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CVE-2021-21708

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CVE-2021-21708

Published: Feb 27, 2022

Modified: Sep 17, 2024

PUBLISHED

CVSS v3.1

8.2

HIGH

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.

VendorProductVersions

PHP Group

PHP

affected
7.4.x - < 7.4.28
affected
8.0.X - < 8.0.16
affected
8.1.X - < 8.1.3

Weaknesses (CWE)

CWE-416

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

Low

References

GLSA-202209-20
vendor-advisory
x_refsource_GENTOO

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