A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to impersonate other users.

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-2023:7855 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):
    * keycloak: redirect_uri validation logic that allows for a bypass of otherwise explicitly allowed hosts     (CVE-2023-6134)
    * keycloak: reflected XSS via wildcard in OIDC redirect_uri (CVE-2023-6291)
    * keycloak: offline session token DoS (CVE-2023-6563)

    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-2023:7854 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):
    * keycloak: reflected XSS via wildcard in OIDC redirect_uri (CVE-2023-6291)
    * keycloak: redirect_uri validation logic that allows for a bypass of otherwise explicitly allowed hosts     (CVE-2023-6134)
    * keycloak: offline session token DoS (CVE-2023-6563)

    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-2023:7856 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):
    * keycloak: reflected XSS via wildcard in OIDC redirect_uri (CVE-2023-6291)
    * keycloak: redirect_uri validation logic that allows for a bypass of otherwise explicitly allowed hosts     (CVE-2023-6134)
    * keycloak: offline session token DoS (CVE-2023-6563)

    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
186940	RHEL 9 : Red Hat Single Sign-On 7.6.6 security update on RHEL 9 (Important) (RHSA-2023:7855)	Nessus	Red Hat Local Security Checks	high
186938	RHEL 7 : Red Hat Single Sign-On 7.6.6 security update on RHEL 7 (Important) (RHSA-2023:7854)	Nessus	Red Hat Local Security Checks	high
186929	RHEL 8 : Red Hat Single Sign-On 7.6.6 security update on RHEL 8 (Important) (RHSA-2023:7856)	Nessus	Red Hat Local Security Checks	high

Detections

Analytics

CVE-2023-6291

high

Tenable Plugins

high

high

high

high

high

high