CVE-2024-33664: python-jose DoS — Exploit & Fix

Description

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.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

Affected Products

Vendor	Product	Versions
python-jose_project	python-jose	< 3.3.0

References

Advisories & Patches

https://github.com/mpdavis/python-jose/issues/344 https://github.com/mpdavis/python-jose/pull/345 https://github.com/mpdavis/python-jose/issues/344 https://github.com/mpdavis/python-jose/pull/345

Exploits

https://github.com/mpdavis/python-jose/issues/344 https://www.vicarius.io/vsociety/posts/jwt-bomb-in-python-jose-cve-2024-33664 https://github.com/mpdavis/python-jose/issues/344 https://www.vicarius.io/vsociety/posts/jwt-bomb-in-python-jose-cve-2024-33664

Frequently Asked Questions

What is CVE-2024-33664? +

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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2024-33664? +

CVE-2024-33664 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-33664? +

CVE-2024-33664 affects products from python-jose_project, specifically: python-jose. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-33664? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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