Vulnerability-Lookup

UBUNTU-CVE-2019-19270 (CVE-2019-19270)

Vulnerability from osv_ubuntu – Published: 2019-11-26 04:15 – Updated: 2026-10-17 09:06 – Source website

Details

An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.

Severity

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2019-19270	REPORT
	https://github.com/proftpd/proftpd/issues/859	REPORT
	https://www.cve.org/CVERecord?id=CVE-2019-19270	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "proftpd-basic",
            "binary_version": "1.3.5a-1ubuntu0.1"
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            "binary_version": "1.3.5a-1ubuntu0.1"
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          {
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          },
          {
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          },
          {
            "binary_name": "proftpd-mod-sqlite",
            "binary_version": "1.3.5a-1ubuntu0.1"
          }
        ]
      },
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            }
          ],
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        }
      ],
      "versions": [
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        "1.3.5a-1",
        "1.3.5a-1build1",
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      ]
    },
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      "ecosystem_specific": {
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      },
      "ranges": [
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        }
      ],
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    },
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          {
            "binary_name": "proftpd-mod-crypto",
            "binary_version": "1.3.8.b+dfsg-1ubuntu0.1"
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          {
            "binary_name": "proftpd-mod-geoip",
            "binary_version": "1.3.8.b+dfsg-1ubuntu0.1"
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          {
            "binary_name": "proftpd-mod-mysql",
            "binary_version": "1.3.8.b+dfsg-1ubuntu0.1"
          },
          {
            "binary_name": "proftpd-mod-odbc",
            "binary_version": "1.3.8.b+dfsg-1ubuntu0.1"
          },
          {
            "binary_name": "proftpd-mod-pgsql",
            "binary_version": "1.3.8.b+dfsg-1ubuntu0.1"
          },
          {
            "binary_name": "proftpd-mod-snmp",
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          },
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          },
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            "binary_version": "1.3.8.b+dfsg-1ubuntu0.1"
          }
        ]
      },
      "package": {
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        "name": "proftpd-dfsg",
        "purl": "pkg:deb/ubuntu/proftpd-dfsg@1.3.8.b+dfsg-1ubuntu0.1?arch=source\u0026distro=noble"
      },
      "ranges": [
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            {
              "introduced": "0"
            }
          ],
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        }
      ],
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        "1.3.8.a+dfsg-1",
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        "1.3.8.b+dfsg-1build2",
        "1.3.8.b+dfsg-1build3",
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      ]
    },
    {
      "ecosystem_specific": {
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            "binary_version": "1.3.9~dfsg-3"
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          {
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            "binary_name": "proftpd-mod-odbc",
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          },
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            "binary_version": "1.3.9~dfsg-3"
          },
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            "binary_version": "1.3.9~dfsg-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "proftpd-dfsg",
        "purl": "pkg:deb/ubuntu/proftpd-dfsg@1.3.9~dfsg-3?arch=source\u0026distro=questing"
      },
      "ranges": [
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      ],
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        "1.3.8.c+dfsg-4",
        "1.3.9~dfsg-3"
      ]
    },
    {
      "ecosystem_specific": {
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          {
            "binary_name": "proftpd-core",
            "binary_version": "1.3.9d~dfsg-1"
          },
          {
            "binary_name": "proftpd-mod-crypto",
            "binary_version": "1.3.9d~dfsg-1"
          },
          {
            "binary_name": "proftpd-mod-geoip",
            "binary_version": "1.3.9d~dfsg-1"
          },
          {
            "binary_name": "proftpd-mod-ldap",
            "binary_version": "1.3.9d~dfsg-1"
          },
          {
            "binary_name": "proftpd-mod-mysql",
            "binary_version": "1.3.9d~dfsg-1"
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          {
            "binary_name": "proftpd-mod-odbc",
            "binary_version": "1.3.9d~dfsg-1"
          },
          {
            "binary_name": "proftpd-mod-pgsql",
            "binary_version": "1.3.9d~dfsg-1"
          },
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            "binary_version": "1.3.9d~dfsg-1"
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          },
          {
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            "binary_version": "1.3.9~dfsg-4"
          },
          {
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            "binary_name": "proftpd-mod-snmp",
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          },
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            "binary_version": "1.3.9~dfsg-4"
          },
          {
            "binary_name": "proftpd-mod-wrap",
            "binary_version": "1.3.9~dfsg-4"
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      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "proftpd-dfsg",
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      },
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      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.",
  "id": "UBUNTU-CVE-2019-19270",
  "modified": "2026-10-17T09:06:50Z",
  "published": "2019-11-26T04:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-19270"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/proftpd/proftpd/issues/859"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2019-19270"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2019-19270"
  ]
}

CVE-2019-19270 (GCVE-0-2019-19270)

Vulnerability from cvelistv5 – Published: 2019-11-26 03:34 – Updated: 2024-08-05 02:09

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre CNA under the mitre root

CNA scorecard E 28/100 over 2322 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/proftpd/proftpd/issues/859	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE

Show details on NVD website

JSON

To clipboard

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            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server."
            }
          ]
        },
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          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/proftpd/proftpd/issues/859",
              "refsource": "MISC",
              "url": "https://github.com/proftpd/proftpd/issues/859"
            },
            {
              "name": "FEDORA-2019-65a983b8b6",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OGBBCPLJSDPFG5EI5P5G7P4KEX7YSD5G/"
            },
            {
              "name": "FEDORA-2019-bfacf1e958",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QR65XUHPCRU3NXTSFVF2J4GWRIHC7AHW/"
            },
            {
              "name": "openSUSE-SU-2020:0031",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html"
            }
          ]
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      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2019-19270",
    "datePublished": "2019-11-26T03:34:09.000Z",
    "dateReserved": "2019-11-26T00:00:00.000Z",
    "dateUpdated": "2024-08-05T02:09:39.558Z",
    "state": "PUBLISHED"
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}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

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