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Red Hat Security Advisory 2023-7860-03
Red Hat Security Advisory 2023-7860-03 - Red Hat build of Keycloak 22.0.7 is now available from the Customer Portal. Issues addressed include bypass and cross site scripting vulnerabilities.
The following advisory data is extracted from:https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_7860.jsonRed Hat officially shut down their mailing list notifications October 10, 2023. Due to this, Packet Storm has recreated the below data as a reference point to raise awareness. It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis: Important: Red Hat build of Keycloak 22.0.7 enhancement and security updateAdvisory ID: RHSA-2023:7860-03Product: Red Hat build of KeycloakAdvisory URL: https://access.redhat.com/errata/RHSA-2023:7860Issue date: 2023-12-14Revision: 03CVE Names: CVE-2023-6134====================================================================Summary: Red Hat build of Keycloak 22.0.7 is now available from the Customer Portal.Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:Red Hat build of Keycloak 22.0.7 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 build of Keycloak 22.0.7 serves as a replacement for Red Hat build of Keycloak 22.0.6, and includes bug fixes, enhancements and security fixes, 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-2023-6134)* reflected XSS via wildcard in OIDC redirect_uri (CVE-2023-6291)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.Solution:https://access.redhat.com/documentation/en-us/red_hat_build_of_keycloak/22.0/html-single/migration_guide/CVEs:CVE-2023-6134References:https://access.redhat.com/security/updates/classification/#importanthttps://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=rhbk&downloadType=distributions&version=22.0.7https://bugzilla.redhat.com/show_bug.cgi?id=2249673https://bugzilla.redhat.com/show_bug.cgi?id=2251407Related news
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An issue was found in the redirect_uri validation logic that allows for a bypass of otherwise explicitly allowed hosts. The problem arises in the verifyRedirectUri method, which attempts to enforce rules on user-controllable input, but essentially causes a desynchronization in how Keycloak and browsers interpret URLs. Keycloak, for example, receives "[www%2ekeycloak%2eorg%2fapp%2f:[email protected]](https://www%2ekeycloak%2eorg%2fapp%2f:[email protected]/)" and thinks the authority to be keycloak.org when it is actually example.com. This happens because the validation logic is performed on a URL decoded version, which no longer represents the original input. ### Acknowledgements Karel Knibbe
Keycloak prevents certain schemes in redirects, but permits them if a wildcard is appended to the token. This could permit an attacker to submit a specially crafted request leading to XSS or possibly further attacks.
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A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to the token. This issue could allow an attacker to submit a specially crafted request leading to cross-site scripting (XSS) or further attacks. This flaw is the result of an incomplete fix for CVE-2020-10748.
A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to the token. This issue could allow an attacker to submit a specially crafted request leading to cross-site scripting (XSS) or further attacks. This flaw is the result of an incomplete fix for CVE-2020-10748.