Subject: [ASA-202105-24] python-pydantic: denial of service

Arch Linux Security Advisory ASA-202105-24
==========================================

Severity: Medium
Date    : 2021-05-25
CVE-ID  : CVE-2021-29510
Package : python-pydantic
Type    : denial of service
Remote  : Yes
Link    : https://security.archlinux.org/AVG-1951

Summary
=======

The package python-pydantic before version 1.8.2-1 is vulnerable to
denial of service.

Resolution
==========

Upgrade to 1.8.2-1.

# pacman -Syu "python-pydantic>=1.8.2-1"

The problem has been fixed upstream in version 1.8.2.

Workaround
==========

None.

Description
===========

A security issue has been found in pydantic before version 1.8.2.
Passing either 'infinity', 'inf' or float('inf') (or their negatives)
to datetime or date fields causes validation to run forever with 100%
CPU usage (on one CPU).

Impact
======

An attacker could cause high CPU usage using invalid datetime or date
fields, leading to denial of service.

References
==========

https://github.com/samuelcolvin/pydantic/security/advisories/GHSA-5jqp-qgf6-3pvh
https://github.com/samuelcolvin/pydantic/commit/1c24f1d74ba95ea985b50bdc001ce96c813229aa
https://security.archlinux.org/CVE-2021-29510