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CVE PROGRAM SOURCE RECORD8.2 High

CVE-2021-21708

UAF due to php_filter_float() failing

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Status
Published
Published
Updated
Assigning organization
php

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

PHP Group PHP

  • 7.4.x to < 7.4.28affected
  • 8.0.X to < 8.0.16affected
  • 8.1.X to < 8.1.3affected

References