Vulnerabilites related to mitmproxy - mitmproxy
Vulnerability from fkie_nvd
Published
2021-09-16 15:15
Modified
2024-11-21 06:18
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
mitmproxy is an interactive, SSL/TLS-capable intercepting proxy. In mitmproxy 7.0.2 and below, a malicious client or server is able to perform HTTP request smuggling attacks through mitmproxy. This means that a malicious client/server could smuggle a request/response through mitmproxy as part of another request/response's HTTP message body. While a smuggled request is still captured as part of another request's body, it does not appear in the request list and does not go through the usual mitmproxy event hooks, where users may have implemented custom access control checks or input sanitization. Unless one uses mitmproxy to protect an HTTP/1 service, no action is required. The vulnerability has been fixed in mitmproxy 7.0.3 and above.
References
security-advisories@github.comhttps://github.com/mitmproxy/mitmproxy/security/advisories/GHSA-22gh-3r9q-xf38Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/mitmproxy/mitmproxy/security/advisories/GHSA-22gh-3r9q-xf38Third Party Advisory
Impacted products
Vendor Product Version
mitmproxy mitmproxy *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mitmproxy:mitmproxy:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B8BF4DAA-4BE5-4F62-9B5C-A230FB0F0832",
              "versionEndIncluding": "7.0.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "mitmproxy is an interactive, SSL/TLS-capable intercepting proxy. In mitmproxy 7.0.2 and below, a malicious client or server is able to perform HTTP request smuggling attacks through mitmproxy. This means that a malicious client/server could smuggle a request/response through mitmproxy as part of another request/response\u0027s HTTP message body. While a smuggled request is still captured as part of another request\u0027s body, it does not appear in the request list and does not go through the usual mitmproxy event hooks, where users may have implemented custom access control checks or input sanitization. Unless one uses mitmproxy to protect an HTTP/1 service, no action is required. The vulnerability has been fixed in mitmproxy 7.0.3 and above."
    },
    {
      "lang": "es",
      "value": "mitmproxy es un proxy interactivo con capacidad de interceptaci\u00f3n SSL/TLS. En mitmproxy versiones 7.0.2 y por debajo, un cliente o servidor malicioso es capaz de llevar a cabo ataques de contrabando de peticiones HTTP mediante mitmproxy. Esto significa que un cliente/servidor malicioso podr\u00eda pasar de contrabando una petici\u00f3n/respuesta mediante mitmproxy como parte del cuerpo del mensaje HTTP de otra petici\u00f3n/respuesta. Mientras que una petici\u00f3n de contrabando sigue siendo capturada como parte del cuerpo de otra petici\u00f3n, no aparece en la lista de peticiones y no pasa por los ganchos de eventos habituales de mitmproxy, donde los usuarios pueden haber implementado comprobaciones de control de acceso personalizadas o saneo de entradas. A menos que se use mitmproxy para proteger un servicio HTTP/1, no es requerida ninguna acci\u00f3n. La vulnerabilidad ha sido corregida en mitmproxy versiones 7.0.3 y superiores"
    }
  ],
  "id": "CVE-2021-39214",
  "lastModified": "2024-11-21T06:18:55.243",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
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      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
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          "confidentialityImpact": "HIGH",
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          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-09-16T15:15:07.460",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/mitmproxy/mitmproxy/security/advisories/GHSA-22gh-3r9q-xf38"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/mitmproxy/mitmproxy/security/advisories/GHSA-22gh-3r9q-xf38"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-444"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}

Vulnerability from fkie_nvd
Published
2022-03-21 19:15
Modified
2024-11-21 06:51
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
mitmproxy is an interactive, SSL/TLS-capable intercepting proxy. In mitmproxy 7.0.4 and below, a malicious client or server is able to perform HTTP request smuggling attacks through mitmproxy. This means that a malicious client/server could smuggle a request/response through mitmproxy as part of another request/response's HTTP message body. While mitmproxy would only see one request, the target server would see multiple requests. A smuggled request is still captured as part of another request's body, but it does not appear in the request list and does not go through the usual mitmproxy event hooks, where users may have implemented custom access control checks or input sanitization. Unless mitmproxy is used to protect an HTTP/1 service, no action is required. The vulnerability has been fixed in mitmproxy 8.0.0 and above. There are currently no known workarounds.
References
security-advisories@github.comhttps://github.com/mitmproxy/mitmproxy/commit/b06fb6d157087d526bd02e7aadbe37c56865c71bPatch, Third Party Advisory
security-advisories@github.comhttps://github.com/mitmproxy/mitmproxy/security/advisories/GHSA-gcx2-gvj7-pxv3Third Party Advisory
security-advisories@github.comhttps://mitmproxy.org/posts/releases/mitmproxy8/Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/mitmproxy/mitmproxy/commit/b06fb6d157087d526bd02e7aadbe37c56865c71bPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/mitmproxy/mitmproxy/security/advisories/GHSA-gcx2-gvj7-pxv3Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://mitmproxy.org/posts/releases/mitmproxy8/Release Notes, Vendor Advisory
Impacted products
Vendor Product Version
mitmproxy mitmproxy *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mitmproxy:mitmproxy:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "41ABE70A-F0A7-4F97-A8F1-8B8D1BDD5663",
              "versionEndIncluding": "7.0.4",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "mitmproxy is an interactive, SSL/TLS-capable intercepting proxy. In mitmproxy 7.0.4 and below, a malicious client or server is able to perform HTTP request smuggling attacks through mitmproxy. This means that a malicious client/server could smuggle a request/response through mitmproxy as part of another request/response\u0027s HTTP message body. While mitmproxy would only see one request, the target server would see multiple requests. A smuggled request is still captured as part of another request\u0027s body, but it does not appear in the request list and does not go through the usual mitmproxy event hooks, where users may have implemented custom access control checks or input sanitization. Unless mitmproxy is used to protect an HTTP/1 service, no action is required. The vulnerability has been fixed in mitmproxy 8.0.0 and above. There are currently no known workarounds."
    },
    {
      "lang": "es",
      "value": "mitmproxy es un proxy interactivo con capacidad de interceptaci\u00f3n SSL/TLS. En mitmproxy versiones 7.0.4 y anteriores, un cliente o servidor malicioso puede llevar a cabo ataques de contrabando de peticiones HTTP mediante mitmproxy. Esto significa que un cliente/servidor malicioso podr\u00eda pasar de contrabando una petici\u00f3n/respuesta mediante mitmproxy como parte del cuerpo del mensaje HTTP de otra petici\u00f3n/respuesta. Mientras que mitmproxy s\u00f3lo ver\u00eda una petici\u00f3n, el servidor de destino ver\u00eda m\u00faltiples peticiones. Una petici\u00f3n contrabandeada sigue siendo capturada como parte del cuerpo de otra petici\u00f3n, pero no aparece en la lista de peticiones y no pasa por los ganchos de eventos habituales de mitmproxy, donde los usuarios pueden haber implementado comprobaciones de control de acceso personalizadas o saneo de entradas. A menos que mitmproxy sea usado para proteger un servicio HTTP/1, no es requerida ninguna acci\u00f3n. La vulnerabilidad ha sido corregida en mitmproxy versiones 8.0.0 y superiores. Actualmente no se presentan medidas de mitigaci\u00f3n conocidas"
    }
  ],
  "id": "CVE-2022-24766",
  "lastModified": "2024-11-21T06:51:03.097",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
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          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
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          "privilegesRequired": "NONE",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
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        "source": "nvd@nist.gov",
        "type": "Primary"
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    ]
  },
  "published": "2022-03-21T19:15:11.613",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/mitmproxy/mitmproxy/commit/b06fb6d157087d526bd02e7aadbe37c56865c71b"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/mitmproxy/mitmproxy/security/advisories/GHSA-gcx2-gvj7-pxv3"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://mitmproxy.org/posts/releases/mitmproxy8/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/mitmproxy/mitmproxy/commit/b06fb6d157087d526bd02e7aadbe37c56865c71b"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/mitmproxy/mitmproxy/security/advisories/GHSA-gcx2-gvj7-pxv3"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://mitmproxy.org/posts/releases/mitmproxy8/"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-444"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-444"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

Vulnerability from fkie_nvd
Published
2018-07-22 18:29
Modified
2024-11-21 03:49
Severity ?
8.8 (High) - CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Summary
mitmweb in mitmproxy v4.0.3 allows DNS Rebinding attacks, related to tools/web/app.py.
References
cve@mitre.orghttps://github.com/mitmproxy/mitmproxy/issues/3234Exploit, Third Party Advisory
cve@mitre.orghttps://github.com/mitmproxy/mitmproxy/pull/3243Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/mitmproxy/mitmproxy/issues/3234Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/mitmproxy/mitmproxy/pull/3243Third Party Advisory
Impacted products
Vendor Product Version
mitmproxy mitmproxy 4.0.3


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mitmproxy:mitmproxy:4.0.3:*:*:*:*:*:*:*",
              "matchCriteriaId": "D699F2F4-D9F9-48C7-8BBA-B7A4CB5A11BA",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "mitmweb in mitmproxy v4.0.3 allows DNS Rebinding attacks, related to tools/web/app.py."
    },
    {
      "lang": "es",
      "value": "mitmweb en mitmproxy v4.0.3 permite ataques de DNS Rebinding. Esto est\u00e1 relacionado con tools/web/app.py."
    }
  ],
  "id": "CVE-2018-14505",
  "lastModified": "2024-11-21T03:49:13.043",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
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      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.0"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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    ]
  },
  "published": "2018-07-22T18:29:00.223",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/mitmproxy/mitmproxy/issues/3234"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/mitmproxy/mitmproxy/pull/3243"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/mitmproxy/mitmproxy/issues/3234"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/mitmproxy/mitmproxy/pull/3243"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2025-23217 (GCVE-0-2025-23217)
Vulnerability from cvelistv5
Published
2025-02-06 17:32
Modified
2025-02-12 19:51
Severity ?
8.2 (High) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-288 - Authentication Bypass Using an Alternate Path or Channel
  • CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
Summary
mitmproxy is a interactive TLS-capable intercepting HTTP proxy for penetration testers and software developers and mitmweb is a web-based interface for mitmproxy. In mitmweb 11.1.1 and below, a malicious client can use mitmweb's proxy server (bound to `*:8080` by default) to access mitmweb's internal API (bound to `127.0.0.1:8081` by default). In other words, while the cannot access the API directly, they can access the API through the proxy. An attacker may be able to escalate this SSRF-style access to remote code execution. The mitmproxy and mitmdump tools are unaffected. Only mitmweb is affected. This vulnerability has been fixed in mitmproxy 11.1.2 and above. Users are advised to upgrade. There are no known workarounds for this vulnerability.
References
Impacted products
Vendor Product Version
mitmproxy mitmproxy Version: < 11.1.2
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
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                "options": [
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                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-06T19:15:53.246425Z",
                "version": "2.0.3"
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CVE-2018-14505 (GCVE-0-2018-14505)
Vulnerability from cvelistv5
Published
2018-07-22 18:00
Modified
2024-08-05 09:29
Severity ?
CWE
  • n/a
Summary
mitmweb in mitmproxy v4.0.3 allows DNS Rebinding attacks, related to tools/web/app.py.
References
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

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CVE-2022-24766 (GCVE-0-2022-24766)
Vulnerability from cvelistv5
Published
2022-03-21 18:50
Modified
2025-04-23 18:45
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
Summary
mitmproxy is an interactive, SSL/TLS-capable intercepting proxy. In mitmproxy 7.0.4 and below, a malicious client or server is able to perform HTTP request smuggling attacks through mitmproxy. This means that a malicious client/server could smuggle a request/response through mitmproxy as part of another request/response's HTTP message body. While mitmproxy would only see one request, the target server would see multiple requests. A smuggled request is still captured as part of another request's body, but it does not appear in the request list and does not go through the usual mitmproxy event hooks, where users may have implemented custom access control checks or input sanitization. Unless mitmproxy is used to protect an HTTP/1 service, no action is required. The vulnerability has been fixed in mitmproxy 8.0.0 and above. There are currently no known workarounds.
References
Impacted products
Vendor Product Version
mitmproxy mitmproxy Version: <= 7.0.4
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2021-39214 (GCVE-0-2021-39214)
Vulnerability from cvelistv5
Published
2021-09-16 15:10
Modified
2024-08-04 01:58
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
Summary
mitmproxy is an interactive, SSL/TLS-capable intercepting proxy. In mitmproxy 7.0.2 and below, a malicious client or server is able to perform HTTP request smuggling attacks through mitmproxy. This means that a malicious client/server could smuggle a request/response through mitmproxy as part of another request/response's HTTP message body. While a smuggled request is still captured as part of another request's body, it does not appear in the request list and does not go through the usual mitmproxy event hooks, where users may have implemented custom access control checks or input sanitization. Unless one uses mitmproxy to protect an HTTP/1 service, no action is required. The vulnerability has been fixed in mitmproxy 7.0.3 and above.
References
Impacted products
Vendor Product Version
mitmproxy mitmproxy Version: < 7.0.3
 Create a notification for this product.
Show details on NVD website

To clipboard 

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        "description": {
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            {
              "lang": "eng",
              "value": "mitmproxy is an interactive, SSL/TLS-capable intercepting proxy. In mitmproxy 7.0.2 and below, a malicious client or server is able to perform HTTP request smuggling attacks through mitmproxy. This means that a malicious client/server could smuggle a request/response through mitmproxy as part of another request/response\u0027s HTTP message body. While a smuggled request is still captured as part of another request\u0027s body, it does not appear in the request list and does not go through the usual mitmproxy event hooks, where users may have implemented custom access control checks or input sanitization. Unless one uses mitmproxy to protect an HTTP/1 service, no action is required. The vulnerability has been fixed in mitmproxy 7.0.3 and above."
            }
          ]
        },
        "impact": {
          "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-444: Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request Smuggling\u0027)"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/mitmproxy/mitmproxy/security/advisories/GHSA-22gh-3r9q-xf38",
              "refsource": "CONFIRM",
              "url": "https://github.com/mitmproxy/mitmproxy/security/advisories/GHSA-22gh-3r9q-xf38"
            }
          ]
        },
        "source": {
          "advisory": "GHSA-22gh-3r9q-xf38",
          "discovery": "UNKNOWN"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2021-39214",
    "datePublished": "2021-09-16T15:10:10",
    "dateReserved": "2021-08-16T00:00:00",
    "dateUpdated": "2024-08-04T01:58:18.196Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}