A flaw was found in Keycloak. This vulnerability allows anyone to register a new security device or key when there is not a device already registered for any user by using the WebAuthn password-less login flow.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:3529 advisory.

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:3527 advisory.

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:3528 advisory.

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
165157	RHEL 8 : Red Hat Single Sign-On 7.4.9 security update on RHEL 8 (Moderate) (RHSA-2021:3529)	Nessus	Red Hat Local Security Checks	high
165141	RHEL 6 : Red Hat Single Sign-On 7.4.9 security update on RHEL 6 (Moderate) (RHSA-2021:3527)	Nessus	Red Hat Local Security Checks	high
165123	RHEL 7 : Red Hat Single Sign-On 7.4.9 security update on RHEL 7 (Moderate) (RHSA-2021:3528)	Nessus	Red Hat Local Security Checks	high

Detections

Analytics

CVE-2021-3632

high

Tenable Plugins

high

high

high