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prionPRIOn knowledge basePRION:CVE-2022-45061
HistoryNov 09, 2022 - 7:15 a.m.

Code injection

2022-11-0907:15:00
PRIOn knowledge base
www.prio-n.com
18
python
version 3.11.1
idna decoder
cpu denial of service

7.7 High

AI Score

Confidence

High

0.008 Low

EPSS

Percentile

81.5%

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