CVE-2020-1733

ansible: insecure temporary directory when running become_user from become directive

Published Mar 11, 2020 CVSS 3.1 · 5 Medium EPSS < 1% KEV · Not listed
Description
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'.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-2202-1 ansible security update
Debian DSA Debian DSA DSA-4950-1 ansible security update
EUVD EUVD EUVD-2020-0027 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'.
Github GHSA Github GHSA GHSA-g4mq-6fp5-qwcf Ansible vulnerable to Exposure of Resource to Wrong Sphere and Insecure Temporary File
Ubuntu USN Ubuntu USN USN-5315-1 Ansible vulnerabilities
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Aug 4, 2024, 6:46 AM
Reserved
Nov 27, 2019, 12:00 AM
Status
Modified
Published
Mar 11, 2020, 7:15 PM
Modified
Jun 17, 2026, 3:02 AM
Severity
Moderate
Public date
Feb 18, 2020, 12:00 AM