ubuntu-cve-2019-14855
Vulnerability from osv_ubuntu
Published
2020-03-20 16:15
Modified
2026-05-20 14:51
Summary
Details

A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures. This issue affects GnuPG versions before 2.2.18.

Severity
5.3 (Medium)
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
N/A (UNKNOWN)
low
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gnupg",
            "binary_version": "1.4.16-1ubuntu2.6+esm2"
          },
          {
            "binary_name": "gnupg-curl",
            "binary_version": "1.4.16-1ubuntu2.6+esm2"
          },
          {
            "binary_name": "gpgv",
            "binary_version": "1.4.16-1ubuntu2.6+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "gnupg",
        "purl": "pkg:deb/ubuntu/gnupg@1.4.16-1ubuntu2.6+esm2?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.14-1ubuntu2",
        "1.4.15-1.1ubuntu1",
        "1.4.15-1.1ubuntu2",
        "1.4.15-2ubuntu1",
        "1.4.16-1ubuntu1",
        "1.4.16-1ubuntu2",
        "1.4.16-1ubuntu2.1",
        "1.4.16-1ubuntu2.3",
        "1.4.16-1ubuntu2.4",
        "1.4.16-1ubuntu2.5",
        "1.4.16-1ubuntu2.6",
        "1.4.16-1ubuntu2.6+esm1",
        "1.4.16-1ubuntu2.6+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gnupg",
            "binary_version": "1.4.20-1ubuntu3.3+esm3"
          },
          {
            "binary_name": "gnupg-curl",
            "binary_version": "1.4.20-1ubuntu3.3+esm3"
          },
          {
            "binary_name": "gpgv",
            "binary_version": "1.4.20-1ubuntu3.3+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "gnupg",
        "purl": "pkg:deb/ubuntu/gnupg@1.4.20-1ubuntu3.3+esm3?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.18-7ubuntu1",
        "1.4.19-6ubuntu1",
        "1.4.20-1ubuntu1",
        "1.4.20-1ubuntu2",
        "1.4.20-1ubuntu3",
        "1.4.20-1ubuntu3.1",
        "1.4.20-1ubuntu3.2",
        "1.4.20-1ubuntu3.3",
        "1.4.20-1ubuntu3.3+esm2",
        "1.4.20-1ubuntu3.3+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "dirmngr",
            "binary_version": "2.1.11-6ubuntu2.1+esm3"
          },
          {
            "binary_name": "gnupg-agent",
            "binary_version": "2.1.11-6ubuntu2.1+esm3"
          },
          {
            "binary_name": "gnupg2",
            "binary_version": "2.1.11-6ubuntu2.1+esm3"
          },
          {
            "binary_name": "gpgsm",
            "binary_version": "2.1.11-6ubuntu2.1+esm3"
          },
          {
            "binary_name": "gpgv2",
            "binary_version": "2.1.11-6ubuntu2.1+esm3"
          },
          {
            "binary_name": "scdaemon",
            "binary_version": "2.1.11-6ubuntu2.1+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "gnupg2",
        "purl": "pkg:deb/ubuntu/gnupg2@2.1.11-6ubuntu2.1+esm3?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.28-3ubuntu1",
        "2.0.28-3ubuntu2",
        "2.1.11-6ubuntu1",
        "2.1.11-6ubuntu2",
        "2.1.11-6ubuntu2.1",
        "2.1.11-6ubuntu2.1+esm1",
        "2.1.11-6ubuntu2.1+esm2",
        "2.1.11-6ubuntu2.1+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "dirmngr",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "gnupg",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "gnupg-agent",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "gnupg-l10n",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "gnupg-utils",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "gnupg2",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "gpg",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "gpg-agent",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "gpg-wks-client",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "gpg-wks-server",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "gpgconf",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "gpgsm",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "gpgv",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "gpgv-static",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "gpgv-win32",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "gpgv2",
            "binary_version": "2.2.4-1ubuntu1.3"
          },
          {
            "binary_name": "scdaemon",
            "binary_version": "2.2.4-1ubuntu1.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "gnupg2",
        "purl": "pkg:deb/ubuntu/gnupg2@2.2.4-1ubuntu1.3?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.4-1ubuntu1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.1.15-1ubuntu8",
        "2.2.4-1ubuntu1",
        "2.2.4-1ubuntu1.1",
        "2.2.4-1ubuntu1.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gnupg1",
            "binary_version": "1.4.22-3ubuntu2"
          },
          {
            "binary_name": "gnupg1-l10n",
            "binary_version": "1.4.22-3ubuntu2"
          },
          {
            "binary_name": "gpgv1",
            "binary_version": "1.4.22-3ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "gnupg1",
        "purl": "pkg:deb/ubuntu/gnupg1@1.4.22-3ubuntu2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.22-1ubuntu1",
        "1.4.22-3ubuntu1",
        "1.4.22-3ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gnupg1",
            "binary_version": "1.4.23-1"
          },
          {
            "binary_name": "gnupg1-l10n",
            "binary_version": "1.4.23-1"
          },
          {
            "binary_name": "gpgv1",
            "binary_version": "1.4.23-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "gnupg1",
        "purl": "pkg:deb/ubuntu/gnupg1@1.4.23-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.23-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gnupg1",
            "binary_version": "1.4.23-1.1build1"
          },
          {
            "binary_name": "gnupg1-l10n",
            "binary_version": "1.4.23-1.1build1"
          },
          {
            "binary_name": "gpgv1",
            "binary_version": "1.4.23-1.1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "gnupg1",
        "purl": "pkg:deb/ubuntu/gnupg1@1.4.23-1.1build1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.23-1.1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gnupg1",
            "binary_version": "1.4.23-2"
          },
          {
            "binary_name": "gnupg1-l10n",
            "binary_version": "1.4.23-2"
          },
          {
            "binary_name": "gpgv1",
            "binary_version": "1.4.23-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "gnupg1",
        "purl": "pkg:deb/ubuntu/gnupg1@1.4.23-2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.23-1.1build2",
        "1.4.23-1.1build4",
        "1.4.23-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gnupg1",
            "binary_version": "1.4.23-3"
          },
          {
            "binary_name": "gnupg1-l10n",
            "binary_version": "1.4.23-3"
          },
          {
            "binary_name": "gpgv1",
            "binary_version": "1.4.23-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "gnupg1",
        "purl": "pkg:deb/ubuntu/gnupg1@1.4.23-3?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.23-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gnupg1",
            "binary_version": "1.4.23-3build1"
          },
          {
            "binary_name": "gnupg1-l10n",
            "binary_version": "1.4.23-3build1"
          },
          {
            "binary_name": "gpgv1",
            "binary_version": "1.4.23-3build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "gnupg1",
        "purl": "pkg:deb/ubuntu/gnupg1@1.4.23-3build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.23-3",
        "1.4.23-3build1"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures. This issue affects GnuPG versions before 2.2.18.",
  "id": "UBUNTU-CVE-2019-14855",
  "modified": "2026-05-20T14:51:27Z",
  "published": "2020-03-20T16:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-14855"
    },
    {
      "type": "REPORT",
      "url": "https://eprint.iacr.org/2020/014.pdf"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4516-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2019-14855"
    }
  ],
  "related": [
    "USN-4516-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2019-14855"
  ]
}



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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.