vulnerability

Red Hat: CVE-2021-21703: CVE-2021-21703 php: Local privilege escalation via PHP-FPM (Multiple Advisories)

Severity
7
CVSS
(AV:L/AC:M/Au:N/C:C/I:C/A:C)
Published
2021-10-25
Added
2022-05-13
Modified
2024-11-26

Description

In PHP versions 7.3.x up to and including 7.3.31, 7.4.x below 7.4.25 and 8.0.x below 8.0.12, when running PHP FPM SAPI with main FPM daemon process running as root and child worker processes running as lower-privileged users, it is possible for the child processes to access memory shared with the main process and write to it, modifying it in a way that would cause the root process to conduct invalid memory reads and writes, which can be used to escalate privileges from local unprivileged user to the root user.

Solution(s)

redhat-upgrade-apcu-panelredhat-upgrade-libzipredhat-upgrade-libzip-debuginforedhat-upgrade-libzip-debugsourceredhat-upgrade-libzip-develredhat-upgrade-libzip-toolsredhat-upgrade-libzip-tools-debuginforedhat-upgrade-phpredhat-upgrade-php-bcmathredhat-upgrade-php-bcmath-debuginforedhat-upgrade-php-cliredhat-upgrade-php-cli-debuginforedhat-upgrade-php-commonredhat-upgrade-php-common-debuginforedhat-upgrade-php-dbaredhat-upgrade-php-dba-debuginforedhat-upgrade-php-dbgredhat-upgrade-php-dbg-debuginforedhat-upgrade-php-debuginforedhat-upgrade-php-debugsourceredhat-upgrade-php-develredhat-upgrade-php-embeddedredhat-upgrade-php-embedded-debuginforedhat-upgrade-php-enchantredhat-upgrade-php-enchant-debuginforedhat-upgrade-php-ffiredhat-upgrade-php-ffi-debuginforedhat-upgrade-php-fpmredhat-upgrade-php-fpm-debuginforedhat-upgrade-php-gdredhat-upgrade-php-gd-debuginforedhat-upgrade-php-gmpredhat-upgrade-php-gmp-debuginforedhat-upgrade-php-intlredhat-upgrade-php-intl-debuginforedhat-upgrade-php-jsonredhat-upgrade-php-json-debuginforedhat-upgrade-php-ldapredhat-upgrade-php-ldap-debuginforedhat-upgrade-php-mbstringredhat-upgrade-php-mbstring-debuginforedhat-upgrade-php-mysqlndredhat-upgrade-php-mysqlnd-debuginforedhat-upgrade-php-odbcredhat-upgrade-php-odbc-debuginforedhat-upgrade-php-opcacheredhat-upgrade-php-opcache-debuginforedhat-upgrade-php-pdoredhat-upgrade-php-pdo-debuginforedhat-upgrade-php-pearredhat-upgrade-php-pecl-apcuredhat-upgrade-php-pecl-apcu-debuginforedhat-upgrade-php-pecl-apcu-debugsourceredhat-upgrade-php-pecl-apcu-develredhat-upgrade-php-pecl-rrdredhat-upgrade-php-pecl-rrd-debuginforedhat-upgrade-php-pecl-rrd-debugsourceredhat-upgrade-php-pecl-xdebugredhat-upgrade-php-pecl-xdebug-debuginforedhat-upgrade-php-pecl-xdebug-debugsourceredhat-upgrade-php-pecl-zipredhat-upgrade-php-pecl-zip-debuginforedhat-upgrade-php-pecl-zip-debugsourceredhat-upgrade-php-pgsqlredhat-upgrade-php-pgsql-debuginforedhat-upgrade-php-processredhat-upgrade-php-process-debuginforedhat-upgrade-php-snmpredhat-upgrade-php-snmp-debuginforedhat-upgrade-php-soapredhat-upgrade-php-soap-debuginforedhat-upgrade-php-xmlredhat-upgrade-php-xml-debuginforedhat-upgrade-php-xmlrpcredhat-upgrade-php-xmlrpc-debuginfo
Title
NEW

Explore Exposure Command

Confidently identify and prioritize exposures from endpoint to cloud with full attack surface visibility and threat-aware risk context.