A flaw was found in Keycloak before version 12.0.0 where it is possible to update the user's metadata attributes using Account REST API. This flaw allows an attacker to change its own NameID attribute to impersonate the admin user for any particular application.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2020:5528 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 7.4.4 on RHEL 8 serves as a replacement for Red Hat Single Sign-On     7.4.3, and includes bug fixes and enhancements, which are documented in the Release Notes document linked     to in the References.

    Security Fix(es):

    * keycloak: Account REST API can update user metadata attributes (CVE-2020-27826)

    For more details about the security issue(s), including the impact, a CVSS score, 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 this issue 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 a vulnerability as referenced in the RHSA-2020:5527 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 7.4.4 on RHEL 7 serves as a replacement for Red Hat Single Sign-On     7.4.3, and includes bug fixes and enhancements, which are documented in the Release Notes document linked     to in the References.

    Security Fix(es):

    * keycloak: Account REST API can update user metadata attributes (CVE-2020-27826)

    For more details about the security issue(s), including the impact, a CVSS score, 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 this issue 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 a vulnerability as referenced in the RHSA-2020:5526 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 7.4.4 on RHEL 6 serves as a replacement for Red Hat Single Sign-On     7.4.3, and includes bug fixes and enhancements, which are documented in the Release Notes document linked     to in the References.

    Security Fix(es):

    * keycloak: Account REST API can update user metadata attributes (CVE-2020-27826)

    For more details about the security issue(s), including the impact, a CVSS score, 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 this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
144391	RHEL 8 : Red Hat Single Sign-On 7.4.4 security update on RHEL 8 (Low) (RHSA-2020:5528)	Nessus	Red Hat Local Security Checks	medium
144379	RHEL 7 : Red Hat Single Sign-On 7.4.4 security update on RHEL 7 (Low) (RHSA-2020:5527)	Nessus	Red Hat Local Security Checks	medium
144377	RHEL 6 : Red Hat Single Sign-On 7.4.4 security update on RHEL 6 (Low) (RHSA-2020:5526)	Nessus	Red Hat Local Security Checks	medium

Detections

Analytics

CVE-2020-27826

medium

Tenable Plugins

medium

medium

medium