Red Hat Ansible Pipe Lookup Plugin subprocess.Popen Variable os command injection

Summaryinfo

A vulnerability was found in Red Hat Ansible. It has been classified as critical. The affected element is the function subprocess.Popen of the component Pipe Lookup Plugin. The manipulation as part of Variable leads to os command injection. This vulnerability is uniquely identified as CVE-2020-1734. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability was found in Red Hat Ansible (unknown version) and classified as critical. This issue affects the function subprocess.Popen of the component Pipe Lookup Plugin. The manipulation as part of a Variable leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was disclosed 03/03/2020 as not defined bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. The identification of this vulnerability is CVE-2020-1734 since 11/27/2019. The exploitation is known to be difficult. Attacking locally is a requirement. The requirement for exploitation is a simple authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/22/2022). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Red Hat

Name

• Ansible

License

• open-source

Website

• Vendor: https://www.redhat.com/

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