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Ansible vulnerable to Exposure of Resource to Wrong Sphere and Insecure Temporary File

Moderate severity GitHub Reviewed Published Apr 20, 2021 to the GitHub Advisory Database • Updated Sep 6, 2024

Package

pip ansible (pip)

Affected versions

>= 0, < 2.7.17
>= 2.8.0a1, < 2.8.11
>= 2.9.0a1, < 2.9.7

Patched versions

2.7.17
2.8.11
2.9.7

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

"; 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//cmdline'.

References

Published by the National Vulnerability Database Mar 11, 2020
Reviewed Apr 5, 2021
Published to the GitHub Advisory Database Apr 20, 2021
Last updated Sep 6, 2024

Severity

Moderate

EPSS score

0.090%
(40th percentile)

CVE ID

CVE-2020-1733

GHSA ID

GHSA-g4mq-6fp5-qwcf

Source code

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