CVE-2019-17569 (GCVE-0-2019-17569)

Vulnerability from cvelistv5 – Published: 2020-02-24 21:04 – Updated: 2024-08-05 01:40
VLAI
Summary
The refactoring present in Apache Tomcat 9.0.28 to 9.0.30, 8.5.48 to 8.5.50 and 7.0.98 to 7.0.99 introduced a regression. The result of the regression was that invalid Transfer-Encoding headers were incorrectly processed leading to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.
Severity
4.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE
  • HTTP Request Smuggling
Assigner
References
Impacted products
Vendor Product Version CPE status
Apache Apache Tomcat Affected: Apache Tomcat 9.0.28 to 9.0.30
Affected: 8.5.48 to 8.5.50
Affected: 7.0.98 to 7.0.99
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            "url": "https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743%40%3Ccommits.tomee.apache.org%3E"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2020/03/msg00006.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20200327-0005/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2020/dsa-4673"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2020/dsa-4680"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://www.oracle.com/security-alerts/cpujan2021.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://www.oracle.com/security-alerts/cpujul2020.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://www.oracle.com/security-alerts/cpuoct2020.html"
          }
        ],
        "sourceIdentifier": "security@apache.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-444"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-04T23:12:25+00:00",
      "cve": "CVE-2019-17569",
      "id": "CVE-2019-17569",
      "initial_release_date": "2019-01-01T00:00:00+00:00",
      "product_status:fixed": "45",
      "product_status:known_affected": "5",
      "product_status:known_not_affected": "31",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "tomcat: Regression in handling of Transfer-Encoding header allows for HTTP request smuggling",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2019/cve-2019-17569.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-28T23:58:02Z",
      "cve": "CVE-2019-17569",
      "id": "CVE-2019-17569",
      "initial_release_date": "2023-02-15T04:07:18Z",
      "product_status:known_affected": "484",
      "product_status:known_not_affected": "56",
      "product_status:recommended": "386",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2019-17569",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2019-17569.json",
      "version": "34"
    }
  }
}



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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.



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.