ghsa-mpwq-j3xf-7m5w
Vulnerability from github
Published
2023-12-21 18:25
Modified
2024-01-26 20:28
Severity ?
7.1 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
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.

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: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 This happens because the validation logic is performed on a URL decoded version, which no longer represents the original input.

Acknowledgements

Karel Knibbe

Show details on source website

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{
   affected: [
      {
         package: {
            ecosystem: "Maven",
            name: "org.keycloak:keycloak-services",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "0",
                  },
                  {
                     fixed: "23.0.3",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
   ],
   aliases: [
      "CVE-2023-6291",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-20",
      ],
      github_reviewed: true,
      github_reviewed_at: "2023-12-21T18:25:30Z",
      nvd_published_at: "2024-01-26T15:15:08Z",
      severity: "HIGH",
   },
   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 This happens because the validation logic is performed on a URL decoded version, which no longer represents the original input.\n\n### Acknowledgements\nKarel Knibbe ",
   id: "GHSA-mpwq-j3xf-7m5w",
   modified: "2024-01-26T20:28:52Z",
   published: "2023-12-21T18:25:30Z",
   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",
      },
   ],
   schema_version: "1.4.0",
   severity: [
      {
         score: "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L",
         type: "CVSS_V3",
      },
   ],
   summary: "The redirect_uri validation logic allows for bypassing explicitly allowed hosts that would otherwise be restricted",
}


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