Safety vulnerability ID: 51789
The information on this page was manually curated by our Cybersecurity Intelligence Team.
Python 3.11.1, 3.10.9, 3.9.16, 3.8.16, and 3.7.16 include a fix for CVE-2022-45061: 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.
https://github.com/python/cpython/issues/98433
https://python-security.readthedocs.io/vuln/slow-idna-large-strings.html
Latest version: 0.9.8
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. See CVE-2022-45061.
MISC:https://github.com/python/cpython/issues/98433: https://github.com/python/cpython/issues/98433
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