gsd-2021-32813
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
Traefik is an HTTP reverse proxy and load balancer. Prior to version 2.4.13, there exists a potential header vulnerability in Traefik's handling of the Connection header. Active exploitation of this issue is unlikely, as it requires that a removed header would lead to a privilege escalation, however, the Traefik team has addressed this issue to prevent any potential abuse. If one has a chain of Traefik middlewares, and one of them sets a request header, then sending a request with a certain Connection header will cause it to be removed before the request is sent. In this case, the backend does not see the request header. A patch is available in version 2.4.13. There are no known workarounds aside from upgrading.
Aliases
Aliases
CVE-2021-32813


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-32813",
    "description": "Traefik is an HTTP reverse proxy and load balancer. Prior to version 2.4.13, there exists a potential header vulnerability in Traefik\u0027s handling of the Connection header. Active exploitation of this issue is unlikely, as it requires that a removed header would lead to a privilege escalation, however, the Traefik team has addressed this issue to prevent any potential abuse. If one has a chain of Traefik middlewares, and one of them sets a request header, then sending a request with a certain Connection header will cause it to be removed before the request is sent. In this case, the backend does not see the request header. A patch is available in version 2.4.13. There are no known workarounds aside from upgrading.",
    "id": "GSD-2021-32813",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-32813.html",
      "https://security.archlinux.org/CVE-2021-32813"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-32813"
      ],
      "details": "Traefik is an HTTP reverse proxy and load balancer. Prior to version 2.4.13, there exists a potential header vulnerability in Traefik\u0027s handling of the Connection header. Active exploitation of this issue is unlikely, as it requires that a removed header would lead to a privilege escalation, however, the Traefik team has addressed this issue to prevent any potential abuse. If one has a chain of Traefik middlewares, and one of them sets a request header, then sending a request with a certain Connection header will cause it to be removed before the request is sent. In this case, the backend does not see the request header. A patch is available in version 2.4.13. There are no known workarounds aside from upgrading.",
      "id": "GSD-2021-32813",
      "modified": "2023-12-13T01:23:08.835947Z",
      "schema_version": "1.4.0"
    }
  },
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        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-32813",
        "STATE": "PUBLIC",
        "TITLE": "Drop Headers via Malicious Connection Header "
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "traefik",
                    "version": {
                      "version_data": [
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                          "version_value": "\u003c 2.4.13"
                        },
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                          "version_value": "\u003c= 1.7.30"
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            "value": "Traefik is an HTTP reverse proxy and load balancer. Prior to version 2.4.13, there exists a potential header vulnerability in Traefik\u0027s handling of the Connection header. Active exploitation of this issue is unlikely, as it requires that a removed header would lead to a privilege escalation, however, the Traefik team has addressed this issue to prevent any potential abuse. If one has a chain of Traefik middlewares, and one of them sets a request header, then sending a request with a certain Connection header will cause it to be removed before the request is sent. In this case, the backend does not see the request header. A patch is available in version 2.4.13. There are no known workarounds aside from upgrading."
          }
        ]
      },
      "impact": {
        "cvss": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
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          },
          {
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          },
          {
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            "url": "https://github.com/traefik/traefik/releases/tag/v2.4.13"
          }
        ]
      },
      "source": {
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        "discovery": "UNKNOWN"
      }
    },
    "gitlab.com": {
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        {
          "affected_range": "\u003c=1.7.30",
          "affected_versions": "All versions up to 1.7.30",
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          "cwe_ids": [
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          ],
          "date": "2021-08-31",
          "description": "Traefik is an HTTP reverse proxy and load balancer. Prior to version 2.4.13, there exists a potential header vulnerability in Traefik\u0027s handling of the Connection header. Active exploitation of this issue is unlikely, as it requires that a removed header would lead to a privilege escalation, however, the Traefik team has addressed this issue to prevent any potential abuse. If one has a chain of Traefik middlewares, and one of them sets a request header, then sending a request with a certain Connection header will cause it to be removed before the request is sent. In this case, the backend does not see the request header. A patch is available in version 2.4.13. There are no known workarounds aside from upgrading.",
          "fixed_versions": [],
          "identifier": "CVE-2021-32813",
          "identifiers": [
            "GHSA-m697-4v8f-55qg",
            "CVE-2021-32813"
          ],
          "not_impacted": "",
          "package_slug": "go/github.com/traefik/traefik",
          "pubdate": "2021-08-05",
          "solution": "Unfortunately, there is no solution available yet.",
          "title": "Improper Control of Dynamically-Managed Code Resources",
          "urls": [
            "https://github.com/traefik/traefik/security/advisories/GHSA-m697-4v8f-55qg",
            "https://nvd.nist.gov/vuln/detail/CVE-2021-32813",
            "https://github.com/traefik/traefik/pull/8319/commits/cbaf86a93014a969b8accf39301932c17d0d73f9",
            "https://github.com/traefik/traefik/releases/tag/v2.4.13",
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          "uuid": "01b072b1-3152-4c0c-88d4-2077ce44036e"
        },
        {
          "affected_range": "\u003c2.4.13",
          "affected_versions": "All versions before 2.4.13",
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          "cvss_v3": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-913",
            "CWE-937"
          ],
          "date": "2021-08-31",
          "description": "Traefik is an HTTP reverse proxy and load balancer. Prior to version 2.4.13, there exists a potential header vulnerability in Traefik\u0027s handling of the Connection header. Active exploitation of this issue is unlikely, as it requires that a removed header would lead to a privilege escalation, however, the Traefik team has addressed this issue to prevent any potential abuse. If one has a chain of Traefik middlewares, and one of them sets a request header, then sending a request with a certain Connection header will cause it to be removed before the request is sent. In this case, the backend does not see the request header. A patch is available in version 2.4.13. There are no known workarounds aside from upgrading.",
          "fixed_versions": [
            "2.4.13"
          ],
          "identifier": "CVE-2021-32813",
          "identifiers": [
            "GHSA-m697-4v8f-55qg",
            "CVE-2021-32813"
          ],
          "not_impacted": "All versions starting from 2.4.13",
          "package_slug": "go/github.com/traefik/traefik/v2",
          "pubdate": "2021-08-05",
          "solution": "Upgrade to version 2.4.13 or above.",
          "title": "Improper Control of Dynamically-Managed Code Resources",
          "urls": [
            "https://github.com/traefik/traefik/security/advisories/GHSA-m697-4v8f-55qg",
            "https://nvd.nist.gov/vuln/detail/CVE-2021-32813",
            "https://github.com/traefik/traefik/pull/8319/commits/cbaf86a93014a969b8accf39301932c17d0d73f9",
            "https://github.com/traefik/traefik/releases/tag/v2.4.13",
            "https://github.com/advisories/GHSA-m697-4v8f-55qg"
          ],
          "uuid": "57e05dea-9834-4763-a993-8acb42435174"
        }
      ]
    },
    "nvd.nist.gov": {
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            "cpe_match": [
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                "cpe23Uri": "cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*",
                "cpe_name": [],
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 6.8,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
            "version": "2.0"
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          "exploitabilityScore": 8.6,
          "impactScore": 6.4,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
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            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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          "exploitabilityScore": 2.2,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2021-08-11T23:40Z",
      "publishedDate": "2021-08-03T23:15Z"
    }
  }
}


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