vulnerability
Centos Linux: CVE-2021-21708: Moderate: php:8.0 security, bug fix, and enhancement update (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:M/Au:N/C:P/I:P/A:P) | Feb 27, 2022 | Nov 9, 2022 | Nov 9, 2022 |
Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
Feb 27, 2022
Added
Nov 9, 2022
Modified
Nov 9, 2022
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.
Solutions
centos-upgrade-apcu-panelcentos-upgrade-libzipcentos-upgrade-libzip-debuginfocentos-upgrade-libzip-debugsourcecentos-upgrade-libzip-develcentos-upgrade-libzip-toolscentos-upgrade-libzip-tools-debuginfocentos-upgrade-phpcentos-upgrade-php-bcmathcentos-upgrade-php-bcmath-debuginfocentos-upgrade-php-clicentos-upgrade-php-cli-debuginfocentos-upgrade-php-commoncentos-upgrade-php-common-debuginfocentos-upgrade-php-dbacentos-upgrade-php-dba-debuginfocentos-upgrade-php-dbgcentos-upgrade-php-dbg-debuginfocentos-upgrade-php-debuginfocentos-upgrade-php-debugsourcecentos-upgrade-php-develcentos-upgrade-php-embeddedcentos-upgrade-php-embedded-debuginfocentos-upgrade-php-enchantcentos-upgrade-php-enchant-debuginfocentos-upgrade-php-fficentos-upgrade-php-ffi-debuginfocentos-upgrade-php-fpmcentos-upgrade-php-fpm-debuginfocentos-upgrade-php-gdcentos-upgrade-php-gd-debuginfocentos-upgrade-php-gmpcentos-upgrade-php-gmp-debuginfocentos-upgrade-php-intlcentos-upgrade-php-intl-debuginfocentos-upgrade-php-jsoncentos-upgrade-php-json-debuginfocentos-upgrade-php-ldapcentos-upgrade-php-ldap-debuginfocentos-upgrade-php-mbstringcentos-upgrade-php-mbstring-debuginfocentos-upgrade-php-mysqlndcentos-upgrade-php-mysqlnd-debuginfocentos-upgrade-php-odbccentos-upgrade-php-odbc-debuginfocentos-upgrade-php-opcachecentos-upgrade-php-opcache-debuginfocentos-upgrade-php-pdocentos-upgrade-php-pdo-debuginfocentos-upgrade-php-pearcentos-upgrade-php-pecl-apcucentos-upgrade-php-pecl-apcu-debuginfocentos-upgrade-php-pecl-apcu-debugsourcecentos-upgrade-php-pecl-apcu-develcentos-upgrade-php-pecl-rrdcentos-upgrade-php-pecl-rrd-debuginfocentos-upgrade-php-pecl-rrd-debugsourcecentos-upgrade-php-pecl-xdebugcentos-upgrade-php-pecl-xdebug-debuginfocentos-upgrade-php-pecl-xdebug-debugsourcecentos-upgrade-php-pecl-xdebug3centos-upgrade-php-pecl-xdebug3-debuginfocentos-upgrade-php-pecl-xdebug3-debugsourcecentos-upgrade-php-pecl-zipcentos-upgrade-php-pecl-zip-debuginfocentos-upgrade-php-pecl-zip-debugsourcecentos-upgrade-php-pgsqlcentos-upgrade-php-pgsql-debuginfocentos-upgrade-php-processcentos-upgrade-php-process-debuginfocentos-upgrade-php-snmpcentos-upgrade-php-snmp-debuginfocentos-upgrade-php-soapcentos-upgrade-php-soap-debuginfocentos-upgrade-php-xmlcentos-upgrade-php-xml-debuginfocentos-upgrade-php-xmlrpccentos-upgrade-php-xmlrpc-debuginfo
References
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.