Denial of service in Python when parsing cookies

1) Resource exhaustion

EUVDB-ID: #VU96945

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-7592

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources within the 'http.cookies' standard library module when parsing cookies that contained backslashes for quoted characters in the cookie value. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Python: 3.8 - 3.12.5

CPE2.3

• cpe:2.3:a:python_org:python:3.8.19:*:*:*:*:*:*:*
• cpe:2.3:a:python_org:python:3.9.19:*:*:*:*:*:*:*
• cpe:2.3:a:python_org:python:3.12.5:*:*:*:*:*:*:*

External links

http://github.com/python/cpython/pull/123075
http://github.com/python/cpython/issues/123067
http://mail.python.org/archives/list/security-announce@python.org/thread/HXJAAAALNUNGCQUS2W7WR6GFIZIHFOOK/
http://github.com/python/cpython/commit/391e5626e3ee5af267b97e37abc7475732e67621
http://github.com/python/cpython/commit/dcc3eaef98cd94d6cb6cb0f44bd1c903d04f33b1
http://github.com/python/cpython/commit/a77ab24427a18bff817025adb03ca920dc3f1a06
http://github.com/python/cpython/commit/b2f11ca7667e4d57c71c1c88b255115f16042d9a
http://github.com/python/cpython/commit/d4ac921a4b081f7f996a5d2b101684b67ba0ed7f
http://github.com/python/cpython/commit/d662e2db2605515a767f88ad48096b8ac623c774

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.