Denial of service in CPython zipfile module

1) Resource exhaustion

EUVDB-ID: #VU87685

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-2024-0450

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

External links

http://github.com/python/cpython/commit/66363b9a7b9fe7c99eba3a185b74c5fdbf842eba
http://github.com/python/cpython/commit/fa181fcf2156f703347b03a3b1966ce47be8ab3b
http://github.com/python/cpython/commit/a956e510f6336d5ae111ba429a61c3ade30a7549
http://github.com/python/cpython/commit/30fe5d853b56138dbec62432d370a1f99409fc85
http://github.com/python/cpython/commit/a2c59992e9e8d35baba9695eb186ad6c6ff85c51
http://github.com/python/cpython/commit/d05bac0b74153beb541b88b4fca33bf053990183
http://github.com/python/cpython/issues/109858
http://www.bamsoftware.com/hacks/zipbomb/
http://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.