CVE-2019-10201: Improper Authentication

August 14, 2019 (updated October 9, 2019)

It was found that Keycloak’s SAML broker did not verify missing message signatures. If an attacker modifies the SAML Response and removes the <Signature> 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.

References

bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10201
nvd.nist.gov/vuln/detail/CVE-2019-10201

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