#VU23450 OS Command Injection in Ansible - CVE-2019-14905

Vulnerability identifier: #VU23450

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-14905

CWE-ID: CWE-78

Exploitation vector: Local

Exploit availability: No

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

Vendor: Red Hat Inc.

Description

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

The vulnerability exists due to incorrect validation of filenames within the nxos_file_copy module when copying files to a flash or bootflash on NXOS devices using the remote_file parameter. A local user or malicious code can abuse this functionality to inject and execute arbitrary OS commands on the system with elevated privileges.

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=1776943
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?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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