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CVE-2021-24045

Quick assessment

Affected
Facebook Hermes
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.

Facebook Hermes是美国Facebook公司的一个JavaScript引擎。该引擎针对React Native应用，去提高移动客户端应用App的性能，但是对浏览器 & Node.js 等服务端基础架构并不适用。 Facebook Hermes 0.10.0之前版本存在安全漏洞，该漏洞源于在Facebook Hermes中解析一元操作符“typeof”时可能会触发类型混淆漏洞。

AI Predicted 7.5 Difficulty: Moderate EPSS 1.21% · P67
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I. Basic Information for CVE-2021-24045

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A type confusion vulnerability could be triggered when resolving the "typeof" unary operator in Facebook Hermes prior to v0.10.0. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
使用不兼容类型访问资源(类型混淆)
Source: CVE Program / CVE List V5
Vulnerability Title
Facebook Hermes 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Facebook Hermes是美国Facebook公司的一个JavaScript引擎。该引擎针对React Native应用，去提高移动客户端应用App的性能，但是对浏览器 & Node.js 等服务端基础架构并不适用。 Facebook Hermes 0.10.0之前版本存在安全漏洞，该漏洞源于在Facebook Hermes中解析一元操作符“typeof”时可能会触发类型混淆漏洞。
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
Facebook Hermes 0.10.0 ~ unspecified -

II. Public POCs for CVE-2021-24045

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III. Intelligence Information for CVE-2021-24045

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Patches & Fixes for CVE-2021-24045 (1)

Other References for CVE-2021-24045 (1)

IV. Related Vulnerabilities

Same product: Hermes
Same vendor: Facebook
Same weakness: CWE-843

V. Comments for CVE-2021-24045

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