GitHub Advisory DatabaseGHSA-4PC7-VQV5-5R3VECP SAML binding bypasses authentication flows
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS
Percentile
52.1%
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.
Affected configurations
| Vendor | Product | Version | CPE |
|---|---|---|---|
| org.keycloak | keycloak-saml-core | * | cpe:2.3:a:org.keycloak:keycloak-saml-core:*:*:*:*:*:*:*:* |
References
access.redhat.com/security/cve/CVE-2021-3827
bugzilla.redhat.com/show_bug.cgi?id=2007512
github.com/advisories/GHSA-4pc7-vqv5-5r3v
github.com/keycloak/keycloak/commit/44000caaf5051d7f218d1ad79573bd3d175cad0d
github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3v
nvd.nist.gov/vuln/detail/CVE-2021-3827
Related
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS
Percentile
52.1%