CVE-2021-21708
Assigner: php
Published: 2022-02-14T00:00:00
State: PUBLISHED
affected: product: PHP
vendor: PHP Group
versions: lessThan: 7.4.28
status: affected
version: 7.4.x
versionType: custom
lessThan: 8.0.16
status: affected
version: 8.0.X
versionType: custom
lessThan: 8.1.3
status: affected
version: 8.1.X
versionType: custom
credits: value: dukk at softdev dot online
datePublic: 2022-02-14T00:00:00
descriptions: value: 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.
metrics: cvssV3_1: attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: LOW
baseScore: 8.2
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
version: 3.1
problemTypes: descriptions: cweId: CWE-416
description: CWE-416 Use After Free
type: CWE
source: defect: https://bugs.php.net/bug.php?id=81708
discovery: EXTERNAL
title: UAF due to php_filter_float() failing
x_generator: engine: Vulnogram 0.0.9