A flaw was found in Keycloak in OAuth 2.0 Pushed Authorization Requests (PAR). Client-provided parameters were found to be included in plain text in the KC_RESTART cookie returned by the authorization server's HTTP response to a `request_uri` authorization request, possibly leading to an information disclosure vulnerability.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2024:3567 advisory.

    Red Hat Single Sign-On 7.6 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 7.6.9 on RHEL 8 serves as a replacement for Red Hat Single Sign-On     7.6.8, and includes bug fixes and enhancements, which are documented in the Release Notes document linked     to in the References.

    Security Fix(es):

    * exposure of sensitive information in Pushed Authorization Requests (PAR)     KC_RESTART cookie (CVE-2024-4540)

    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 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2024:3568 advisory.

    Red Hat Single Sign-On 7.6 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 7.6.9 on RHEL 9 serves as a replacement for Red Hat Single Sign-On     7.6.8, and includes bug fixes and enhancements, which are documented in the Release Notes document linked     to in the References.

    Security Fix(es):

    * exposure of sensitive information in Pushed Authorization Requests (PAR)     KC_RESTART cookie (CVE-2024-4540)

    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-2024:3566 advisory.

    Red Hat Single Sign-On 7.6 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 7.6.9 on RHEL 7 serves as a replacement for Red Hat Single Sign-On     7.6.8, and includes bug fixes and enhancements, which are documented in the Release Notes document linked     to in the References.

    Security Fix(es):

    * exposure of sensitive information in Pushed Authorization Requests (PAR)     KC_RESTART cookie (CVE-2024-4540)

    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
200068	RHEL 8 : Red Hat Single Sign-On 7.6.9 security update on RHEL 8 (Low) (RHSA-2024:3567)	Nessus	Red Hat Local Security Checks	high
200067	RHEL 9 : Red Hat Single Sign-On 7.6.9 security update on RHEL 9 (Low) (RHSA-2024:3568)	Nessus	Red Hat Local Security Checks	high
200063	RHEL 7 : Red Hat Single Sign-On 7.6.9 security update on RHEL 7 (Low) (RHSA-2024:3566)	Nessus	Red Hat Local Security Checks	high

Detections

Analytics

CVE-2024-4540

high

Tenable Plugins

high

high

high