(RHSA-2021:3527) Moderate: Red Hat Single Sign-On 7.4.9 security update on RHEL 6

Red Hat Single Sign-On 7.4 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications.

This release of Red Hat Single Sign-On 7.4.9 serves as a replacement for Red Hat Single Sign-On 7.4.8, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References.

Security Fix(es):

• jackson-dataformat-cbor: Unchecked allocation of byte buffer can cause a java.lang.OutOfMemoryError exception (CVE-2020-28491)

• keycloak: Brute force attack is possible even after the account lockout (CVE-2021-3513)

• keycloak: Anyone can register a new device when there is no device registered for passwordless login (CVE-2021-3632)

• keycloak-model-infinispan: authenticationSessions map in RootAuthenticationSessionEntity grows boundlessly could lead to a DoS attack (CVE-2021-3637)

• keycloak: X509 Direct Grant Auth does not verify certificate timestamp validity (CVE-2020-35509)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.