Denial of service in CPython zipfile module

1) Resource exhaustion

EUVDB-ID: #VU87685

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-0450

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 the zipfile module does not properly control consumption of internal resources when extracting files from a zip archive. A remote attacker can pass a specially crafted archive aka zip-bomb to the application, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

CPython: 3.8.0 - 3.12.2

CPE2.3

• cpe:2.3:a:python_org:cpython:3.8.18:*:*:*:*:*:*:*
• cpe:2.3:a:python_org:cpython:3.9.18:*:*:*:*:*:*:*
• cpe:2.3:a:python_org:cpython:3.12.2:*:*:*:*:*:*:*

External links

https://github.com/python/cpython/commit/66363b9a7b9fe7c99eba3a185b74c5fdbf842eba
https://github.com/python/cpython/commit/fa181fcf2156f703347b03a3b1966ce47be8ab3b
https://github.com/python/cpython/commit/a956e510f6336d5ae111ba429a61c3ade30a7549
https://github.com/python/cpython/commit/30fe5d853b56138dbec62432d370a1f99409fc85
https://github.com/python/cpython/commit/a2c59992e9e8d35baba9695eb186ad6c6ff85c51
https://github.com/python/cpython/commit/d05bac0b74153beb541b88b4fca33bf053990183
https://github.com/python/cpython/issues/109858
https://www.bamsoftware.com/hacks/zipbomb/
https://mail.python.org/archives/list/security-announce@python.org/thread/XELNUX2L3IOHBTFU7RQHCY6OUVEWZ2FG/

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.