ubuntu-cve-2020-27304
Vulnerability from osv_ubuntu
Published
2021-10-21 16:15
Modified
2026-05-20 14:52
Summary
Details

The CivetWeb web library does not validate uploaded filepaths when running on an OS other than Windows, when using the built-in HTTP form-based file upload mechanism, via the mg_handle_form_request API. Web applications that use the file upload form handler, and use parts of the user-controlled filename in the output path, are susceptible to directory traversal

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "civetweb",
            "binary_version": "1.15+dfsg-3"
          },
          {
            "binary_name": "libcivetweb1",
            "binary_version": "1.15+dfsg-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "civetweb",
        "purl": "pkg:deb/ubuntu/civetweb@1.15+dfsg-3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.13+dfsg-5",
        "1.15+dfsg-1",
        "1.15+dfsg-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "civetweb",
            "binary_version": "1.16+dfsg-1build1"
          },
          {
            "binary_name": "libcivetweb1",
            "binary_version": "1.16+dfsg-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "civetweb",
        "purl": "pkg:deb/ubuntu/civetweb@1.16+dfsg-1build1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.16+dfsg-1",
        "1.16+dfsg-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "civetweb",
            "binary_version": "1.16+dfsg-2"
          },
          {
            "binary_name": "libcivetweb1",
            "binary_version": "1.16+dfsg-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "civetweb",
        "purl": "pkg:deb/ubuntu/civetweb@1.16+dfsg-2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.16+dfsg-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "civetweb",
            "binary_version": "1.16+dfsg-3"
          },
          {
            "binary_name": "libcivetweb1",
            "binary_version": "1.16+dfsg-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "civetweb",
        "purl": "pkg:deb/ubuntu/civetweb@1.16+dfsg-3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.16+dfsg-2",
        "1.16+dfsg-3"
      ]
    }
  ],
  "aliases": [],
  "details": "The CivetWeb web library does not validate uploaded filepaths when running on an OS other than Windows, when using the built-in HTTP form-based file upload mechanism, via the mg_handle_form_request API. Web applications that use the file upload form handler, and use parts of the user-controlled filename in the output path, are susceptible to directory traversal",
  "id": "UBUNTU-CVE-2020-27304",
  "modified": "2026-05-20T14:52:31Z",
  "published": "2021-10-21T16:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-27304"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-27304"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-27304"
  ]
}



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