Exposure of Resource to Wrong Sphere Affecting ansible package, versions <2.7.17-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.07% (31st percentile)

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  • Snyk IDSNYK-ALPINE39-ANSIBLE-589742
  • published21 Jul 2020
  • disclosed11 Mar 2020

Introduced: 11 Mar 2020

CVE-2020-1733  (opens in a new tab)
CWE-668  (opens in a new tab)

How to fix?

Upgrade Alpine:3.9 ansible to version 2.7.17-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ansible package and not the ansible package as distributed by Alpine. See How to fix? for Alpine:3.9 relevant fixed versions and status.

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'.

CVSS Scores

version 3.1