Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2022-45061

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
09/11/2022
Last modified:
03/11/2025

Description

An issue was discovered in Python before 3.11.1. An unnecessary quadratic algorithm exists in one path when processing some inputs to the IDNA (RFC 3490) decoder, such that a crafted, unreasonably long name being presented to the decoder could lead to a CPU denial of service. Hostnames are often supplied by remote servers that could be controlled by a malicious actor; in such a scenario, they could trigger excessive CPU consumption on the client attempting to make use of an attacker-supplied supposed hostname. For example, the attack payload could be placed in the Location header of an HTTP response with status code 302. A fix is planned in 3.11.1, 3.10.9, 3.9.16, 3.8.16, and 3.7.16.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
7.50
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:python:python:*:*:*:*:*:*:*:* 3.7.15 (including)
cpe:2.3:a:python:python:*:*:*:*:*:*:*:* 3.8.0 (including) 3.8.15 (including)
cpe:2.3:a:python:python:*:*:*:*:*:*:*:* 3.9.0 (including) 3.9.15 (including)
cpe:2.3:a:python:python:*:*:*:*:*:*:*:* 3.10.0 (including) 3.10.8 (including)
cpe:2.3:a:python:python:3.11.0:-:*:*:*:*:*:*
cpe:2.3:a:python:python:3.11.0:alpha1:*:*:*:*:*:*
cpe:2.3:a:python:python:3.11.0:alpha2:*:*:*:*:*:*
cpe:2.3:a:python:python:3.11.0:alpha3:*:*:*:*:*:*
cpe:2.3:a:python:python:3.11.0:alpha4:*:*:*:*:*:*
cpe:2.3:a:python:python:3.11.0:alpha5:*:*:*:*:*:*
cpe:2.3:a:python:python:3.11.0:alpha6:*:*:*:*:*:*
cpe:2.3:a:python:python:3.11.0:alpha7:*:*:*:*:*:*
cpe:2.3:a:python:python:3.11.0:beta1:*:*:*:*:*:*
cpe:2.3:a:python:python:3.11.0:beta2:*:*:*:*:*:*
cpe:2.3:a:python:python:3.11.0:beta3:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools