Improper IP address validation in Python

1) Input validation error

EUVDB-ID: #VU100516

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-11168

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions.

The vulnerability exists due to insufficient validation of bracketed hosts (e.g. []) within the urllib.parse.urlsplit() and urlparse() functions allowing hosts that weren't IPv6 or IPvFuture. A remote attacker can pass specially crafted IP address to the application to bypass implemented IP-based security checks or perform SSRF attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Python: 3.0 - 3.11.4

CPE2.3

• cpe:2.3:a:python_org:python:3.0.1:*:*:*:*:*:*:
• cpe:2.3:a:python_org:python:3.11.4:*:*:*:*:*:*:
• cpe:2.3:a:python_org:python:3.2.2150:*:*:*:*:*:*:
• cpe:2.3:a:python_org:python:3.3.7:*:*:*:*:*:*:
• cpe:2.3:a:python_org:python:3.4.10:*:*:*:*:*:*:
• cpe:2.3:a:python_org:python:3.5.10:*:*:*:*:*:*:
• cpe:2.3:a:python_org:python:3.6.15:*:*:*:*:*:*:
• cpe:2.3:a:python_org:python:3.7.17:*:*:*:*:*:*:
• cpe:2.3:a:python_org:python:3.8.20:*:*:*:*:*:*:
• cpe:2.3:a:python_org:python:3.9.20:*:*:*:*:*:*:

External links

http://github.com/python/cpython/commit/29f348e232e82938ba2165843c448c2b291504c5
http://github.com/python/cpython/pull/103849
http://github.com/python/cpython/issues/103848
http://mail.python.org/archives/list/security-announce@python.org/thread/XPWB6XVZ5G5KGEI63M4AWLIEUF5BPH4T/
http://github.com/python/cpython/commit/b2171a2fd41416cf68afd67460578631d755a550

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.