CVE-2021-39184 Information

Description

Electron is a framework for writing cross-platform desktop applications using JavaScript HTML and CSS. A vulnerability in versions prior to 11.5.0 12.1.0 and 13.3.0 allows a sandboxed renderer to request a humbnail\ image of an arbitrary file on the user’s system. The thumbnail can potentially include significant parts of the original file including textual data in many cases. Versions 15.0.0-alpha.10 14.0.0 13.3.0 12.1.0 and 11.5.0 all contain a fix for the vulnerability. Two workarounds aside from upgrading are available. One may make the vulnerability significantly more difficult for an attacker to exploit by enabling contextIsolation in one’s app. One may also disable the functionality of the createThumbnailFromPath API if one does not need it.

CVSS Vector

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

Reference

https://github.com/electron/electron/pull/30728 https://github.com/electron/electron/security/advisories/GHSA-mpjm-v997-c4h4

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

8.6