DEBIAN-CVE-2021-21703
Dashboard / Vulnerabilities / DEBIAN-CVE-2021-21703
Summary:
Details: 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 packages
Package
Name: php7.4
Purl: pkg:deb/debian/php7.4?arch=source&distro=bullseye
Affected ranges
Type: ECOSYSTEM
Events:
Introduced- 0
Fixed -7.4.25-1+deb11u1
Affected versions
7.4.21-1+deb11u1
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
