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CVE-2024-39689

CVE-2024-39689: Certifi removes GLOBALTRUST root certificate

Certifi 2024.07.04 removes root certificates from "GLOBALTRUST" from the root store. These are in the process of being removed from Mozilla's trust store.

GLOBALTRUST's root certificates are being removed pursuant to an investigation which identified "long-running and unresolved compliance issues". Conclusions of Mozilla's investigation can be found here.

(GitHub Advisory)

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CVE-2024-39689

CVE-2024-39689:

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
certifi	pip	>= 2021.5.30, < 2024.7.4	2024.7.4

Technical Details

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Root Cause Analysis

The vulnerability CVE-2024-39689 in certifi pertains to the inclusion of GLOBALTRUST root certificates in its CA bundle (cacert.pem), which are no longer considered trustworthy. The provided patch (commit bd8153872e9c6fc98f4023df9c2deaffea2fa463) directly addresses this by removing these certificates from the certifi/cacert.pem file and updating the package version in certifi/__init__.py.

The certifi package primarily exposes two functions for accessing this CA bundle: where() and contents(). These functions are defined in certifi/core.py and re-exported by certifi/__init__.py (as seen by the import from .core import contents, where in the __init__.py file, which was part of the commit for a version bump).

certifi.core.where(): This function returns the file path to cacert.pem. Applications use this path to configure their SSL/TLS libraries.
certifi.core.contents(): This function returns the actual content of cacert.pem.

Before the patch, these functions provided access (either path or content) to a cacert.pem file that contained the distrusted GLOBALTRUST certificates. Therefore, these are the functions that would lead to the vulnerable behavior (i.e., potentially trusting a certificate signed by a distrusted CA) when called in an unpatched version. They are the runtime indicators as they are the interface to the vulnerable data. The patch mitigates the vulnerability by changing the data (cacert.pem) that these functions serve.

Vulnerable functions

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WAF Rule

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Reasoning

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