CVE-2021-22969CWE-918

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…

published November 19, 2021

CVSS
—
EPSS
1%
Percentile
58.1
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00859 · 58.1th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2021-11-19T18:08Z
EPSS history
Timeline
  • 19 NOV 18:08Z
    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…
    cvelistv5