Vulnerability in Electron Electron-Builder
CVE-2024-39698
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (34.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Electron Electron-Builder — versions 6.3.0
- Electron-Userland Electron-Builder — versions < 6.3.0-alpha.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/electron-userland/electron-builder/security/advisories/GHSA-9jxc-qjr… (Exploit, Vendor Advisory)
- github.com/electron-userland/electron-builder/pull/8295 (Patch, Issue Tracking)
- github.com/electron-userland/electron-builder/commit/ac2e6a25aa491c1ef5167a552c… (Patch)
- github.com/electron-userland/electron-builder/blob/140e2f0eb0df79c2a46e35024e96… (Product)
Frequently asked questions
- What is CVE-2024-39698?
- CVE-2024-39698 is a high-severity vulnerability in Electron Electron-Builder, classified under CWE-154. CVSS score: 7.5/10. Published 2024-07-09.
- How severe is CVE-2024-39698?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2024-39698 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.