CVE-2021-4041: Input Validation
First published: Wed Dec 01 2021(Updated: )
A flaw was found in ansible-runner. An improper escaping of the shell command, while calling the `ansible_runner.interface.run_command`, can lead to parameters getting executed as host's shell command. A developer could unintentionally write code that gets executed in the host rather than the virtual environment.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/ansible-runner | <2.1.0 | 2.1.0 |
| pip/ansible-runner | <2.1.0 | 2.1.0 |
| Red Hat Ansible Runner | <2.1.0 | |
| Red Hat Ansible Runner | =2.1.0-alpha1 | |
| Red Hat Ansible Runner | =2.1.0-alpha2 | |
| Red Hat Ansible Runner | =2.1.0-beta1 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2021-4041
- https://bugzilla.redhat.com/show_bug.cgi?id=2028074
- https://github.com/ansible/ansible-runner/commit/3533f265f4349a3f2a0283158cd01b59a6bbc7bd
- https://github.com/ansible/ansible-runner/blob/3d6886d1a26358ead139fef736d1c8ca07f7ab71/ansible_runner/runner.py#L257
- https://access.redhat.com/errata/RHSA-2022:0108
- https://access.redhat.com/security/cve/cve-2021-4041
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2180515
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2180516
- https://nvd.nist.gov/vuln/detail/CVE-2021-4041
- https://github.com/pypa/advisory-database/tree/main/vulns/ansible-runner/PYSEC-2022-253.yaml
- https://github.com/advisories/GHSA-6j58-grhv-2769 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2021-4041?
CVE-2021-4041 is classified as a high severity vulnerability due to the potential for executing arbitrary commands in the host shell.
How do I fix CVE-2021-4041?
To remediate CVE-2021-4041, upgrade ansible-runner to version 2.1.0 or later.
What types of systems are affected by CVE-2021-4041?
CVE-2021-4041 affects systems running versions of ansible-runner prior to 2.1.0, including its alpha and beta releases.
What can attackers achieve by exploiting CVE-2021-4041?
Exploiting CVE-2021-4041 allows attackers to execute arbitrary commands on the host system, potentially compromising its integrity.
Who is responsible for reporting and addressing CVE-2021-4041?
The vulnerability CVE-2021-4041 was reported and acknowledged by Red Hat, who is responsible for providing the necessary patches.
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