CVE-2024-1135 (GCVE-0-2024-1135)

Vulnerability from cvelistv5 – Published: 2024-04-16 00:00 – Updated: 2025-02-13 17:27
VLAI
Title
HTTP Request Smuggling in benoitc/gunicorn
Summary
Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, attackers can bypass security restrictions and access restricted endpoints. This issue is due to Gunicorn's handling of Transfer-Encoding headers, where it incorrectly processes requests with multiple, conflicting Transfer-Encoding headers, treating them as chunked regardless of the final encoding specified. This vulnerability allows for a range of attacks including cache poisoning, session manipulation, and data exposure.
Severity
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-04-19 17:32 UTC
CWE
  • CWE-444 - Inconsistent Interpretation of HTTP Requests
Assigner
References
Impacted products
Vendor Product Version CPE status
benoitc benoitc/gunicorn Affected: unspecified , ≤ latest (custom)
guessed Create a notification for this product.
benoitc gunicorn Affected: *
    cpe:2.3:a:benoitc:gunicorn:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:benoitc:gunicorn:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "gunicorn",
            "vendor": "benoitc",
            "versions": [
              {
                "status": "affected",
                "version": "*"
              }
            ]
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-1135",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-04-19T17:32:23.631972Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:59:56.871Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-12-20T07:02:46.961Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://huntr.com/bounties/22158e34-cfd5-41ad-97e0-a780773d96c1"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00027.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2024/12/msg00018.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "benoitc/gunicorn",
          "vendor": "benoitc",
          "versions": [
            {
              "lessThanOrEqual": "latest",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, attackers can bypass security restrictions and access restricted endpoints. This issue is due to Gunicorn\u0027s handling of Transfer-Encoding headers, where it incorrectly processes requests with multiple, conflicting Transfer-Encoding headers, treating them as chunked regardless of the final encoding specified. This vulnerability allows for a range of attacks including cache poisoning, session manipulation, and data exposure."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-444",
              "description": "CWE-444 Inconsistent Interpretation of HTTP Requests",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-06-30T23:06:05.937Z",
        "orgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
        "shortName": "@huntr_ai"
      },
      "references": [
        {
          "url": "https://huntr.com/bounties/22158e34-cfd5-41ad-97e0-a780773d96c1"
        },
        {
          "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00027.html"
        }
      ],
      "source": {
        "advisory": "22158e34-cfd5-41ad-97e0-a780773d96c1",
        "discovery": "EXTERNAL"
      },
      "title": "HTTP Request Smuggling in benoitc/gunicorn"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
    "assignerShortName": "@huntr_ai",
    "cveId": "CVE-2024-1135",
    "datePublished": "2024-04-16T00:00:14.938Z",
    "dateReserved": "2024-01-31T18:15:14.296Z",
    "dateUpdated": "2025-02-13T17:27:34.444Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2024-1135",
      "date": "2026-09-21",
      "epss": "0.02996",
      "percentile": "0.867"
    },
    "fkie_nvd": {
      "descriptions": [
        {
          "lang": "en",
          "value": "Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, attackers can bypass security restrictions and access restricted endpoints. This issue is due to Gunicorn\u0027s handling of Transfer-Encoding headers, where it incorrectly processes requests with multiple, conflicting Transfer-Encoding headers, treating them as chunked regardless of the final encoding specified. This vulnerability allows for a range of attacks including cache poisoning, session manipulation, and data exposure."
        },
        {
          "lang": "es",
          "value": "Gunicorn no puede validar correctamente los encabezados Transfer-Encoding, lo que genera vulnerabilidades de contrabando de solicitudes HTTP (HRS). Al manipular solicitudes con encabezados Transfer-Encoding conflictivos, los atacantes pueden eludir las restricciones de seguridad y acceder a endpoints restringidos. Este problema se debe al manejo que hace Gunicorn de los encabezados Transfer-Encoding, donde procesa incorrectamente solicitudes con m\u00faltiples encabezados Transfer-Encoding conflictivos, trat\u00e1ndolos como fragmentados independientemente de la codificaci\u00f3n final especificada. Esta vulnerabilidad permite una variedad de ataques que incluyen envenenamiento de cach\u00e9, manipulaci\u00f3n de sesiones y exposici\u00f3n de datos."
        }
      ],
      "id": "CVE-2024-1135",
      "lastModified": "2024-12-20T07:15:12.590",
      "metrics": {
        "cvssMetricV30": [
          {
            "cvssData": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
              "version": "3.0"
            },
            "exploitabilityScore": 3.9,
            "impactScore": 3.6,
            "source": "security@huntr.dev",
            "type": "Secondary"
          }
        ]
      },
      "published": "2024-04-16T00:15:07.797",
      "references": [
        {
          "source": "security@huntr.dev",
          "url": "https://huntr.com/bounties/22158e34-cfd5-41ad-97e0-a780773d96c1"
        },
        {
          "source": "security@huntr.dev",
          "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00027.html"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://huntr.com/bounties/22158e34-cfd5-41ad-97e0-a780773d96c1"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00027.html"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://lists.debian.org/debian-lts-announce/2024/12/msg00018.html"
        }
      ],
      "sourceIdentifier": "security@huntr.dev",
      "vulnStatus": "Awaiting Analysis",
      "weaknesses": [
        {
          "description": [
            {
              "lang": "en",
              "value": "CWE-444"
            }
          ],
          "source": "security@huntr.dev",
          "type": "Secondary"
        }
      ]
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "benoitc/gunicorn",
                "vendor": "benoitc",
                "versions": [
                  {
                    "lessThanOrEqual": "latest",
                    "status": "affected",
                    "version": "unspecified",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "security@huntr.dev"
          },
          {
            "affectedData": [
              {
                "cpes": [
                  "cpe:2.3:a:benoitc:gunicorn:*:*:*:*:*:*:*:*"
                ],
                "defaultStatus": "unknown",
                "product": "gunicorn",
                "vendor": "benoitc",
                "versions": [
                  {
                    "status": "affected",
                    "version": "*"
                  }
                ]
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, attackers can bypass security restrictions and access restricted endpoints. This issue is due to Gunicorn\u0027s handling of Transfer-Encoding headers, where it incorrectly processes requests with multiple, conflicting Transfer-Encoding headers, treating them as chunked regardless of the final encoding specified. This vulnerability allows for a range of attacks including cache poisoning, session manipulation, and data exposure."
          },
          {
            "lang": "es",
            "value": "Gunicorn no puede validar correctamente los encabezados Transfer-Encoding, lo que genera vulnerabilidades de contrabando de solicitudes HTTP (HRS). Al manipular solicitudes con encabezados Transfer-Encoding conflictivos, los atacantes pueden eludir las restricciones de seguridad y acceder a endpoints restringidos. Este problema se debe al manejo que hace Gunicorn de los encabezados Transfer-Encoding, donde procesa incorrectamente solicitudes con m\u00faltiples encabezados Transfer-Encoding conflictivos, trat\u00e1ndolos como fragmentados independientemente de la codificaci\u00f3n final especificada. Esta vulnerabilidad permite una variedad de ataques que incluyen envenenamiento de cach\u00e9, manipulaci\u00f3n de sesiones y exposici\u00f3n de datos."
          }
        ],
        "id": "CVE-2024-1135",
        "lastModified": "2026-06-17T07:03:32.610",
        "metrics": {
          "cvssMetricV30": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                "version": "3.0"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "security@huntr.dev",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2024-1135",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "yes"
                  },
                  {
                    "technicalImpact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-04-19T17:32:23.631972Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2024-04-16T00:15:07.797",
        "references": [
          {
            "source": "security@huntr.dev",
            "url": "https://huntr.com/bounties/22158e34-cfd5-41ad-97e0-a780773d96c1"
          },
          {
            "source": "security@huntr.dev",
            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00027.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://huntr.com/bounties/22158e34-cfd5-41ad-97e0-a780773d96c1"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00027.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2024/12/msg00018.html"
          }
        ],
        "sourceIdentifier": "security@huntr.dev",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-444"
              }
            ],
            "source": "security@huntr.dev",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-07-03T01:47:10+00:00",
      "cve": "CVE-2024-1135",
      "id": "CVE-2024-1135",
      "initial_release_date": "2024-04-15T00:00:00+00:00",
      "product_status:fixed": "22",
      "product_status:known_affected": "6",
      "product_status:known_not_affected": "2486",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "python-gunicorn: HTTP Request Smuggling due to improper validation of Transfer-Encoding headers",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-1135.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-01T01:14:40Z",
      "cve": "CVE-2024-1135",
      "id": "CVE-2024-1135",
      "initial_release_date": "2024-04-18T02:31:32Z",
      "product_status:known_affected": "404",
      "product_status:recommended": "66",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-1135",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-1135.json",
      "version": "30"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2024-12-20T07:02:46.961Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
              {
                "tags": [
                  "x_transferred"
                ],
                "url": "https://huntr.com/bounties/22158e34-cfd5-41ad-97e0-a780773d96c1"
              },
              {
                "tags": [
                  "x_transferred"
                ],
                "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00027.html"
              },
              {
                "url": "https://lists.debian.org/debian-lts-announce/2024/12/msg00018.html"
              }
            ],
            "title": "CVE Program Container"
          },
          {
            "affected": [
              {
                "cpes": [
                  "cpe:2.3:a:benoitc:gunicorn:*:*:*:*:*:*:*:*"
                ],
                "defaultStatus": "unknown",
                "product": "gunicorn",
                "vendor": "benoitc",
                "versions": [
                  {
                    "status": "affected",
                    "version": "*"
                  }
                ]
              }
            ],
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2024-1135",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-04-19T17:32:23.631972Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2024-04-19T17:41:03.802Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "benoitc/gunicorn",
              "vendor": "benoitc",
              "versions": [
                {
                  "lessThanOrEqual": "latest",
                  "status": "affected",
                  "version": "unspecified",
                  "versionType": "custom"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, attackers can bypass security restrictions and access restricted endpoints. This issue is due to Gunicorn\u0027s handling of Transfer-Encoding headers, where it incorrectly processes requests with multiple, conflicting Transfer-Encoding headers, treating them as chunked regardless of the final encoding specified. This vulnerability allows for a range of attacks including cache poisoning, session manipulation, and data exposure."
            }
          ],
          "metrics": [
            {
              "cvssV3_0": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                "version": "3.0"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-444",
                  "description": "CWE-444 Inconsistent Interpretation of HTTP Requests",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2024-06-30T23:06:05.937Z",
            "orgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
            "shortName": "@huntr_ai"
          },
          "references": [
            {
              "url": "https://huntr.com/bounties/22158e34-cfd5-41ad-97e0-a780773d96c1"
            },
            {
              "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00027.html"
            }
          ],
          "source": {
            "advisory": "22158e34-cfd5-41ad-97e0-a780773d96c1",
            "discovery": "EXTERNAL"
          },
          "title": "HTTP Request Smuggling in benoitc/gunicorn"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
        "assignerShortName": "@huntr_ai",
        "cveId": "CVE-2024-1135",
        "datePublished": "2024-04-16T00:00:14.938Z",
        "dateReserved": "2024-01-31T18:15:14.296Z",
        "dateUpdated": "2025-02-13T17:27:34.444Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.