Description
An issue was discovered in PHP before 5.6.35, 7.0.x before 7.0.29, 7.1.x before 7.1.16, and 7.2.x before 7.2.4. Dumpable FPM child processes allow bypassing opcache access controls because fpm_unix.c makes a PR_SET_DUMPABLE prctl call, allowing one user (in a multiuser environment) to obtain sensitive information from the process memory of a second user's PHP applications by running gcore on the PID of the PHP-FPM worker process.
Remediation
References
Related Vulnerabilities
Apache HTTP Server Other Vulnerability (CVE-2001-1449)
MODX Improper Restriction of XML External Entity Reference Vulnerability (CVE-2020-25911)
Squid Improper Certificate Validation Vulnerability (CVE-2023-46724)
DWR Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2014-5325)