#VU23449 OS Command Injection in Ansible - CVE-2019-14904

Vulnerability identifier: #VU23449

Vulnerability risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-14904

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Ansible
Server applications / Remote management servers, RDP, SSH

Vendor: Red Hat Inc.

Description

The vulnerability allows a remote user to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation when processing zone names within the solaris_zone module. A remote uuser can provide a specially crafted zone name as a parameter to the os.system() call and execute arbitrary OS commands on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Ansible: 2.7.0 rc1 - 2.7.15, 2.8.0 rc1 - 2.8.7, 2.9.0 rc1 - 2.9.1

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=1776944
https://github.com/ansible/ansible/blob/8c74df5e67fcae15d5d050ea1ffb4d6d1aa9070c/lib/ansible/modules/system/solaris_zone.py#L313
https://access.redhat.com/errata/RHSA-2020:0218
https://access.redhat.com/errata/RHSA-2020:0217
https://access.redhat.com/errata/RHSA-2020:0216
https://access.redhat.com/errata/RHSA-2020:0215

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.