CVE-2022-2074: Security Advisory 2022-11

Summary

ReDoS in Variable Project Templates (CVE-2022-2074)

Advisory Number

2022-11

Discovery Date

12 Jun 2022

Patch Release Date

21 Jun 2022

Advisory Release Date

19 Aug 2022

Product

Octopus Server

Operating System

Linux and Microsoft Windows

Severity

High

CVE ID

CVE-2022-2074

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 2022.2.6872 or higher are not affected.

Severity

Octopus Deploy has given this vulnerability a high 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 perform a Regex Denial of Service using the Variable Project Template… When performed successfully, this results in Octopus Server becoming unresponsive due to excessive CPU usage.

The versions of Octopus Server affected by this vulnerability are:

• All 0.x.x, 1.x.x, 2.x.x, 3.x.x, 4.x.x versions
• All 2018.x, 2019.x, 2020.x, 2021.x versions
• All 2022.1.x versions before 2022.1.2894
• All 2022.2.x versions before 2022.2.6872
• 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:

• 2022.1.2894
• 2022.2.6872
• 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 (2022.2.6872). You can download the latest version of Octopus Server from https://octopus.com/downloads

If you can’t upgrade to the latest version (2022.2.6872):

If you have feature version…

…then upgrade to this version

0.x.x, 1.x.x, 2.x.x, 3.x.x, 4.x.x

2022.1.2894 or greater

2018.x, 2019.x, 2020.x, 2021.x

2022.1.2894 or greater

2022.1.x

2022.1.2894 or greater

2022.2.x

2022.2.6872 or greater

2022.3.x

2022.3.4953 or greater

Mitigation

There is no known mitigation for CVE-2022-2074, it is important to upgrade to a fixed version as soon as possible.

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 found by Bartłomiej Górkiewicz