CVE-2021-21708

CVE Details

Release Date:2022-02-27

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.

See more information about CVE-2021-21708 from MITRE CVE dictionary and NIST NVD


CVSS v3.0 metrics


NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score: 9.8 Base Metrics: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Access Vector: Network Attack Complexity: Low
Privileges Required: None User Interaction: None
Scope: Unchanged Confidentiality Impact: High
Integrity Impact: High Availability Impact: High

Errata information


PlatformErrataRelease Date
Oracle Linux version 8 (libzip)ELSA-2022-76242022-11-15
Oracle Linux version 8 (libzip)ELSA-2022-76282022-11-15
Oracle Linux version 8 (php)ELSA-2022-76242022-11-15
Oracle Linux version 8 (php)ELSA-2022-76282022-11-15
Oracle Linux version 8 (php-pear)ELSA-2022-76242022-11-15
Oracle Linux version 8 (php-pear)ELSA-2022-76282022-11-15
Oracle Linux version 8 (php-pecl-apcu)ELSA-2022-76242022-11-15
Oracle Linux version 8 (php-pecl-apcu)ELSA-2022-76282022-11-15
Oracle Linux version 8 (php-pecl-rrd)ELSA-2022-76242022-11-15
Oracle Linux version 8 (php-pecl-rrd)ELSA-2022-76282022-11-15
Oracle Linux version 8 (php-pecl-xdebug)ELSA-2022-76282022-11-15
Oracle Linux version 8 (php-pecl-xdebug3)ELSA-2022-76242022-11-15
Oracle Linux version 8 (php-pecl-zip)ELSA-2022-76242022-11-15
Oracle Linux version 8 (php-pecl-zip)ELSA-2022-76282022-11-15
Oracle Linux version 9 (php)ELSA-2022-81972022-11-22



This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team

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