Use After Free Affecting php-common package, versions <0:8.0.20-3.el9
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Test your applications- Snyk ID SNYK-CENTOS9-PHPCOMMON-2879653
- published 18 Feb 2022
- disclosed 17 Feb 2022
Introduced: 17 Feb 2022
CVE-2021-21708 Open this link in a new tabHow to fix?
Upgrade Centos:9 php-common to version 0:8.0.20-3.el9 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream php-common package and not the php-common package as distributed by Centos.
See How to fix? for Centos:9 relevant fixed versions and status.
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.