CVE-2022-1901: Security Advisory 2022-09

Summary

Sensitive variable value displayed in Variable Preview (CVE-2022-1901)

Advisory Number

2022-09

Discovery Date

26 May 2022

Patch Release Date

11 Jul 2022

Advisory Release Date

19 Aug 2022

Product

Octopus Server

Operating System

Linux and Microsoft Windows

Severity

Medium

CVE ID

CVE-2022-1901

Customers who have downloaded and installed any of the Octopus Server versions listed below (“Details”) are affected.

Please upgrade your Octopus Server immediately to fix this vulnerability.

Customers who have upgraded Octopus Server to version 2022.2.7244 or higher are not affected.

Severity

Octopus Deploy has given this vulnerability a medium rating. This rating was given according to the Octopus Deploy severity levels, which ranks vulnerabilities as critical, high, medium, or low severity.

This is our assessment and you should evaluate its applicability to your own environment.

Details

In affected versions of Octopus Deploy it is possible to unmask sensitive variables by using variable preview.

The versions of Octopus Server affected by this vulnerability are:

• All 2019.x versions after 2019.7.3
• All 2020.x and 2021.x versions
• All 2022.1.x versions before 2022.1.3009
• All 2022.2.x versions before 2022.2.7244
• All 2022.3.x versions before 2022.3.4953

As of the 19/08/2022 Octopus Server version 2022.3.x is only available on Octopus Cloud.

Fix

To address this vulnerability, we have released Octopus Server version:

• 2022.1.3009
• 2022.2.7244
• 2022.3.4953

The latest versions of Octopus Deploy products can be downloaded from https://octopus.com/downloads and previous versions can be downloaded from https://octopus.com/downloads/previous

What You Need to Do

Octopus Deploy recommends that you upgrade to the latest version (2022.2.7239). You can download the latest version of Octopus Server from https://octopus.com/downloads

If you can’t upgrade to the latest version (2022.2.7239):

If you have feature version…

…then upgrade to this version

2019.x versions after 2019.7.3

2022.1.2849 or greater

2020.x, 2021.x

2022.1.2849 or greater

2022.1.x

2022.1.2849 or greater

2022.2.x

2022.2.6729 or greater

2022.3.x

2023.3.2387 or greater

Mitigation

This vulnerability can be mitigated by removing the VariableEdit permission from roles that do not require the ability to edit Variables. The permissions cannot cross scope into other projects or environments (test permissions cant unmask prod variables).

We have reviewed the default user roles and determined that the following roles have VariableEdit (and VariableView) permission.

• Project Contributor
• Project Deployer
• Project Lead
• Runbook Producer
• Space Manager

The following role also has the VariableView permission. While this permission won’t allow the unmasking of secret variables, it will allow the users with this role the ability to see variables that have been unmasked.

• Runbook Consumer

The above roles can be modified by clearing the checkbox for the VariableEdit permission in the space permissions page of the role.

Support

If you have any questions or concerns regarding this advisory, please contact our support team https://octopus.com/support.

Exploitation and Public Announcements

The Octopus Deploy security team is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

Source

This vulnerability was identified by a customer