NVD

CVE-2021-3827 Detail

Description

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.

Severity

CVSS 3.x Severity and Metrics:

NIST: NVD

Base Score: 6.8 MEDIUM

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://access.redhat.com/security/cve/CVE-2021-3827	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2007512	Issue Tracking Vendor Advisory
https://github.com/keycloak/keycloak/commit/44000caaf5051d7f218d1ad79573bd3d175cad0d	Patch Third Party Advisory
https://github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3v	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-287	Improper Authentication	NIST Red Hat, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

2 change records found show changes

Initial Analysis by NIST 8/26/2022 10:31:12 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		AND OR cpe:2.3:a:redhat:openshift_container_platform:4.8::::::: cpe:2.3:a:redhat:openshift_container_platform:4.9::::::: OR cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
Added	CPE Configuration		AND OR cpe:2.3:a:redhat:single_sign-on:7.5.0::::::: OR cpe:2.3:o:redhat:enterprise_linux:7.0:::::::* cpe:2.3:o:redhat:enterprise_linux:8.0::::-:::
Added	CPE Configuration		OR cpe:2.3:a:redhat:keycloak::::::::* versions up to (excluding) 18.0.0 cpe:2.3:a:redhat:single_sign-on:7.0:::::::
Added	CVSS V3.1		NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Added	CWE		NIST CWE-287
Changed	Reference Type	https://access.redhat.com/security/cve/CVE-2021-3827 No Types Assigned	https://access.redhat.com/security/cve/CVE-2021-3827 Vendor Advisory
Changed	Reference Type	https://bugzilla.redhat.com/show_bug.cgi?id=2007512 No Types Assigned	https://bugzilla.redhat.com/show_bug.cgi?id=2007512 Issue Tracking, Vendor Advisory
Changed	Reference Type	https://github.com/keycloak/keycloak/commit/44000caaf5051d7f218d1ad79573bd3d175cad0d No Types Assigned	https://github.com/keycloak/keycloak/commit/44000caaf5051d7f218d1ad79573bd3d175cad0d Patch, Third Party Advisory
Changed	Reference Type	https://github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3v No Types Assigned	https://github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3v Third Party Advisory

Quick Info

CVE Dictionary Entry:
CVE-2021-3827
NVD Published Date:
08/23/2022
NVD Last Modified:
11/30/2022
Source:
Red Hat, Inc.

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