VULNERABILITY INTELLIGENCE

CVE-2022-45061

CVSS score7.5 HIGH
EPSS probability2.67%
CISA KEVNot currently listed
Published2022-11-09
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • nvd@nist.gov: CWE-407
  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-407

Primary references