5.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2024-33664

CVE-2024-33664: python-jose denial of service via compressed JWE content

python-jose through 3.3.0 allows attackers to cause a denial of service (resource consumption) during a decode via a crafted JSON Web Encryption (JWE) token with a high compression ratio, aka a "JWT bomb." This is similar to CVE-2024-21319.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2024-33664

CVE-2024-33664:

5.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
python-jose	pip	< 3.4.0	3.4.0

Technical Details

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Root Cause Analysis

The vulnerability is a denial of service caused by processing a JWE token with a high compression ratio. The provided pull request (https://github.com/mpdavis/python-jose/pull/345) and its associated commit (483529ee93a3ab510ab579d4d4cc644dba926ade) show a modification to the jose.jwe.decrypt function. Specifically, a size check was added at the beginning of this function to limit the size of the input JWE string (jwe_str). This directly indicates that the decrypt function was the entry point for the vulnerability, as it was responsible for handling the input that could lead to excessive resource consumption. The lack of this size check prior to the patch is what made the function vulnerable.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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