CVE-2020-1733

Published: 11 March 2020

A race condition flaw was found in Ansible Engine 2.7.17 and prior, 2.8.9 and prior, 2.9.6 and prior when running a playbook with an unprivileged become user. When Ansible needs to run a module with become user, the temporary directory is created in /var/tmp. This directory is created with "umask 77 && mkdir -p <dir>"; this operation does not fail if the directory already exists and is owned by another user. An attacker could take advantage to gain control of the become user as the target directory can be retrieved by iterating '/proc/<pid>/cmdline'.

Priority

Medium

CVSS 3 base score: 5.0

Status

Package Release Status
ansible
Launchpad, Ubuntu, Debian
Upstream
Released (2.9.7+dfsg-1, 1.7.2+dfsg-2+deb9u3)
Ubuntu 21.10 (Impish Indri) Not vulnerable
(2.9.7+dfsg-1)
Ubuntu 21.04 (Hirsute Hippo) Not vulnerable
(2.9.7+dfsg-1)
Ubuntu 20.04 LTS (Focal Fossa) Needed

Ubuntu 18.04 LTS (Bionic Beaver) Needed

Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(end of standard support, was needed)
Ubuntu 14.04 ESM (Trusty Tahr) Needed