CVE-2021-29510 Information

Description

Pydantic is a data validation and settings management using Python type hinting. In affected versions 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). Pydantic has been patched with fixes available in the following versions: v1.8.2 v1.7.4 v1.6.2. All these versions are available on pypi(https://pypi.org/project/pydantic/history) and will be available on conda-forge(https://anaconda.org/conda-forge/pydantic) soon. See the changelog(https://pydantic-docs.helpmanual.io/) for details. If you absolutely can’t upgrade you can work around this risk using a validator(https://pydantic-docs.helpmanual.io/usage/validators/) to catch these values. This is not an ideal solution (in particular you’ll need a slightly different function for datetimes) instead of a hack like this you should upgrade pydantic. If you are not using v1.8.x v1.7.x or v1.6.x and are unable to upgrade to a fixed version of pydantic please create an issue at https://github.com/samuelcolvin/pydantic/issues requesting a back-port and we will endeavour to release a patch for earlier versions of pydantic.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://github.com/samuelcolvin/pydantic/security/advisories/GHSA-5jqp-qgf6-3pvh https://github.com/samuelcolvin/pydantic/commit/7e83fdd2563ffac081db7ecdf1affa65ef38c468 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UMKAJX4O6IGBBCE32CO2G7PZQCCQSBLV/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S2HT266L6Q7H6ICP7DFGXOGBJHNNKMKB/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UEFWM7DYKD2ZHE7R5YT5EQWJPV4ZKYRB/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5