Description

It was found that Keycloak's SAML broker, versions up to 6.0.1, did not verify missing message signatures. If an attacker modifies the SAML Response and removes the sections, the message is still accepted, and the message can be modified. An attacker could use this flaw to impersonate other users and gain access to sensitive information.

Remediation

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10201

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Severity

Critical

Classification

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

Tags

Issue Tracking Mitigation Vendor Advisory CWE-592