Bug 2007512 (CVE-2021-3827) - CVE-2021-3827 keycloak-server-spi-private: ECP SAML binding bypasses authentication flows
Summary: CVE-2021-3827 keycloak-server-spi-private: ECP SAML binding bypasses authenti...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-3827
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 2007506
TreeView+ depends on / blocked
 
Reported: 2021-09-24 06:19 UTC by Paramvir jindal
Modified: 2022-12-01 05:03 UTC (History)
11 users (show)

Fixed In Version: keycloak-server-spi-private 18.0.0
Doc Type: ---
Doc Text:
A flaw was found in keycloak, where the default ECP binding flow allows other authentication flows to be bypassed. By exploiting this behavior, an attacker can bypass the MFA authentication by sending a SOAP request with an AuthnRequest and Authorization header with the user's credentials. The highest threat from this vulnerability is to confidentiality and integrity.
Clone Of:
Environment:
Last Closed: 2022-01-17 22:30:36 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2022:0151 0 None None None 2022-01-17 21:31:25 UTC
Red Hat Product Errata RHSA-2022:0152 0 None None None 2022-01-17 21:30:34 UTC
Red Hat Product Errata RHSA-2022:0155 0 None None None 2022-01-17 21:46:36 UTC
Red Hat Product Errata RHSA-2022:0164 0 None None None 2022-01-18 14:53:53 UTC

Description Paramvir jindal 2021-09-24 06:19:53 UTC 
For each SAML client it is possible to send an AuthnRequest message via SOAP with Basic Authorization header and Keycloak will successfully authenticate the user for the client and will not consider the authentication flow applied.

The presence of the flow is hidden from the administrator, it is not possible to disable it in the client's configuration similarly as direct grant etc.

https://issues.redhat.com/browse/KEYCLOAK-19177
Comment 1 Paramvir jindal 2021-09-24 06:21:07 UTC 
Issue can be replicated in RHSSO 7.5 hence I am marking it as affected/fix and creating tracker.
Comment 5 errata-xmlrpc 2022-01-17 21:30:32 UTC 
This issue has been addressed in the following products:

  Red Hat Single Sign-On 7.5 for RHEL 8

Via RHSA-2022:0152 https://access.redhat.com/errata/RHSA-2022:0152
Comment 6 errata-xmlrpc 2022-01-17 21:31:23 UTC 
This issue has been addressed in the following products:

  Red Hat Single Sign-On 7.5 for RHEL 7

Via RHSA-2022:0151 https://access.redhat.com/errata/RHSA-2022:0151
Comment 7 errata-xmlrpc 2022-01-17 21:46:34 UTC 
This issue has been addressed in the following products:

  RHSSO 7.5.1

Via RHSA-2022:0155 https://access.redhat.com/errata/RHSA-2022:0155
Comment 8 Product Security DevOps Team 2022-01-17 22:30:34 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-3827
Comment 9 errata-xmlrpc 2022-01-18 14:53:51 UTC 
This issue has been addressed in the following products:

  RHEL-8 based Middleware Containers

Via RHSA-2022:0164 https://access.redhat.com/errata/RHSA-2022:0164
Note You need to log in before you can comment on or make changes to this bug.