Vulnerability · Published May 13, 2021 · Assigned by GitHub_M
CVE-2021-29510Use of "infinity" as an input to datetime and date fields causes infinite loop in pydantic
Low 3.3
In plain English
A low-severity infinite loop in pydantic from samuelcolvin. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | pydantic | 1.7.4-1 | DEBIAN-CVE-2021-29510 |
| Debian:13 | pydantic | 1.7.4-1 | DEBIAN-CVE-2021-29510 |
| Debian:14 | pydantic | 1.7.4-1 | DEBIAN-CVE-2021-29510 |
| PyPI | pydantic | 1.6.2 | GHSA-5jqp-qgf6-3pvh |
| PyPI | pydantic | 1.6.2, 1.7.4, 1.8.2 | PYSEC-2021-47 |
| PyPI | pydantic | 1.8.2 | GHSA-5jqp-qgf6-3pvh |
| PyPI | pydantic | 1.7.4 | GHSA-5jqp-qgf6-3pvh |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| samuelcolvin | pydantic | >= 1.8.0, < 1.8.2>= 1.7.0, < 1.7.4< 1.6.2 |
Weakness: CWE-835 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
References
- https://github.com/samuelcolvin/pydantic/security/advisories/GHSA-5jqp-qgf6-3pvh x_refsource_CONFIRM
- https://github.com/samuelcolvin/pydantic/commit/7e83fdd2563ffac081db7ecdf1affa65ef38c468 x_refsource_MISC
- FEDORA-2021-f8bb3ba3ec vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-4d3de3183f vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-e7fabd81fb vendor-advisory, x_refsource_FEDORA