127-422b-91ae-364da2661108	https://github.com/electron-userland/electron-builder/commit/ac2e6a25aa491c1ef5167a552c19fc2085cd427f	Patch
af854a3a-2127-422b-91ae-364da2661108	https://github.com/electron-userland/electron-builder/pull/8295	Issue Tracking, Patch
af854a3a-2127-422b-91ae-364da2661108	https://github.com/electron-userland/electron-builder/security/advisories/GHSA-9jxc-qjr9-vjxq	Exploit, Vendor Advisory

Impacted products

Vendor	Product	Version
electron	electron-builder	*
electron	electron-builder	6.3.0
electron	electron-builder	6.3.0
electron	electron-builder	6.3.0
electron	electron-builder	6.3.0
electron	electron-builder	6.3.0
electron	electron-builder	6.3.0

JSON

To clipboard

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              "versionEndExcluding": "6.3.0",
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      "value": "electron-updater permite actualizaciones autom\u00e1ticas para las aplicaciones de Electron. El archivo `packages/electron-updater/src/windowsExecutableCodeSignatureVerifier.ts` implementa la rutina de validaci\u00f3n de firmas para aplicaciones Electron en Windows. Debido al shell circundante, un primer paso por `cmd.exe` expande cualquier variable de entorno que se encuentre en la l\u00ednea de comandos anterior. Esto crea una situaci\u00f3n en la que se puede enga\u00f1ar a `verifySignature()` para que valide el certificado de un archivo diferente al que se acaba de descargar. Si el paso tiene \u00e9xito, la actualizaci\u00f3n maliciosa se ejecutar\u00e1 incluso si su firma no es v\u00e1lida. Este ataque supone un manifiesto de actualizaci\u00f3n comprometido (compromiso del servidor, ataque Man-in-the-Middle si se obtiene a trav\u00e9s de HTTP, Cross Site Scripting para apuntar la aplicaci\u00f3n a un servidor de actualizaci\u00f3n malicioso, etc.). El parche est\u00e1 disponible a partir de 6.3.0-alpha.6."
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  ],
  "id": "CVE-2024-39698",
  "lastModified": "2024-11-21T09:28:14.690",
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    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/electron-userland/electron-builder/pull/8295"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/electron-userland/electron-builder/security/advisories/GHSA-9jxc-qjr9-vjxq"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Product"
      ],
      "url": "https://github.com/electron-userland/electron-builder/blob/140e2f0eb0df79c2a46e35024e96d0563355fc89/packages/electron-updater/src/windowsExecutableCodeSignatureVerifier.ts#L35-L41"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/electron-userland/electron-builder/commit/ac2e6a25aa491c1ef5167a552c19fc2085cd427f"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/electron-userland/electron-builder/pull/8295"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/electron-userland/electron-builder/security/advisories/GHSA-9jxc-qjr9-vjxq"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-154"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-9JXC-QJR9-VJXQ

Vulnerability from github – Published: 2024-07-09 17:48 – Updated: 2024-07-12 19:20

Summary

electron-updater Code Signing Bypass on Windows

Details

Observations

The file packages/electron-updater/src/windowsExecutableCodeSignatureVerifier.ts implements the signature validation routine for Electron applications on Windows. It executes the following command in a new shell (process.env.ComSpec on Windows, usually C:\Windows\System32\cmd.exe):

https://github.com/electron-userland/electron-builder/blob/140e2f0eb0df79c2a46e35024e96d0563355fc89/packages/electron-updater/src/windowsExecutableCodeSignatureVerifier.ts#L35-L41

Because of the surrounding shell, a first pass by cmd.exe expands any environment variable found in command-line above.

Exploitation

This creates a situation where verifySignature() can be tricked into validating the certificate of a different file than the one that was just downloaded. If the step is successful, the malicious update will be executed even if its signature is invalid.

Impact

This attack assumes a compromised update manifest (server compromise, Man-in-the-Middle attack if fetched over HTTP, Cross-Site Scripting to point the application to a malicious updater server, etc.).

Patch

This vulnerability was patched in #8295, by comparing the path in the output of Get-AuthenticodeSignature with the intended one. The patch is available starting from 6.3.0-alpha.6.

Severity ?

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

7.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 6.3.0-alpha.5"
      },
      "package": {
        "ecosystem": "npm",
        "name": "electron-updater"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.3.0-alpha.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-39698"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-154",
      "CWE-295"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-07-09T17:48:21Z",
    "nvd_published_at": "2024-07-09T18:15:10Z",
    "severity": "HIGH"
  },
  "details": "### Observations\nThe file `packages/electron-updater/src/windowsExecutableCodeSignatureVerifier.ts` implements the signature validation routine for Electron applications on Windows. It executes the following command in a new shell (`process.env.ComSpec` on Windows, usually `C:\\Windows\\System32\\cmd.exe`):\n\nhttps://github.com/electron-userland/electron-builder/blob/140e2f0eb0df79c2a46e35024e96d0563355fc89/packages/electron-updater/src/windowsExecutableCodeSignatureVerifier.ts#L35-L41\n\nBecause of the surrounding shell, a first pass by `cmd.exe` expands any environment variable found in command-line above.\n\n### Exploitation\n\nThis creates a situation where `verifySignature()` can be tricked into validating the certificate of a different file than the one that was just downloaded. If the step is successful, the malicious update will be executed even if its signature is invalid. \n\n### Impact\n\nThis attack assumes a compromised update manifest (server compromise, Man-in-the-Middle attack if fetched over HTTP, Cross-Site Scripting to point the application to a malicious updater server, etc.).\n\n### Patch\n\nThis vulnerability was patched in #8295, by comparing the path in the output of `Get-AuthenticodeSignature` with the intended one. The patch is available starting from 6.3.0-alpha.6.",
  "id": "GHSA-9jxc-qjr9-vjxq",
  "modified": "2024-07-12T19:20:30Z",
  "published": "2024-07-09T17:48:21Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/electron-userland/electron-builder/security/advisories/GHSA-9jxc-qjr9-vjxq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-39698"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron-userland/electron-builder/pull/8295"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron-userland/electron-builder/commit/ac2e6a25aa491c1ef5167a552c19fc2085cd427f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/electron-userland/electron-builder"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron-userland/electron-builder/blob/140e2f0eb0df79c2a46e35024e96d0563355fc89/packages/electron-updater/src/windowsExecutableCodeSignatureVerifier.ts#L35-L41"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "electron-updater Code Signing Bypass on Windows"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2024-39698 (GCVE-0-2024-39698)

FKIE_CVE-2024-39698

GHSA-9JXC-QJR9-VJXQ

Observations

Exploitation

Impact

Patch

Tags

Sightings

Nomenclature