ghsa-6qq8-5wq3-86rp
Vulnerability from github
Published
2022-02-11 23:19
Modified
2022-08-04 20:56
Severity ?
6.1 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N
Summary
Traefik vulnerable to Open Redirect via handling of X-Forwarded-Prefix header
Details

Summary

There exists a potential open redirect vulnerability in Traefik's handling of the X-Forwarded-Prefix header. Active Exploitation of this issue is unlikely as it would require active header injection, however the Traefik team addressed this issue nonetheless to prevent abuse in e.g. cache poisoning scenarios.

Details

The Traefik API dashboard component doesn't validate that the value of the header X-Forwarded-Prefix is a site relative path and will redirect to any header provided URI.

e.g.

$ curl --header 'Host:traefik.localhost' --header 'X-Forwarded-Prefix:https://example.org' 'http://localhost:8081' <a href="https://example.org/dashboard/">Found</a>.`

Impact

A successful exploitation of an open redirect can be used to entice victims to disclose sensitive information.

Workarounds

By using the headers middleware, the request header X-Forwarded-Prefix value can be overridden by the value . (dot)

  • https://docs.traefik.io/v2.2/middlewares/headers/#customrequestheaders
  • https://docs.traefik.io/v1.7/basics/#custom-headers

For more information

If you have any questions or comments about this advisory, open an issue in Traefik.

Credit

This issue was found by the GitHub Application Security Team and reported on behalf of the GHAS by the GitHub Security Lab Team.

Show details on source website

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{
   affected: [
      {
         package: {
            ecosystem: "Go",
            name: "github.com/traefik/traefik",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "1.5.0-rc5",
                  },
                  {
                     fixed: "1.7.26",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
      {
         database_specific: {
            last_known_affected_version_range: "< 2.2.8",
         },
         package: {
            ecosystem: "Go",
            name: "github.com/traefik/traefik/v2",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "0",
                  },
                  {
                     fixed: "2.3.0-rc6",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
      {
         package: {
            ecosystem: "Go",
            name: "github.com/containous/traefik",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "1.5.0-rc5",
                  },
                  {
                     fixed: "1.7.26",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
      {
         package: {
            ecosystem: "Go",
            name: "github.com/containous/traefik/v2",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "0",
                  },
                  {
                     fixed: "2.2.8",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
      {
         database_specific: {
            last_known_affected_version_range: "< 2.3.0-rc3",
         },
         package: {
            ecosystem: "Go",
            name: "github.com/traefik/traefik/v2",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "2.3.0-rc1",
                  },
                  {
                     fixed: "2.3.0-rc6",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
      {
         package: {
            ecosystem: "Go",
            name: "github.com/containous/traefik/v2",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "2.3.0-rc1",
                  },
                  {
                     fixed: "2.3.0-rc3",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
      {
         package: {
            ecosystem: "Go",
            name: "github.com/traefik/traefik/api",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "1.5.0-rc5",
                  },
                  {
                     fixed: "1.7.26",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
      {
         database_specific: {
            last_known_affected_version_range: "< 2.2.8",
         },
         package: {
            ecosystem: "Go",
            name: "github.com/traefik/traefik/v2/pkg/api",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "0",
                  },
                  {
                     fixed: "2.3.0-rc6",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
      {
         database_specific: {
            last_known_affected_version_range: "< 2.3.0-rc3",
         },
         package: {
            ecosystem: "Go",
            name: "github.com/traefik/traefik/v2/pkg/api",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "2.3.0-rc1",
                  },
                  {
                     fixed: "2.3.0-rc6",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
      {
         package: {
            ecosystem: "Go",
            name: "github.com/containous/traefik/api",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "1.5.0-rc5",
                  },
                  {
                     fixed: "1.7.26",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
      {
         package: {
            ecosystem: "Go",
            name: "github.com/containous/traefik/v2/pkg/api",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "0",
                  },
                  {
                     fixed: "2.2.8",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
      {
         package: {
            ecosystem: "Go",
            name: "github.com/containous/traefik/v2/pkg/api",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "2.3.0-rc1",
                  },
                  {
                     fixed: "2.3.0-rc3",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
   ],
   aliases: [
      "CVE-2020-15129",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-601",
      ],
      github_reviewed: true,
      github_reviewed_at: "2021-05-24T18:21:00Z",
      nvd_published_at: "2020-07-30T16:15:00Z",
      severity: "MODERATE",
   },
   details: "## Summary\n\nThere exists a potential open redirect vulnerability in Traefik's handling of the `X-Forwarded-Prefix` header. Active Exploitation of this issue is unlikely as it would require active header injection, however the Traefik team addressed this issue nonetheless to prevent abuse in e.g. cache poisoning scenarios.\n\n## Details\n\nThe Traefik API dashboard component doesn't validate that the value of the header `X-Forwarded-Prefix` is a site relative path and will redirect to any header provided URI.\n\ne.g.\n\n```\n$ curl --header 'Host:traefik.localhost' --header 'X-Forwarded-Prefix:https://example.org' 'http://localhost:8081'\n<a href=\"https://example.org/dashboard/\">Found</a>.`\n```\n\n### Impact\nA successful exploitation of an open redirect can be used to entice victims to disclose sensitive information.\n\n### Workarounds\n\nBy using the `headers` middleware, the request header `X-Forwarded-Prefix` value can be overridden by the value `.` (dot)\n\n- https://docs.traefik.io/v2.2/middlewares/headers/#customrequestheaders\n- https://docs.traefik.io/v1.7/basics/#custom-headers\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in [Traefik](https://github.com/containous/traefik/issues).\n\n## Credit\n\nThis issue was found by the GitHub Application Security Team and reported on behalf of the GHAS by the GitHub Security Lab Team.",
   id: "GHSA-6qq8-5wq3-86rp",
   modified: "2022-08-04T20:56:21Z",
   published: "2022-02-11T23:19:21Z",
   references: [
      {
         type: "WEB",
         url: "https://github.com/containous/traefik/security/advisories/GHSA-6qq8-5wq3-86rp",
      },
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2020-15129",
      },
      {
         type: "WEB",
         url: "https://github.com/containous/traefik/pull/7109",
      },
      {
         type: "WEB",
         url: "https://github.com/containous/traefik/commit/cfa04c300c5db95ae8a52c31a9d973b6dd9c2254",
      },
      {
         type: "WEB",
         url: "https://github.com/containous/traefik/commit/e63db782c11c7b8bfce30be4c902e7ef8f9f33d2",
      },
      {
         type: "WEB",
         url: "https://github.com/traefik/traefik/commit/e2c5f3712f68993de8ed3cb30da9ec0aa11acb09",
      },
      {
         type: "WEB",
         url: "https://github.com/containous/traefik/releases/tag/v1.7.26",
      },
      {
         type: "WEB",
         url: "https://github.com/containous/traefik/releases/tag/v2.2.8",
      },
      {
         type: "WEB",
         url: "https://github.com/containous/traefik/releases/tag/v2.3.0-rc3",
      },
      {
         type: "PACKAGE",
         url: "https://github.com/traefik/traefik",
      },
   ],
   schema_version: "1.4.0",
   severity: [
      {
         score: "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N",
         type: "CVSS_V3",
      },
   ],
   summary: "Traefik vulnerable to Open Redirect via handling of X-Forwarded-Prefix header",
}


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