#VU101386 Resource exhaustion in Python - CVE-2024-12254

Vulnerability identifier: #VU101386

Vulnerability 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-2024-12254

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Python
Universal components / Libraries / Scripting languages

Vendor: Python.org

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 in asyncio._SelectorSocketTransport.writelines(). 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: 3.12.0 - 3.13.1

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External links
https://www.openwall.com/lists/oss-security/2024/12/06/1
https://github.com/python/cpython/commit/71e8429ac8e2adc10084ab5ec29a62f4b6671a82
https://github.com/python/cpython/commit/9aa0deb2eef2655a1029ba228527b152353135b5
https://github.com/python/cpython/issues/127655
https://github.com/python/cpython/pull/127656
https://mail.python.org/archives/list/security-announce@python.org/thread/H4O3UBAOAQQXGT4RE3E4XQYR5XLROORB/

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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.