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CVE-2020-4077— Context isolation bypass via contextBridge in Electron

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.

OpenJS Electron是OpenJS基金会的一款用于桌面GUI应用程序开发的开源框架。 OpenJS Electron 7.2.4之前版本、8.2.4之前版本和9.0.0-beta21之前版本中的contextIsolation模块和contextBridge模块存在安全漏洞。攻击者可利用该漏洞执行权限操作。

CVSS 7.7 · High EPSS 1.00% · P62

Possible ATT&CK Techniques 1 AI

T1601 · Modify System Image
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I. Basic Information for CVE-2020-4077

Vulnerability Information
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Vulnerability Title
Context isolation bypass via contextBridge in Electron
Source: CVE Program / CVE List V5
Vulnerability Description
In Electron before versions 7.2.4, 8.2.4, and 9.0.0-beta21, there is a context isolation bypass. Code running in the main world context in the renderer can reach into the isolated Electron context and perform privileged actions. Apps using both `contextIsolation` and `contextBridge` are affected. This is fixed in versions 9.0.0-beta.21, 8.2.4 and 7.2.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
违背信任边界
Source: CVE Program / CVE List V5
Vulnerability Title
OpenJS Electron 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenJS Electron是OpenJS基金会的一款用于桌面GUI应用程序开发的开源框架。 OpenJS Electron 7.2.4之前版本、8.2.4之前版本和9.0.0-beta21之前版本中的contextIsolation模块和contextBridge模块存在安全漏洞。攻击者可利用该漏洞执行权限操作。
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 >= 9.0.0-beta.0, <= 9.0.0-beta.20 -

II. Public POCs for CVE-2020-4077

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III. Intelligence Information for CVE-2020-4077

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Vendor Advisories for CVE-2020-4077 (1)

Other References for CVE-2020-4077 (1)

Same Patch Batch · electron · 2020-07-07 · 4 CVEs total

CVE-2020-4076 7.8 HIGH Context isolation bypass via leaked cross-context objects in Electron
CVE-2020-15096 6.8 MEDIUM Context isolation bypass via Promise in Electron
CVE-2020-4075 6.8 MEDIUM Arbitrary file read via window-open IPC in Electron

IV. Related Vulnerabilities

Same product: electron
Same vendor: electron
Same weakness: CWE-501

V. Comments for CVE-2020-4077

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