What is the CVSS score of CVE-2024-39698?

CVE-2024-39698 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.3%.

Is there a public PoC exploit available for CVE-2024-39698?

Yes, a public proof-of-concept exploit is available for CVE-2024-39698. Prioritise patching immediately. EPSS: 0.3%.

Is there a patch available for CVE-2024-39698?

Yes, a patch is available for CVE-2024-39698. Update the affected software to the latest version immediately.

Electron Builder CVE-2024-39698

HIGH

Improper Neutralization of Variable Name Delimiters (CWE-154)

2024-07-09 security-advisories@github.com

XSS Microsoft Electron Builder

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Jul 09, 2024 - 18:15 nvd

HIGH 7.5

DescriptionNVD

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.

AnalysisAI

electron-updater allows for automatic updates for Electron apps. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-154. 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. Affected products include: Electron Electron-Builder.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.