ghsa-8g85-whqh-cr2f
Vulnerability from github
Published
2023-12-05 18:12
Modified
2024-11-19 16:25
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Traefik vulnerable to potential DDoS via ACME HTTPChallenge
Details

Impact

There is a potential vulnerability in Traefik managing the ACME HTTP challenge.

When Traefik is configured to use the HTTPChallenge to generate and renew the Let's Encrypt TLS certificates, the delay authorized to solve the challenge (50 seconds) can be exploited by attackers (slowloris attack).

Patches

  • https://github.com/traefik/traefik/releases/tag/v2.10.6
  • https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5

Workarounds

Replace the HTTPChallenge with the TLSChallenge or the DNSChallenge.

For more information

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

Show details on source website

To clipboard 

{
   affected: [
      {
         package: {
            ecosystem: "Go",
            name: "github.com/traefik/traefik/v2",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "0",
                  },
                  {
                     fixed: "2.10.6",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
      {
         package: {
            ecosystem: "Go",
            name: "github.com/traefik/traefik/v3",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "0",
                  },
                  {
                     fixed: "3.0.0-beta5",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
   ],
   aliases: [
      "CVE-2023-47124",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-400",
         "CWE-772",
      ],
      github_reviewed: true,
      github_reviewed_at: "2023-12-05T18:12:37Z",
      nvd_published_at: "2023-12-04T21:15:33Z",
      severity: "MODERATE",
   },
   details: "## Impact\n\nThere is a potential vulnerability in Traefik managing the ACME HTTP challenge.\n\nWhen Traefik is configured to use the [HTTPChallenge](https://doc.traefik.io/traefik/https/acme/#httpchallenge) to generate and renew the Let's Encrypt TLS certificates, the delay authorized to solve the challenge (50 seconds) can be exploited by attackers ([slowloris attack](https://www.cloudflare.com/learning/ddos/ddos-attack-tools/slowloris/)).\n \n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.10.6\n- https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5\n\n## Workarounds\n\nReplace the HTTPChallenge with the [TLSChallenge](https://doc.traefik.io/traefik/https/acme/#tlschallenge) or the [DNSChallenge](https://doc.traefik.io/traefik/https/acme/#dnschallenge).\n\n## For more information\n\nIf you have any questions or comments about this advisory, please [open an issue](https://github.com/traefik/traefik/issues).",
   id: "GHSA-8g85-whqh-cr2f",
   modified: "2024-11-19T16:25:35Z",
   published: "2023-12-05T18:12:37Z",
   references: [
      {
         type: "WEB",
         url: "https://github.com/traefik/traefik/security/advisories/GHSA-8g85-whqh-cr2f",
      },
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2023-47124",
      },
      {
         type: "WEB",
         url: "https://doc.traefik.io/traefik/https/acme/#dnschallenge",
      },
      {
         type: "WEB",
         url: "https://doc.traefik.io/traefik/https/acme/#httpchallenge",
      },
      {
         type: "WEB",
         url: "https://doc.traefik.io/traefik/https/acme/#tlschallenge",
      },
      {
         type: "PACKAGE",
         url: "https://github.com/traefik/traefik",
      },
      {
         type: "WEB",
         url: "https://github.com/traefik/traefik/releases/tag/v2.10.6",
      },
      {
         type: "WEB",
         url: "https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5",
      },
      {
         type: "WEB",
         url: "https://www.cloudflare.com/learning/ddos/ddos-attack-tools/slowloris",
      },
   ],
   schema_version: "1.4.0",
   severity: [
      {
         score: "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
         type: "CVSS_V3",
      },
   ],
   summary: "Traefik vulnerable to potential DDoS via ACME HTTPChallenge",
}


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