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.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2024-07-09T17:50:28.169Z

Updated: 2024-08-02T04:26:15.985Z

Reserved: 2024-06-27T18:44:13.037Z

Link: CVE-2024-39698

cve-icon Vulnrichment

Updated: 2024-08-02T04:26:15.985Z

cve-icon NVD

Status : Analyzed

Published: 2024-07-09T18:15:10.863

Modified: 2024-07-12T17:06:45.907

Link: CVE-2024-39698

cve-icon Redhat

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