A flaw was found in Keycloak. This issue may allow an attacker to steal authorization codes or tokens from clients using a wildcard in the JARM response mode "form_post.jwt" which could be used to bypass the security patch implemented to address CVE-2023-6134.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:0799 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 7.6.7 on RHEL 8 serves as a replacement for Red Hat Single Sign-On     7.6.6, and includes bug fixes and enhancements, which are documented in the Release Notes document linked     to in the References.

    Security Fix(es):
    * redirect_uri validation logic that allows for a bypass of otherwise explicitly allowed hosts     (CVE-2023-6291)
    * guava: insecure temporary directory creation (CVE-2023-2976)
    * jetty-server: OutOfMemoryError for large multipart without filename read via request.getParameter()     (CVE-2023-26048)
    * jetty-server: Cookie parsing of quoted values can exfiltrate values from other cookies (CVE-2023-26049)
    * reflected XSS via wildcard in OIDC redirect_uri (CVE-2023-6134)
    * open redirect via form_post.jwt JARM response mode (CVE-2023-6927)
    * santuario: Private Key disclosure in debug-log output (CVE-2023-44483)
    * Log Injection during WebAuthn authentication or registration (CVE-2023-6484)3-44483)

    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 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-2024:0798 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 7.6.7 on RHEL 7 serves as a replacement for Red Hat Single Sign-On     7.6.6, and includes bug fixes and enhancements, which are documented in the Release Notes document linked     to in the References.

    Security Fix(es):
    * redirect_uri validation logic that allows for a bypass of otherwise explicitly allowed hosts     (CVE-2023-6291)
    * guava: insecure temporary directory creation (CVE-2023-2976)
    * jetty-server: OutOfMemoryError for large multipart without filename read via request.getParameter()     (CVE-2023-26048)
    * jetty-server: Cookie parsing of quoted values can exfiltrate values from other cookies (CVE-2023-26049)
    * reflected XSS via wildcard in OIDC redirect_uri (CVE-2023-6134)
    * open redirect via form_post.jwt JARM response mode (CVE-2023-6927)
    * santuario: Private Key disclosure in debug-log output (CVE-2023-44483)
    * Log Injection during WebAuthn authentication or registration (CVE-2023-6484)

    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 these issues 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 multiple vulnerabilities as referenced in the RHSA-2024:0800 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 7.6.7 on RHEL 9 serves as a replacement for Red Hat Single Sign-On     7.6.6, and includes bug fixes and enhancements, which are documented in the Release Notes document linked     to in the References.

    Security Fix(es):
    * redirect_uri validation logic that allows for a bypass of otherwise explicitly allowed hosts     (CVE-2023-6291)
    * guava: insecure temporary directory creation (CVE-2023-2976)
    * jetty-server: OutOfMemoryError for large multipart without filename read via request.getParameter()     (CVE-2023-26048)
    * jetty-server: Cookie parsing of quoted values can exfiltrate values from other cookies (CVE-2023-26049)
    * reflected XSS via wildcard in OIDC redirect_uri (CVE-2023-6134)
    * open redirect via form_post.jwt JARM response mode (CVE-2023-6927)
    * santuario: Private Key disclosure in debug-log output (CVE-2023-44483)
    * Log Injection during WebAuthn authentication or registration (CVE-2023-6484)

    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 these issues 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 multiple vulnerabilities as referenced in the RHSA-2024:0096 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 7.6.6 on RHEL 9 serves as a replacement for Red Hat Single Sign-On     7.6.5, and includes bug fixes and enhancements.

    Security Fix(es):
    * open redirect via form_post.jwt JARM response mode (CVE-2023-6927)

    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 these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:0095 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 7.6.6 on RHEL 8 serves as a replacement for Red Hat Single Sign-On     7.6.5, and includes bug fixes and enhancements.

    Security Fix(es):
    * open redirect via form_post.jwt JARM response mode (CVE-2023-6927)

    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 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-2024:0094 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 7.6.6 on RHEL 7 serves as a replacement for Red Hat Single Sign-On     7.6.5, and includes bug fixes and enhancements.

    Security Fix(es):
    * open redirect via form_post.jwt JARM response mode (CVE-2023-6927)

    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 these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
190501	RHEL 8 : Red Hat Single Sign-On 7.6.7 security update on RHEL 8 (Important) (RHSA-2024:0799)	Nessus	Red Hat Local Security Checks	high
190499	RHEL 7 : Red Hat Single Sign-On 7.6.7 security update on RHEL 7 (Important) (RHSA-2024:0798)	Nessus	Red Hat Local Security Checks	high
190496	RHEL 9 : Red Hat Single Sign-On 7.6.7 security update on RHEL 9 (Important) (RHSA-2024:0800)	Nessus	Red Hat Local Security Checks	high
187786	RHEL 9 : Red Hat Single Sign-On 7.6.6 security update on RHEL 9 (Moderate) (RHSA-2024:0096)	Nessus	Red Hat Local Security Checks	medium
187785	RHEL 8 : Red Hat Single Sign-On 7.6.6 security update on RHEL 8 (Moderate) (RHSA-2024:0095)	Nessus	Red Hat Local Security Checks	medium
187784	RHEL 7 : Red Hat Single Sign-On 7.6.6 security update on RHEL 7 (Moderate) (RHSA-2024:0094)	Nessus	Red Hat Local Security Checks	medium

Detections

Analytics

CVE-2023-6927

medium

Tenable Plugins

high

high

high

medium

medium

medium