A flaw was found in Keycloak, where it did not properly check client tokens for possible revocation in its client credential flow. This flaw allows an attacker to access or modify potentially sensitive information.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2023:1044 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 7.6.2 on RHEL 8 serves as a replacement for Red Hat Single Sign-On     7.6.1, and includes bug fixes and enhancements, which are documented in the Release Notes document linked     to in the References.

    Security Fix(es):
    * keycloak: XSS on impersonation under specific circumstances (CVE-2022-1438)
    * Moment.js: Path traversal in moment.locale (CVE-2022-24785)
    * keycloak: missing email notification template allowlist (CVE-2022-1274)
    * keycloak: minimist: prototype pollution (CVE-2021-44906)
    * moment: inefficient parsing algorithm resulting in DoS (CVE-2022-31129)
    * undertow: DoS can be achieved as Undertow server waits for the LAST_CHUNK forever for EJB invocations     (CVE-2022-2764)
    * snakeyaml: Denial of Service due to missing nested depth limitation for collections (CVE-2022-25857)
    * loader-utils: loader-utils:Regular expression denial of service (CVE-2022-37603)
    * keycloak: Session takeover with OIDC offline refreshtokens (CVE-2022-3916)
    * keycloak: path traversal via double URL encoding (CVE-2022-3782)
    * snakeyaml: Uncaught exception in org.yaml.snakeyaml.composer.Composer.composeSequenceNode     (CVE-2022-38749)
    * snakeyaml: Uncaught exception in java.base/java.util.regex.Pattern$Ques.match (CVE-2022-38751)
    * snakeyaml: Uncaught exception in org.yaml.snakeyaml.constructor.BaseConstructor.constructObject     (CVE-2022-38750)
    * keycloak: Client Registration endpoint does not check token revocation (CVE-2023-0091)
    * keycloak: glob-parent: Regular Expression Denial of Service (CVE-2021-35065)
    * json5: Prototype Pollution in JSON5 via Parse Method (CVE-2022-46175)
    * keycloak: keycloak: user impersonation via stolen uuid code (CVE-2023-0264)
    * snakeyaml: Constructor Deserialization Remote Code Execution (CVE-2022-1471)
    * CXF: Apache CXF: SSRF Vulnerability (CVE-2022-46364)
    * rcue-bootstrap: bootstrap: Cross-site Scripting (XSS) in the data-container property of tooltip     (CVE-2018-14042)
    * jettison: If the value in map is the map's self, the new new JSONObject(map) cause StackOverflowError     which may lead to dos (CVE-2022-45693)
    * sshd-common: mina-sshd: Java unsafe deserialization vulnerability (CVE-2022-45047)
    * jettison: memory exhaustion via user-supplied XML or JSON data (CVE-2022-40150)
    * jettison: parser crash by stackoverflow (CVE-2022-40149)
    * jackson-databind: use of deeply nested arrays (CVE-2022-42004)
    * jackson-databind: deep wrapper array nesting wrt UNWRAP_SINGLE_VALUE_ARRAYS (CVE-2022-42003)
    * jquery: Cross-site scripting due to improper injQuery.htmlPrefilter method (CVE-2020-11022)
    * jquery: Passing HTML containing <option> elements to manipulation methods could result in untrusted code     execution (CVE-2020-11023)
    * bootstrap: Cross-site Scripting (XSS) in the collapse data-parent attribute (CVE-2018-14040)
    * jquery: Prototype pollution in object's prototype leading to denial of service, remote code execution,     or property injection (CVE-2019-11358)
    * CXF: Apache CXF: directory listing / code exfiltration (CVE-2022-46363)
    * keycloak: reflected XSS attack (CVE-2022-4137)

    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-2023:1043 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 7.6.2 on RHEL 7 serves as a replacement for Red Hat Single Sign-On     7.6.1, and includes bug fixes and enhancements, which are documented in the Release Notes document linked     to in the References.

    Security Fix(es):

    * keycloak: XSS on impersonation under specific circumstances (CVE-2022-1438)
    * Moment.js: Path traversal in moment.locale (CVE-2022-24785)
    * keycloak: missing email notification template allowlist (CVE-2022-1274)
    * keycloak: minimist: prototype pollution (CVE-2021-44906)
    * moment: inefficient parsing algorithm resulting in DoS (CVE-2022-31129)
    * undertow: DoS can be achieved as Undertow server waits for the LAST_CHUNK forever for EJB invocations     (CVE-2022-2764)
    * snakeyaml: Denial of Service due to missing nested depth limitation for collections (CVE-2022-25857)
    * loader-utils: loader-utils:Regular expression denial of service (CVE-2022-37603)
    * keycloak: Session takeover with OIDC offline refreshtokens (CVE-2022-3916)
    * keycloak: path traversal via double URL encoding (CVE-2022-3782)
    * snakeyaml: Uncaught exception in org.yaml.snakeyaml.composer.Composer.composeSequenceNode     (CVE-2022-38749)
    * snakeyaml: Uncaught exception in java.base/java.util.regex.Pattern$Ques.match (CVE-2022-38751)
    * snakeyaml: Uncaught exception in org.yaml.snakeyaml.constructor.BaseConstructor.constructObject     (CVE-2022-38750)
    * keycloak: Client Registration endpoint does not check token revocation (CVE-2023-0091)
    * keycloak: glob-parent: Regular Expression Denial of Service (CVE-2021-35065)
    * json5: Prototype Pollution in JSON5 via Parse Method (CVE-2022-46175)
    * keycloak: keycloak: user impersonation via stolen uuid code (CVE-2023-0264)
    * snakeyaml: Constructor Deserialization Remote Code Execution (CVE-2022-1471)
    * CXF: Apache CXF: SSRF Vulnerability (CVE-2022-46364)
    * rcue-bootstrap: bootstrap: Cross-site Scripting (XSS) in the data-container property of tooltip     (CVE-2018-14042)
    * jettison: If the value in map is the map's self, the new new JSONObject(map) cause StackOverflowError     which may lead to dos (CVE-2022-45693)
    * sshd-common: mina-sshd: Java unsafe deserialization vulnerability (CVE-2022-45047)
    * jettison: memory exhaustion via user-supplied XML or JSON data (CVE-2022-40150)
    * jettison: parser crash by stackoverflow (CVE-2022-40149)
    * jackson-databind: use of deeply nested arrays (CVE-2022-42004)
    * jackson-databind: deep wrapper array nesting wrt UNWRAP_SINGLE_VALUE_ARRAYS (CVE-2022-42003)
    * jquery: Cross-site scripting due to improper injQuery.htmlPrefilter method (CVE-2020-11022)
    * jquery: Passing HTML containing <option> elements to manipulation methods could result in untrusted code     execution (CVE-2020-11023)
    * bootstrap: Cross-site Scripting (XSS) in the collapse data-parent attribute (CVE-2018-14040)
    * jquery: Prototype pollution in object's prototype leading to denial of service, remote code execution,     or property injection (CVE-2019-11358)
    * CXF: Apache CXF: directory listing / code exfiltration (CVE-2022-46363)
    * keycloak: reflected XSS attack (CVE-2022-4137)

    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-2023:1045 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 7.6.2 on RHEL 9 serves as a replacement for Red Hat Single Sign-On     7.6.1, and includes bug fixes and enhancements, which are documented in the Release Notes document linked     to in the References.

    Security Fix(es):

    * keycloak: XSS on impersonation under specific circumstances (CVE-2022-1438)
    * Moment.js: Path traversal in moment.locale (CVE-2022-24785)
    * keycloak: missing email notification template allowlist (CVE-2022-1274)
    * keycloak: minimist: prototype pollution (CVE-2021-44906)
    * moment: inefficient parsing algorithm resulting in DoS (CVE-2022-31129)
    * undertow: DoS can be achieved as Undertow server waits for the LAST_CHUNK forever for EJB invocations     (CVE-2022-2764)
    * snakeyaml: Denial of Service due to missing nested depth limitation for collections (CVE-2022-25857)
    * loader-utils: loader-utils:Regular expression denial of service (CVE-2022-37603)
    * keycloak: Session takeover with OIDC offline refreshtokens (CVE-2022-3916)
    * keycloak: path traversal via double URL encoding (CVE-2022-3782)
    * snakeyaml: Uncaught exception in org.yaml.snakeyaml.composer.Composer.composeSequenceNode     (CVE-2022-38749)
    * snakeyaml: Uncaught exception in java.base/java.util.regex.Pattern$Ques.match (CVE-2022-38751)
    * snakeyaml: Uncaught exception in org.yaml.snakeyaml.constructor.BaseConstructor.constructObject     (CVE-2022-38750)
    * keycloak: Client Registration endpoint does not check token revocation (CVE-2023-0091)
    * keycloak: glob-parent: Regular Expression Denial of Service (CVE-2021-35065)
    * json5: Prototype Pollution in JSON5 via Parse Method (CVE-2022-46175)
    * keycloak: keycloak: user impersonation via stolen uuid code (CVE-2023-0264)
    * snakeyaml: Constructor Deserialization Remote Code Execution (CVE-2022-1471)
    * CXF: Apache CXF: SSRF Vulnerability (CVE-2022-46364)
    * rcue-bootstrap: bootstrap: Cross-site Scripting (XSS) in the data-container property of tooltip     (CVE-2018-14042)
    * jettison: If the value in map is the map's self, the new new JSONObject(map) cause StackOverflowError     which may lead to dos (CVE-2022-45693)
    * sshd-common: mina-sshd: Java unsafe deserialization vulnerability (CVE-2022-45047)
    * jettison: memory exhaustion via user-supplied XML or JSON data (CVE-2022-40150)
    * jettison: parser crash by stackoverflow (CVE-2022-40149)
    * jackson-databind: use of deeply nested arrays (CVE-2022-42004)
    * jackson-databind: deep wrapper array nesting wrt UNWRAP_SINGLE_VALUE_ARRAYS (CVE-2022-42003)
    * jquery: Cross-site scripting due to improper injQuery.htmlPrefilter method (CVE-2020-11022)
    * jquery: Passing HTML containing <option> elements to manipulation methods could result in untrusted code     execution (CVE-2020-11023)
    * bootstrap: Cross-site Scripting (XSS) in the collapse data-parent attribute (CVE-2018-14040)
    * jquery: Prototype pollution in object's prototype leading to denial of service, remote code execution,     or property injection (CVE-2019-11358)
    * CXF: Apache CXF: directory listing / code exfiltration (CVE-2022-46363)
    * keycloak: reflected XSS attack (CVE-2022-4137)

    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
172042	RHEL 8 : Red Hat Single Sign-On 7.6.2 security update on RHEL 8 (Important) (RHSA-2023:1044)	Nessus	Red Hat Local Security Checks	critical
172041	RHEL 7 : Red Hat Single Sign-On 7.6.2 security update on RHEL 7 (Important) (RHSA-2023:1043)	Nessus	Red Hat Local Security Checks	critical
172039	RHEL 9 : Red Hat Single Sign-On 7.6.2 security update on RHEL 9 (Important) (RHSA-2023:1045)	Nessus	Red Hat Local Security Checks	critical

Detections

Analytics

CVE-2023-0091

low

Tenable Plugins

critical

critical

critical