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.
http://php.net/ChangeLog-5.php
http://php.net/ChangeLog-7.php
http://www.securityfocus.com/bid/104022
https://access.redhat.com/errata/RHSA-2019:2519
https://bugs.php.net/bug.php?id=75605
https://lists.debian.org/debian-lts-announce/2018/05/msg00004.html
https://lists.debian.org/debian-lts-announce/2018/06/msg00005.html
https://security.gentoo.org/glsa/201812-01
https://security.netapp.com/advisory/ntap-20180607-0003/
https://usn.ubuntu.com/3646-1/
https://usn.ubuntu.com/3646-2/
Source: MITRE
Published: 2018-04-29
Updated: 2019-08-19
Type: CWE-200
Base Score: 1.9
Vector: AV:L/AC:M/Au:N/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 3.4
Severity: LOW
Base Score: 4.7
Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Impact Score: 3.6
Exploitability Score: 1
Severity: MEDIUM