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Server-Side Request Forgery in Concrete CMS

Moderate severity GitHub Reviewed Published Nov 23, 2021 to the GitHub Advisory Database • Updated Feb 1, 2023

Package

composer concrete5/core (Composer)

Affected versions

< 8.5.7

Patched versions

8.5.7

Description

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.

References

Published by the National Vulnerability Database Nov 19, 2021
Reviewed Nov 22, 2021
Published to the GitHub Advisory Database Nov 23, 2021
Last updated Feb 1, 2023

Severity

Moderate

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(50th percentile)

Weaknesses

Server-Side Request Forgery (SSRF)

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Learn more on MITRE.

CVE ID

CVE-2021-22969

GHSA ID

GHSA-mcxr-fx5f-96qq

Source code

No known source code
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