Vulnerabilities > CVE-2021-22969 - Server-Side Request Forgery (SSRF) vulnerability in Concretecms Concrete CMS

CVSS 5.0 - MEDIUM

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

PARTIAL

Integrity impact

NONE

Availability impact

NONE

network

low complexity

concretecms

CWE-918

NVD

Published: 2021-11-19

Updated: 2021-11-23

Summary

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

Vulnerable Configurations

Part	Description	Count
Application	Concretecms Concretecms Concrete CMS 5.4.1.1 Concretecms Concrete CMS 5.4.2 Concretecms Concrete CMS 5.4.2.1 Concretecms Concrete CMS 5.4.2.2 Concretecms Concrete CMS 5.6.1 Concretecms Concrete CMS 5.6.1.1 Concretecms Concrete CMS 5.6.1.2 Concretecms Concrete CMS 5.6.2 Concretecms Concrete CMS 5.6.2.1 Concretecms Concrete CMS 5.6.3 Concretecms Concrete CMS 5.6.3.1 Concretecms Concrete CMS 5.6.3.3 Concretecms Concrete CMS 5.6.3.4 Concretecms Concrete CMS 5.6.3.5 Concretecms Concrete CMS 5.6.4.0 Concretecms Concrete CMS 5.7.0 Concretecms Concrete CMS 5.7.0.1 Concretecms Concrete CMS 5.7.0.3 Concretecms Concrete CMS 5.7.0.4 Concretecms Concrete CMS 5.7.1 Concretecms Concrete CMS 5.7.2 Concretecms Concrete CMS 5.7.2.1 Concretecms Concrete CMS 5.7.3 Concretecms Concrete CMS 5.7.3.1 Concretecms Concrete CMS 5.7.4 Concretecms Concrete CMS 5.7.4.1 Concretecms Concrete CMS 5.7.4.2 Concretecms Concrete CMS 5.7.5 Concretecms Concrete CMS 5.7.5.1 Concretecms Concrete CMS 5.7.5.2 Concretecms Concrete CMS 5.7.5.3 Concretecms Concrete CMS 5.7.5.4 Concretecms Concrete CMS 5.7.5.5 Concretecms Concrete CMS 5.7.5.6 Concretecms Concrete CMS 5.7.5.7 Concretecms Concrete CMS 5.7.5.8 Concretecms Concrete CMS 5.7.5.9 Concretecms Concrete CMS 5.7.5.10 Concretecms Concrete CMS 5.7.5.11 Concretecms Concrete CMS 5.7.5.12 Concretecms Concrete CMS 5.7.5.13 Concretecms Concrete CMS 5.8.1.0 Concretecms Concrete CMS 5.8.2.0 Concretecms Concrete CMS 8.0 Concretecms Concrete CMS 8.0.1 Concretecms Concrete CMS 8.0.2 Concretecms Concrete CMS 8.0.3 Concretecms Concrete CMS 8.1.0 Concretecms Concrete CMS 8.2.0 Concretecms Concrete CMS 8.2.1 Concretecms Concrete CMS 8.3.0 Concretecms Concrete CMS 8.3.1 Concretecms Concrete CMS 8.3.2 Concretecms Concrete CMS 8.4.0 Concretecms Concrete CMS 8.4.1 Concretecms Concrete CMS 8.4.2 Concretecms Concrete CMS 8.4.3 Concretecms Concrete CMS 8.4.4 Concretecms Concrete CMS 8.4.5 Concretecms Concrete CMS 8.5.0 Concretecms Concrete CMS 8.5.1 Concretecms Concrete CMS 8.5.2 Concretecms Concrete CMS 8.5.3 Concretecms Concrete CMS 8.5.4 Concretecms Concrete CMS 8.5.5 Concretecms Concrete CMS 8.5.6	71

Common Weakness Enumeration (CWE)

CWE-918 - Server-Side Request Forgery (SSRF)

Summary

Vulnerable Configurations

Common Weakness Enumeration (CWE)

References