ubuntu-cve-2021-36370
Vulnerability from osv_ubuntu
Published
2021-08-30 19:15
Modified
2025-09-08 16:47
Summary
Details

An issue was discovered in Midnight Commander through 4.8.26. When establishing an SFTP connection, the fingerprint of the server is neither checked nor displayed. As a result, a user connects to the server without the ability to verify its authenticity.

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
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "mc",
            "binary_version": "3:4.8.11-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "mc-data",
            "binary_version": "3:4.8.11-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "mc",
        "purl": "pkg:deb/ubuntu/mc@3:4.8.11-1ubuntu0.1~esm1?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3:4.8.11-1ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3:4.8.5-1",
        "3:4.8.10-4",
        "3:4.8.11-1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "mc",
            "binary_version": "3:4.8.15-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "mc-data",
            "binary_version": "3:4.8.15-2ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "mc",
        "purl": "pkg:deb/ubuntu/mc@3:4.8.15-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3:4.8.15-2ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3:4.8.13-3",
        "3:4.8.15-2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "mc",
            "binary_version": "3:4.8.19-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "mc-data",
            "binary_version": "3:4.8.19-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "mc",
        "purl": "pkg:deb/ubuntu/mc@3:4.8.19-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3:4.8.19-1ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3:4.8.19-1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "mc",
            "binary_version": "3:4.8.24-2ubuntu1+esm1"
          },
          {
            "binary_name": "mc-data",
            "binary_version": "3:4.8.24-2ubuntu1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "mc",
        "purl": "pkg:deb/ubuntu/mc@3:4.8.24-2ubuntu1+esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3:4.8.24-2ubuntu1+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3:4.8.22-1build1",
        "3:4.8.23-1",
        "3:4.8.24-2ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "mc",
            "binary_version": "3:4.8.27-1"
          },
          {
            "binary_name": "mc-data",
            "binary_version": "3:4.8.27-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "mc",
        "purl": "pkg:deb/ubuntu/mc@3:4.8.27-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3:4.8.27-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3:4.8.26-1.1"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in Midnight Commander through 4.8.26. When establishing an SFTP connection, the fingerprint of the server is neither checked nor displayed. As a result, a user connects to the server without the ability to verify its authenticity.",
  "id": "UBUNTU-CVE-2021-36370",
  "modified": "2025-09-08T16:47:15Z",
  "published": "2021-08-30T19:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-36370"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/MidnightCommander/mc/commit/9235d3c232d13ad7f973346077c9cf2eaa77dc5f"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/MidnightCommander/mc/blob/master/src/vfs/sftpfs/connection.c"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/MidnightCommander/mc/blob/5c1d3c55dd15356ec7d079084d904b7b0fd58d3e/src/vfs/sftpfs/connection.c#L484"
    },
    {
      "type": "REPORT",
      "url": "https://sourceforge.net/projects/mcwin32/files/"
    },
    {
      "type": "REPORT",
      "url": "https://midnight-commander.org/"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5160-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-36370"
    }
  ],
  "related": [
    "USN-5160-1"
  ],
  "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-2021-36370"
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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Detection rules are retrieved from Rulezet.