What is the vulnerability ID for this vulnerability?

The vulnerability ID for this vulnerability is CVE-2021-22969.

What is the severity of CVE-2021-22969?

The severity of CVE-2021-22969 is medium with a CVSS score of 5.3.

What is the vulnerability description of CVE-2021-22969?

CVE-2021-22969 is a vulnerability in Concrete CMS (formerly concrete5) versions below 8.5.7 that allows for a SSRF mitigation bypass using a DNS Rebind attack, enabling an attacker to fetch cloud IAAS (ex AWS) IAM keys.

How can I fix CVE-2021-22969?

To fix CVE-2021-22969, you need to upgrade Concrete CMS to version 8.5.7 or above, which includes a fix for this vulnerability.

Where can I find more information about CVE-2021-22969?

You can find more information about CVE-2021-22969 in the official Concrete CMS documentation and the HackerOne report linked in the References section.

Vulnerability/
CVE-2021-22969

medium

5.3

CWE

918

19/11/2021

23/11/2021

CVE-2021-22969

First published: Fri Nov 19 2021(Updated: )

Concrete CMS (formerly concrete5) versions below 8.5.7 has a SSRF mitigation bypass using DNS Rebind attack giving an attacker the ability to fetch cloud IAAS (ex AWS) IAM keys.To fix this Concrete CMS no longer allows downloads from the local network and specifies the validated IP when downloading rather than relying on DNS.Discoverer: Adrian Tiron from FORTBRIDGE ( https://www.fortbridge.co.uk/ )The Concrete CMS team gave this a CVSS 3.1 score of 3.5 AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N . Please note that Cloud IAAS provider mis-configurations are not Concrete CMS vulnerabilities. A mitigation for this vulnerability is to make sure that the IMDS configurations are according to a cloud provider's best practices.This fix is also in Concrete version 9.0.0

Credit: support@hackerone.com

Affected Software	Affected Version	How to fix
Concretecms Concrete Cms	<8.5.7

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Frequently Asked Questions

What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2021-22969.
What is the severity of CVE-2021-22969?
The severity of CVE-2021-22969 is medium with a CVSS score of 5.3.
What is the vulnerability description of CVE-2021-22969?
CVE-2021-22969 is a vulnerability in Concrete CMS (formerly concrete5) versions below 8.5.7 that allows for a SSRF mitigation bypass using a DNS Rebind attack, enabling an attacker to fetch cloud IAAS (ex AWS) IAM keys.
How can I fix CVE-2021-22969?
To fix CVE-2021-22969, you need to upgrade Concrete CMS to version 8.5.7 or above, which includes a fix for this vulnerability.
Where can I find more information about CVE-2021-22969?
You can find more information about CVE-2021-22969 in the official Concrete CMS documentation and the HackerOne report linked in the References section.

collector/nvd-index
vendor/concretecms
product/concrete cms
canonical/concretecms concrete cms

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