In PHP versions 7.4.x below 7.4.28, 8.0.x below 8.0.16, and 8.1.x below 8.1.3, when using filter functions with FILTER_VALIDATE_FLOAT filter and min/max limits, if the filter fails, there is a possibility to trigger use of allocated memory after free, which can result it crashes, and potentially in overwrite of other memory chunks and RCE. This issue affects: code that uses FILTER_VALIDATE_FLOAT with min/max limits.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: php

Published: 2022-02-27T08:00:12.018780Z

Updated: 2024-09-17T03:18:02.531Z

Reserved: 2021-01-04T00:00:00

Link: CVE-2021-21708

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-02-27T08:15:06.817

Modified: 2024-11-21T05:48:52.737

Link: CVE-2021-21708

cve-icon Redhat

Severity : Moderate

Publid Date: 2022-02-17T00:00:00Z

Links: CVE-2021-21708 - Bugzilla