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CVE-2021-21703

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.


Affected Software


CPE Name Name Version
php:php php 7.3.31
php:php php 7.4.25
php:php php 8.0.12
debian:debian_linux debian debian linux 9.0
debian:debian_linux debian debian linux 10.0
debian:debian_linux debian debian linux 11.0
fedoraproject:fedora fedoraproject fedora 33
fedoraproject:fedora fedoraproject fedora 34
fedoraproject:fedora fedoraproject fedora 35
netapp:clustered_data_ontap netapp clustered data ontap -
oracle:communications_diameter_signaling_router oracle communications diameter signaling router 8.5.0.2

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