CVE-2017-12148

Severity: high (CVSS 7.2 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-07-27 · updated 2026-06-17
Weakness: CWE-20

Description

A flaw was found in Ansible Tower's interface before 3.1.5 and 3.2.0 with SCM repositories. If a Tower project (SCM repository) definition does not have the 'delete before update' flag set, an attacker with commit access to the upstream playbook source repository could create a Trojan playbook that, when executed by Tower, modifies the checked out SCM repository to add git hooks. These git hooks could, in turn, cause arbitrary command and code execution as the user Tower runs as.

Affected products

Tower: before 3.1.5; before 3.2.0 — fixed in 3.1.5, 3.2.0
CloudForms: 4.5

How to fix

Upgrade to a fixed version: Tower 3.1.5, 3.2.0. Check the vendor advisory for mitigations.

References

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