CVE-2022-45061 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://github.com/python/cpython/issues/98433

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5