CVE-2020-1734: OS Command Injection
First published: Tue Feb 11 2020(Updated: )
A flaw was found in the pipe lookup plugin of ansible. Arbitrary commands can be run, when the pipe lookup plugin uses `subprocess.Popen()` with `shell=True`, by overwriting ansible facts and the variable is not escaped by quote plugin. An attacker could take advantage and run arbitrary commands by overwriting the ansible facts.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Redhat Ansible Engine | <=2.7.16 | |
| Redhat Ansible Engine | =2.8.8 | |
| Redhat Ansible Engine | =2.9.5 | |
| Redhat Ansible Tower | <=3.3.4 | |
| Redhat Ansible Tower | =3.4.5 | |
| Redhat Ansible Tower | =3.5.5 | |
| Redhat Ansible Tower | =3.6.3 | |
| pip/ansible | <2.8.13 | 2.8.13 |
| pip/ansible | >=2.9.0a1<2.9.11 | 2.9.11 |
| pip/ansible | >=2.10.0a1<2.10.0rc1 | 2.10.0rc1 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1805339
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1805338
- https://github.com/ansible/ansible/issues/6550
- https://github.com/ansible/ansible/issues/67792
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1807874
- https://bugzilla.redhat.com/show_bug.cgi?id=1801804
- https://nvd.nist.gov/vuln/detail/CVE-2020-1734
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1734
- https://access.redhat.com/errata/RHBA-2020:0547
- https://access.redhat.com/errata/RHBA-2020:1539
- https://access.redhat.com/security/cve/CVE-2020-1734
- https://github.com/ansible/ansible/issues/70159
- https://github.com/advisories/GHSA-h39q-95q5-9jfp (Advisory)
- https://github.com/ansible/ansible/pull/70596
- https://github.com/ansible/ansible/commit/4f978af4ca16ad9828ffe42203b9615425195f8b
- https://github.com/ansible/ansible/commit/963bdd9983b91a48fb6949fb2ef41071e72d0be0
- https://github.com/ansible/ansible/commit/bff0724e9eab2770f874e018298f9ab74cc2a78f
- https://github.com/ansible/ansible/commit/e5649ca3e807f17e7c034ee22791f107162973b0
- https://github.com/pypa/advisory-database/tree/main/vulns/ansible/PYSEC-2020-6.yaml
Frequently Asked Questions
What is CVE-2020-1734?
CVE-2020-1734 is a vulnerability in the pipe lookup plugin of Ansible that allows arbitrary commands to be run.
How does CVE-2020-1734 work?
CVE-2020-1734 works by overwriting Ansible facts and running arbitrary commands when the pipe lookup plugin uses subprocess.Popen() with shell=True and the variable is not escaped by the quote plugin.
What is the severity of CVE-2020-1734?
The severity of CVE-2020-1734 is high with a CVSS score of 7.4.
Which versions of Ansible are affected by CVE-2020-1734?
Versions up to and including Ansible 2.10 are affected by CVE-2020-1734.
How can I fix CVE-2020-1734?
To fix CVE-2020-1734, upgrade to a version of Ansible that is not affected by the vulnerability.
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