CVE-2018-1053: Canonical Ubuntu Linux

High severity, CVSS 7.0. EPSS: 0.5% chance of exploitation in the next 30 days.

In postgresql 9.3.x before 9.3.21, 9.4.x before 9.4.16, 9.5.x before 9.5.11, 9.6.x before 9.6.7 and 10.x before 10.2, pg_upgrade creates file in current working directory containing the output of `pg_dumpall -g` under umask which was in effect when the user invoked pg_upgrade, and not under 0077 which is normally used for other temporary files. This can allow an authenticated attacker to read or modify the one file, which may contain encrypted or unencrypted database passwords. The attack is infeasible if a directory mode blocks the attacker searching the current working directory or if the prevailing umask blocks the attacker opening the file.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 17.10 only
• Debian Debian Linux: version 7.0 only
• PostgreSQL PostgreSQL: from 9.3.0, before 9.3.21 (fixed in 9.3.21); from 9.4.0, before 9.4.16 (fixed in 9.4.16); from 9.5.0, before 9.5.11 (fixed in 9.5.11); from 9.6.0, before 9.6.7 (fixed in 9.6.7); version 10.0 only; version 10.1 only
• Red Hat Cloudforms: version 4.6 only

Published 2018-02-09. Last modified 2026-06-17.