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CVE-2021-39184— Sandboxed renderers can obtain thumbnails of arbitrary files through the nativeImage API

Quick assessment

Affected
electron electron
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Electron是个人开发者的一个用户编写跨平台桌面应用的 JavaScript 框架。该框架基于 nodejs 和 Chromium 可以使用HTML，CSS实现跨平台桌面应用的编写。 Electron存在安全漏洞，该漏洞允许沙箱渲染器请求用户系统中任意文件的“缩略图”图像。缩略图可能包含原始文件的重要部分，在许多情况下包括文本数据。15.0.0-alpha版本。10、14.0.0、13.3.0、12.1.0和11.5.0都包含针对该漏洞的修复。除了升级之外，还有两种解决方案可用。其中一个可能会使脆弱性

CVSS 6.8 · Medium EPSS 1.05% · P63

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System
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I. Basic Information for CVE-2021-39184

Vulnerability Information
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Vulnerability Title
Sandboxed renderers can obtain thumbnails of arbitrary files through the nativeImage API
Source: CVE Program / CVE List V5
Vulnerability 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 "thumbnail" 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
将资源暴露给错误范围
Source: CVE Program / CVE List V5
Vulnerability Title
Electron 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Electron是个人开发者的一个用户编写跨平台桌面应用的 JavaScript 框架。该框架基于 nodejs 和 Chromium 可以使用HTML，CSS实现跨平台桌面应用的编写。 Electron存在安全漏洞，该漏洞允许沙箱渲染器请求用户系统中任意文件的“缩略图”图像。缩略图可能包含原始文件的重要部分，在许多情况下包括文本数据。15.0.0-alpha版本。10、14.0.0、13.3.0、12.1.0和11.5.0都包含针对该漏洞的修复。除了升级之外，还有两种解决方案可用。其中一个可能会使脆弱性
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
electron electron < 11.5.0 -

II. Public POCs for CVE-2021-39184

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III. Intelligence Information for CVE-2021-39184

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Patches & Fixes for CVE-2021-39184 (1)

Vendor Advisories for CVE-2021-39184 (1)

IV. Related Vulnerabilities

Same product: electron
Same vendor: electron
Same weakness: CWE-668

V. Comments for CVE-2021-39184

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