CVE-2021-3827

CVSS V2 None CVSS V3 High 8.1

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.

Overview

CVE ID
CVE-2021-3827

Assigner
secalert@redhat.com

Vulnerability Status
Analyzed

Published Version
2022-08-23T16:15:10

Last Modified Date
2022-11-30T18:46:55

Weakness Enumerations

CWE	URL
CWE-287	http://cwe.mitre.org/data/definitions/287.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version End
		AND
cpe:2.3:a:redhat:keycloak::::::::	1	OR	18.0.0
cpe:2.3:a:redhat:single_sign-on:7.0:::::::*	1	OR
		AND
cpe:2.3:a:redhat:single_sign-on:7.5.0:::::::*	1	OR
cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*	0	OR
cpe:2.3:o:redhat:enterprise_linux:8.0::::-:::	0	OR
		AND
cpe:2.3:a:redhat:openshift_container_platform:4.8:::::::*	1	OR
cpe:2.3:a:redhat:openshift_container_platform:4.9:::::::*	1	OR
cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*	0	OR

CVSS Version 3

Version
3.1

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

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
LOW

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
NONE

Base Score
8.1

Base Severity
HIGH

Exploitability Score
2.8

Impact Score
5.2

References

Reference URL	Reference Tags
https://github.com/keycloak/keycloak/commit/44000caaf5051d7f218d1ad79573bd3d175cad0d
https://bugzilla.redhat.com/show_bug.cgi?id=2007512
https://access.redhat.com/security/cve/CVE-2021-3827
https://github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3v

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-3827
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3827

History

Created	Old Value	New Value	Data Type	Notes
2022-08-23 17:00:10				Added to TrackCVE
2022-12-06 14:34:38		2022-11-30T18:46:55	CVE Modified Date	updated