CVE catalog

CVE-2020-35359

UBUNTU-

[CVE catalog]

Pure-FTPd 1.0.48 allows remote attackers to prevent legitimate server use by making enough connections to exceed the connection limit.

Severity
High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
Updated
Source
[NVD] · [CVE record]
EPSS
4.46% · Oct 27, 2026

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / releasePackageVersionStatusSource
Ubuntu26.04pure-ftpd1.0.50-2.2build3UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu26.04pure-ftpd1.0.50-2.2build4UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu25.10pure-ftpd1.0.50-2.2build3UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu24.04pure-ftpd1.0.50-2.1build1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu24.04pure-ftpd1.0.50-2.1ubuntu1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu24.04pure-ftpd1.0.50-2.2UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu24.04pure-ftpd1.0.50-2.2build1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu24.04pure-ftpd1.0.50-2.2build2UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu22.04pure-ftpd1.0.49-4.1build1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu22.04pure-ftpd1.0.50-2UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu22.04pure-ftpd1.0.50-2.1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu22.04pure-ftpd1.0.50-2.1ubuntu0.22.04.1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]

Showing 12 observations. All 24 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence
Distribution / releasePackageVersionStatusSource
Ubuntu16.04pure-ftpd1.0.36-3.2UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu16.04pure-ftpd1.0.36-3.2+deb8u1build0.16.04.1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu16.04pure-ftpd1.0.36-3.2build1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu18.04pure-ftpd1.0.46-1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu18.04pure-ftpd1.0.46-1build1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu18.04pure-ftpd1.0.46-1ubuntu18.04.1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu20.04pure-ftpd1.0.47-3build1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu20.04pure-ftpd1.0.49-1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu20.04pure-ftpd1.0.49-2UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu20.04pure-ftpd1.0.49-3UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu20.04pure-ftpd1.0.49-4UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu20.04pure-ftpd1.0.49-4ubuntu0.1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu22.04pure-ftpd1.0.49-4.1build1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu22.04pure-ftpd1.0.50-2UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu22.04pure-ftpd1.0.50-2.1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu22.04pure-ftpd1.0.50-2.1ubuntu0.22.04.1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu24.04pure-ftpd1.0.50-2.1build1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu24.04pure-ftpd1.0.50-2.1ubuntu1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu24.04pure-ftpd1.0.50-2.2UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu24.04pure-ftpd1.0.50-2.2build1UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu24.04pure-ftpd1.0.50-2.2build2UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu25.10pure-ftpd1.0.50-2.2build3UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu26.04pure-ftpd1.0.50-2.2build3UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Ubuntu26.04pure-ftpd1.0.50-2.2build4UnknownSource applicability is not established[UBUNTU-CVE-2020-35359]
Original provider fields
{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "pure-ftpd",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "16.04",
      "versions": [
        "1.0.36-3.2",
        "1.0.36-3.2build1",
        "1.0.36-3.2+deb8u1build0.16.04.1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-35359",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2020-35359",
      "provider_updated_at": "2026-05-20T16:04:26.302136567Z",
      "applicability_unknown": true
    },
    {
      "name": "pure-ftpd",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "18.04",
      "versions": [
        "1.0.46-1",
        "1.0.46-1build1",
        "1.0.46-1ubuntu18.04.1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-35359",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2020-35359",
      "provider_updated_at": "2026-05-20T16:04:26.302136567Z",
      "applicability_unknown": true
    },
    {
      "name": "pure-ftpd",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "1.0.47-3build1",
        "1.0.49-1",
        "1.0.49-2",
        "1.0.49-3",
        "1.0.49-4",
        "1.0.49-4ubuntu0.1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-35359",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2020-35359",
      "provider_updated_at": "2026-05-20T16:04:26.302136567Z",
      "applicability_unknown": true
    },
    {
      "name": "pure-ftpd",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "22.04",
      "versions": [
        "1.0.49-4.1build1",
        "1.0.50-2",
        "1.0.50-2.1",
        "1.0.50-2.1ubuntu0.22.04.1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-35359",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2020-35359",
      "provider_updated_at": "2026-05-20T16:04:26.302136567Z",
      "applicability_unknown": true
    },
    {
      "name": "pure-ftpd",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "24.04",
      "versions": [
        "1.0.50-2.1build1",
        "1.0.50-2.1ubuntu1",
        "1.0.50-2.2",
        "1.0.50-2.2build1",
        "1.0.50-2.2build2"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-35359",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2020-35359",
      "provider_updated_at": "2026-05-20T16:04:26.302136567Z",
      "applicability_unknown": true
    },
    {
      "name": "pure-ftpd",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "25.10",
      "versions": [
        "1.0.50-2.2build3"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-35359",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2020-35359",
      "provider_updated_at": "2026-05-20T16:04:26.302136567Z",
      "applicability_unknown": true
    },
    {
      "name": "pure-ftpd",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "26.04",
      "versions": [
        "1.0.50-2.2build3",
        "1.0.50-2.2build4"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-35359",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2020-35359",
      "provider_updated_at": "2026-05-20T16:04:26.302136567Z",
      "applicability_unknown": true
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

Observed:

References

[FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]