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CVE-2024-38537— Inclusion of Untrusted polyfill.io Code Vulnerability in fides.js

Quick assessment

Affected
ethyca fides
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fides是一个开源隐私工程平台，用于管理运行时环境中数据隐私请求的实现以及代码中隐私法规的执行。 Fides 2.39.1之前版本存在安全漏洞。攻击者利用该漏洞可以执行恶意脚本。

EPSS 1.43% · P72

Possible ATT&CK Techniques 1 AI

T1195.002 · Compromise Software Supply Chain
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I. Basic Information for CVE-2024-38537

Vulnerability Information
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Vulnerability Title
Inclusion of Untrusted polyfill.io Code Vulnerability in fides.js
Source: CVE Program / CVE List V5
Vulnerability Description
Fides is an open-source privacy engineering platform. `fides.js`, a client-side script used to interact with the consent management features of Fides, used the `polyfill.io` domain in a very limited edge case, when it detected a legacy browser such as IE11 that did not support the fetch standard. Therefore it was possible for users of legacy, pre-2017 browsers who navigate to a page serving `fides.js` to download and execute malicious scripts from the `polyfill.io` domain when the domain was compromised and serving malware. No exploitation of `fides.js` via `polyfill.io` has been identified as of time of publication. The vulnerability has been patched in Fides version `2.39.1`. Users are advised to upgrade to this version or later to secure their systems against this threat. On Thursday, June 27, 2024, Cloudflare and Namecheap intervened at a domain level to ensure `polyfill.io` and its subdomains could not resolve to the compromised service, rendering this vulnerability unexploitable. Prior to the domain level intervention, there were no server-side workarounds and the confidentiality, integrity, and availability impacts of this vulnerability were high. Clients could ensure they were not affected by using a modern browser that supported the fetch standard.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
从非可信控制范围包含功能例程
Source: CVE Program / CVE List V5
Vulnerability Title
Fides 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fides是一个开源隐私工程平台，用于管理运行时环境中数据隐私请求的实现以及代码中隐私法规的执行。 Fides 2.39.1之前版本存在安全漏洞。攻击者利用该漏洞可以执行恶意脚本。
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
ethyca fides < 2.39.1 -

II. Public POCs for CVE-2024-38537

# POC Description Source Link Shenlong Link
1 Here's a Python script that checks if the polyfill.io domain is present in the Content Security Policy (CSP) header of a given web application. https://github.com/Havoc10-sw/Detect_polyfill_CVE-2024-38537- POC Details
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III. Intelligence Information for CVE-2024-38537

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Patches & Fixes for CVE-2024-38537 (2)

Vendor Advisories for CVE-2024-38537 (1)

Other References for CVE-2024-38537 (2)

IV. Related Vulnerabilities

Same product: fides
Same vendor: ethyca
Same weakness: CWE-829

V. Comments for CVE-2024-38537

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