PT-2024-28636 · Unknown · Electron-Updater

Eb-Bsi + 1 · Published 2024-07-09 · Updated 2024-07-12 · CVE-2024-39698

Positive Technologies (AI Summary)

CVSS v4.0

7.7

High

Base vector

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

Name of the Vulnerable Software and Affected Versions electron-updater versions prior to 6.3.0-alpha.6

Description The issue concerns the signature validation routine for Electron applications on Windows, implemented in the file packages/electron-updater/src/windowsExecutableCodeSignatureVerifier.ts. Due to the surrounding shell, a first pass by cmd.exe expands any environment variable found in the command-line above, creating 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, such as a server compromise, Man-in-the-Middle attack if fetched over HTTP, or Cross-Site Scripting to point the application to a malicious updater server.

Recommendations For versions prior to 6.3.0-alpha.6, update to version 6.3.0-alpha.6 or later to resolve the issue. As a temporary workaround, consider restricting access to the verifySignature() function or the windowsExecutableCodeSignatureVerifier.ts file until a patch is applied. Avoid using environment variables in command-line arguments to minimize the risk of exploitation.

Exploit

Fix

Improper Certificate Validation

Weakness Enumeration

CWE-154

CWE-295

Related Identifiers

CVE-2024-39698

GHSA-9JXC-QJR9-VJXQ

Affected Products

Electron-Updater

References · 11

• 🔥 https://github.com/electron-userland/electron-builder/security/advisories/GHSA-9jxc-qjr9-vjxq · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39698.json · Exploit
• https://github.com/electron-userland/electron-builder/pull/8295 · Patch
• https://github.com/electron-userland/electron-builder/commit/ac2e6a25aa491c1ef5167a552c19fc2085cd427f · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2024-39698 · Security Note
• https://osv.dev/vulnerability/CVE-2024-39698 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-9jxc-qjr9-vjxq · Vendor Advisory
• https://github.com/electron-userland/electron-builder/blob/140e2f0eb0df79c2a46e35024e96d0563355fc89/packages/electron-updater/src/windowsExecutableCodeSignatureVerifier.ts#L35-L41 · Note
• https://github.com/electron-userland/electron-builder · Note
• https://twitter.com/CVEnew/status/1811062897159676221 · Twitter Post
• https://t.me/cvenotify/86062 · Telegram Post