A flaw was found in Keycloak before 13.0.0 where an external identity provider, after successful authentication, redirects to a Keycloak endpoint that accepts multiple invocations with the use of the same "state" parameter. This flaw allows a malicious user to perform replay attacks.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:0969 advisory.

    Red Hat Single Sign-On 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 7.4.6 on RHEL 8 serves as a replacement for Red Hat Single Sign-On     7.4.5, and includes bug fixes and enhancements, which are documented in the Release Notes document linked     to in the References.

    Security Fix(es):

    * nodejs-angular: XSS due to regex-based HTML replacement (CVE-2020-7676)

    * keycloak: reusable state parameter at redirect_uri endpoint enables possibility of replay attacks     (CVE-2020-14302)

    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-2021:0967 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 7.4.6 on RHEL 6 serves as a replacement for Red Hat Single Sign-On     7.4.5, and includes bug fixes and enhancements, which are documented in the Release Notes document linked     to in the References.

    Security Fix(es):

    * nodejs-angular: XSS due to regex-based HTML replacement (CVE-2020-7676)

    * keycloak: reusable state parameter at redirect_uri endpoint enables possibility of replay attacks     (CVE-2020-14302)

    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-2021:0968 advisory.

    Red Hat Single Sign-On 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 7.4.6 on RHEL 7 serves as a replacement for Red Hat Single Sign-On     7.4.5, and includes bug fixes and enhancements, which are documented in the Release Notes document linked     to in the References.

    Security Fix(es):

    * nodejs-angular: XSS due to regex-based HTML replacement (CVE-2020-7676)

    * keycloak: reusable state parameter at redirect_uri endpoint enables possibility of replay attacks     (CVE-2020-14302)

    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
148019	RHEL 8 : Red Hat Single Sign-On 7.4.6 security update on RHEL 8 (Low) (RHSA-2021:0969)	Nessus	Red Hat Local Security Checks	medium
148018	RHEL 6 : Red Hat Single Sign-On 7.4.6 security update on RHEL 6 (Low) (RHSA-2021:0967)	Nessus	Red Hat Local Security Checks	medium
148016	RHEL 7 : Red Hat Single Sign-On 7.4.6 security update on RHEL 7 (Low) (RHSA-2021:0968)	Nessus	Red Hat Local Security Checks	medium

Detections

Analytics

CVE-2020-14302

medium

Tenable Plugins

medium

medium

medium