CVE-2022-45061

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-11-09 · updated 2026-10-14
Weakness: CWE-407

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.

Affected products

Fedoraproject Fedora: 35, 36, 37
Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: all versions
NetApp Bootstrap Os: all versions
NetApp E-Series Performance Analyzer: all versions
NetApp Element Software: all versions
NetApp Hci: all versions
NetApp Management Services For Element Software: all versions
NetApp ONTAP Select Deploy administration utility: all versions
Python: through 3.7.15; from 3.8.0 through 3.8.15; from 3.9.0 through 3.9.15; from 3.10.0 through 3.10.8; 3.11.0, 3.11.0-alpha1, 3.11.0-alpha2, 3.11.0-alpha3, 3.11.0-alpha4, 3.11.0-alpha5 (+9)

References

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