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
WordPress Plugin Shortcoder-Create Shortcodes for Anything Security Bypass (6.3)
CrushFTP Server URL Redirection to Untrusted Site ('Open Redirect') Vulnerability (CVE-2018-18288)
ownCloud Permissions, Privileges, and Access Controls Vulnerability (CVE-2014-3835)
WordPress Plugin WP-Live Chat by 3CX Cross-Site Scripting (8.1.9)
IBM WebSEAL Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2017-1476)