CVE-2024-7592: python DoS — Exploit & Fix

Description

There is a LOW severity vulnerability affecting CPython, specifically the 'http.cookies' standard library module. When parsing cookies that contained backslashes for quoted characters in the cookie value, the parser would use an algorithm with quadratic complexity, resulting in excess CPU resources being used while parsing the value.

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CVSS v3.1 Score

7.5

HIGH

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

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

CWE-1333 CWE-1333

Affected Products

Vendor	Product	Versions
python	python	< 3.8.20
python	python	3.9.0 — 3.9.20
python	python	3.10.0 — 3.10.15
python	python	3.11.0 — 3.11.10
python	python	3.12.0 — 3.12.6
python	python	All
python	python	All
python	python	All
python	python	All
python	python	All
python	python	All
python	python	All
python	python	All
python	python	All
python	python	All
python	python	All
python	python	All

References

Advisories & Patches

Exploits

https://github.com/python/cpython/issues/123067

Other References

https://mail.python.org/archives/list/[email protected]/thread/HXJAAAALNUNGCQUS2W7WR6GFIZIHFOOK/ https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html https://security.netapp.com/advisory/ntap-20241018-0006/

Frequently Asked Questions

What is CVE-2024-7592? +

There is a LOW severity vulnerability affecting CPython, specifically the 'http.cookies' standard library module. When parsing cookies that contained backslashes for quoted characters in the cookie value, the parser would use an algorithm with quadratic complexity, resulting in excess CPU resources being used while parsing the value. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-7592? +

CVE-2024-7592 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-7592? +

CVE-2024-7592 affects products from python, specifically: python. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-7592? +

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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