CVE-2021-3827

Name
CVE-2021-3827
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.
NVD Severity
high
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

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

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:* single_sign-on == None == 7.0
cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:* keycloak >= None < 18.0.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status