HIGH
PostgreSQL 10.x before 10.1, 9.6.x before 9.6.6, 9.5.x before 9.5.10, 9.4.x before 9.4.15, 9.3.x before 9.3.20, and 9.2.x before 9.2.24 runs under a non-root operating system account, and database superusers have effective ability to run arbitrary code under that system account. PostgreSQL provides a script for starting the database server during system boot. Packages of PostgreSQL for many operating systems provide their own, packager-authored startup implementations. Several implementations use a log file name that the database superuser can replace with a symbolic link. As root, they open(), chmod() and/or chown() this log file name. This often suffices for the database superuser to escalate to root privileges when root starts the server.
http://www.securityfocus.com/bid/101949
http://www.securitytracker.com/id/1039752
https://access.redhat.com/errata/RHSA-2017:3402
https://access.redhat.com/errata/RHSA-2017:3403
https://access.redhat.com/errata/RHSA-2017:3404
https://access.redhat.com/errata/RHSA-2017:3405
Source: MITRE
Published: 2017-11-22
Updated: 2017-12-11
Type: CWE-59
Base Score: 7.2
Vector: (AV:L/AC:L/Au:N/C:C/I:C/A:C)
Impact Score: 10
Exploitability Score: 3.9
Severity: HIGH
Base Score: 6.7
Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 0.8
Severity: MEDIUM