CVE-2023-6291: Keycloak services The Redirect_uri Validation Logic Allows Vulnerability
HIGHCVE-2023-6291 is a HIGH (CVSS 7.1) the redirect_uri validation logic allows vulnerability (CWE-20: Improper Input Validation) affecting Keycloak services libraries in the Maven ecosystem. The issue involves the redirect_uri validation logic allows for bypassing explicitly allowed hosts that would otherwise be restricted. Remediation is available by upgrading affected packages to version 23.0.3.
CVE-2023-6291 at a Glance
Security Impact
CVSS: 7.1
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L).
How to Fix CVE-2023-6291
To remediate this vulnerability, upgrade all affected Keycloak services dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>org.keycloak</groupId>
<artifactId>keycloak-services</artifactId>
<version>23.0.3</version>
</dependency>Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:tree -Dincludes=org.keycloakHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2023-6291, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=org.keycloakAnalyze the terminal output to locate any version of Keycloak services in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 23.0.3), your application is affected.
Note: The mvn dependency:tree -Dincludes=org.keycloak command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Keycloak services, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2023-6291 Affected Keycloak services Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
org.keycloak:keycloak-services
|
Maven |
< 23.0.3
|
23.0.3
|
References
Frequently Asked Questions
What is CVE-2023-6291?
Which Keycloak services versions are affected?
What version fixes CVE-2023-6291?
Is keycloak-services affected?
What is the CVSS score of CVE-2023-6291?
What CWE is associated with CVE-2023-6291?
How can I check Maven dependencies for CVE-2023-6291?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-mpwq-j3xf-7m5w",
"modified" : "2024-01-26T20:28:52Z",
"published" : "2023-12-21T18:25:30Z",
"aliases" : [ "CVE-2023-6291" ],
"summary" : "The redirect_uri validation logic allows for bypassing explicitly allowed hosts that would otherwise be restricted",
"details" : "An issue was found in the redirect_uri validation logic that allows for a bypass of otherwise explicitly allowed hosts.\n\nThe 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:y@example.com](https://www%2ekeycloak%2eorg%2fapp%2f:y@example.com/)\" 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.\n\n### Acknowledgements\nKarel Knibbe ",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "org.keycloak:keycloak-services"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "23.0.3"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/keycloak/keycloak/security/advisories/GHSA-mpwq-j3xf-7m5w"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-6291"
}, {
"type" : "WEB",
"url" : "https://github.com/keycloak/keycloak/commit/b2e91105315ccf2c1df549b4f6c5948322cbfd1b"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2023:7854"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2023:7855"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2023:7856"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2023:7857"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2023:7858"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2023:7860"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2023:7861"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/security/cve/CVE-2023-6291"
}, {
"type" : "WEB",
"url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2251407"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/keycloak/keycloak"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-20" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2023-12-21T18:25:30Z",
"nvd_published_at" : "2024-01-26T15:15:08Z"
}
}