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cvelistMitreCVELIST:CVE-2022-45061
HistoryNov 09, 2022 - 12:00 a.m.

CVE-2022-45061

2022-11-0900:00:00
mitre
www.cve.org
1
python
algorithm
cpu
denial of service
idna
rfc 3490
decoder
hostname
http

7.9 High

AI Score

Confidence

High

0.007 Low

EPSS

Percentile

79.6%

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.

References