A flaw was found in Keycloak 3.4.3.Final, 4.0.0.Beta2, 4.3.0.Final. When using 'response_mode=form_post' it is possible to inject arbitrary Javascript-Code via the 'state'-parameter in the authentication URL. This allows an XSS-Attack upon succesfully login.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:3593 advisory.

    Red Hat Single Sign-On 7.2 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 7.2.5 serves as a replacement for Red Hat Single Sign-On 7.2.4, and     includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the     References.

    Security Fix(es):

    * keycloak: auth permitted with expired certs in SAML client (CVE-2018-10894)

    * keycloak: XSS-Vulnerability with response_mode=form_post (CVE-2018-14655)

    * keycloak: Open Redirect in Login and Logout (CVE-2018-14658)

    * keycloak: brute force protection not working for the entire login workflow (CVE-2018-14657)

    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.

    The CVE-2018-10894 issue was discovered by Benjamin Berg (Red Hat).

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-2018:3592 advisory.

  - keycloak: auth permitted with expired certs in SAML client (CVE-2018-10894)

  - keycloak: expiration not validated in SAML broker consumer endpoint (CVE-2018-14637)

  - keycloak: XSS-Vulnerability with response_mode=form_post (CVE-2018-14655)

  - keycloak: brute force protection not working for the entire login workflow (CVE-2018-14657)

  - keycloak: Open Redirect in Login and Logout (CVE-2018-14658)

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
118950	RHEL 7 : Red Hat Single Sign-On 7.2.5 on RHEL 7 (RHSA-2018:3593)	Nessus	Red Hat Local Security Checks	high
118949	RHEL 6 : Red Hat Single Sign-On 7.2.5 on RHEL 6 (RHSA-2018:3592)	Nessus	Red Hat Local Security Checks	high

Detections

Analytics

CVE-2018-14655

medium

Tenable Plugins

high

high