ubuntu-cve-2021-44528
Vulnerability from osv_ubuntu
Published
2022-01-10 14:10
Modified
2026-05-20 14:53
Summary
Details

A open redirect vulnerability exists in Action Pack >= 6.0.0 that could allow an attacker to craft a "X-Forwarded-Host" headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website.

Severity
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rails",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
          },
          {
            "binary_name": "ruby-actioncable",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
          },
          {
            "binary_name": "ruby-actionmailbox",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
          },
          {
            "binary_name": "ruby-actionmailer",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
          },
          {
            "binary_name": "ruby-actionpack",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
          },
          {
            "binary_name": "ruby-actiontext",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
          },
          {
            "binary_name": "ruby-actionview",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
          },
          {
            "binary_name": "ruby-activejob",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
          },
          {
            "binary_name": "ruby-activemodel",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
          },
          {
            "binary_name": "ruby-activerecord",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
          },
          {
            "binary_name": "ruby-activestorage",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
          },
          {
            "binary_name": "ruby-activesupport",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
          },
          {
            "binary_name": "ruby-rails",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
          },
          {
            "binary_name": "ruby-railties",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "rails",
        "purl": "pkg:deb/ubuntu/rails@2:6.1.4.1+dfsg-8ubuntu2+esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:6.0.3.7+dfsg-2",
        "2:6.1.4.1+dfsg-8ubuntu2",
        "2:6.1.4.1+dfsg-8ubuntu2+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rails",
            "binary_version": "2:6.1.7.3+dfsg-3"
          },
          {
            "binary_name": "ruby-actioncable",
            "binary_version": "2:6.1.7.3+dfsg-3"
          },
          {
            "binary_name": "ruby-actionmailbox",
            "binary_version": "2:6.1.7.3+dfsg-3"
          },
          {
            "binary_name": "ruby-actionmailer",
            "binary_version": "2:6.1.7.3+dfsg-3"
          },
          {
            "binary_name": "ruby-actionpack",
            "binary_version": "2:6.1.7.3+dfsg-3"
          },
          {
            "binary_name": "ruby-actiontext",
            "binary_version": "2:6.1.7.3+dfsg-3"
          },
          {
            "binary_name": "ruby-actionview",
            "binary_version": "2:6.1.7.3+dfsg-3"
          },
          {
            "binary_name": "ruby-activejob",
            "binary_version": "2:6.1.7.3+dfsg-3"
          },
          {
            "binary_name": "ruby-activemodel",
            "binary_version": "2:6.1.7.3+dfsg-3"
          },
          {
            "binary_name": "ruby-activerecord",
            "binary_version": "2:6.1.7.3+dfsg-3"
          },
          {
            "binary_name": "ruby-activestorage",
            "binary_version": "2:6.1.7.3+dfsg-3"
          },
          {
            "binary_name": "ruby-activesupport",
            "binary_version": "2:6.1.7.3+dfsg-3"
          },
          {
            "binary_name": "ruby-rails",
            "binary_version": "2:6.1.7.3+dfsg-3"
          },
          {
            "binary_name": "ruby-railties",
            "binary_version": "2:6.1.7.3+dfsg-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "rails",
        "purl": "pkg:deb/ubuntu/rails@2:6.1.7.3+dfsg-3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:6.1.7.3+dfsg-2build1",
        "2:6.1.7.3+dfsg-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rails",
            "binary_version": "2:7.2.2.1+dfsg-7"
          },
          {
            "binary_name": "ruby-actioncable",
            "binary_version": "2:7.2.2.1+dfsg-7"
          },
          {
            "binary_name": "ruby-actionmailbox",
            "binary_version": "2:7.2.2.1+dfsg-7"
          },
          {
            "binary_name": "ruby-actionmailer",
            "binary_version": "2:7.2.2.1+dfsg-7"
          },
          {
            "binary_name": "ruby-actionpack",
            "binary_version": "2:7.2.2.1+dfsg-7"
          },
          {
            "binary_name": "ruby-actiontext",
            "binary_version": "2:7.2.2.1+dfsg-7"
          },
          {
            "binary_name": "ruby-actionview",
            "binary_version": "2:7.2.2.1+dfsg-7"
          },
          {
            "binary_name": "ruby-activejob",
            "binary_version": "2:7.2.2.1+dfsg-7"
          },
          {
            "binary_name": "ruby-activemodel",
            "binary_version": "2:7.2.2.1+dfsg-7"
          },
          {
            "binary_name": "ruby-activerecord",
            "binary_version": "2:7.2.2.1+dfsg-7"
          },
          {
            "binary_name": "ruby-activestorage",
            "binary_version": "2:7.2.2.1+dfsg-7"
          },
          {
            "binary_name": "ruby-activesupport",
            "binary_version": "2:7.2.2.1+dfsg-7"
          },
          {
            "binary_name": "ruby-rails",
            "binary_version": "2:7.2.2.1+dfsg-7"
          },
          {
            "binary_name": "ruby-railties",
            "binary_version": "2:7.2.2.1+dfsg-7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "rails",
        "purl": "pkg:deb/ubuntu/rails@2:7.2.2.1+dfsg-7?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:6.1.7.3+dfsg-7",
        "2:7.2.2.1+dfsg-7"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rails",
            "binary_version": "2:7.2.3+dfsg-2"
          },
          {
            "binary_name": "ruby-actioncable",
            "binary_version": "2:7.2.3+dfsg-2"
          },
          {
            "binary_name": "ruby-actionmailbox",
            "binary_version": "2:7.2.3+dfsg-2"
          },
          {
            "binary_name": "ruby-actionmailer",
            "binary_version": "2:7.2.3+dfsg-2"
          },
          {
            "binary_name": "ruby-actionpack",
            "binary_version": "2:7.2.3+dfsg-2"
          },
          {
            "binary_name": "ruby-actiontext",
            "binary_version": "2:7.2.3+dfsg-2"
          },
          {
            "binary_name": "ruby-actionview",
            "binary_version": "2:7.2.3+dfsg-2"
          },
          {
            "binary_name": "ruby-activejob",
            "binary_version": "2:7.2.3+dfsg-2"
          },
          {
            "binary_name": "ruby-activemodel",
            "binary_version": "2:7.2.3+dfsg-2"
          },
          {
            "binary_name": "ruby-activerecord",
            "binary_version": "2:7.2.3+dfsg-2"
          },
          {
            "binary_name": "ruby-activestorage",
            "binary_version": "2:7.2.3+dfsg-2"
          },
          {
            "binary_name": "ruby-activesupport",
            "binary_version": "2:7.2.3+dfsg-2"
          },
          {
            "binary_name": "ruby-rails",
            "binary_version": "2:7.2.3+dfsg-2"
          },
          {
            "binary_name": "ruby-railties",
            "binary_version": "2:7.2.3+dfsg-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "rails",
        "purl": "pkg:deb/ubuntu/rails@2:7.2.3+dfsg-2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:7.2.2.1+dfsg-7",
        "2:7.2.2.2+dfsg-2",
        "2:7.2.3+dfsg-2"
      ]
    }
  ],
  "aliases": [],
  "details": "A open redirect vulnerability exists in Action Pack \u003e= 6.0.0 that could allow an attacker to craft a \"X-Forwarded-Host\" headers in combination with certain \"allowed host\" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website.",
  "id": "UBUNTU-CVE-2021-44528",
  "modified": "2026-05-20T14:53:37Z",
  "published": "2022-01-10T14:10:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-44528"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2021/12/14/5"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/rails/rails/commit/0fccfb9a3097a9c4260c791f1a40b128517e7815"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/rails/rails/commit/aecba3c301b80e9d5a63c30ea1b287bceaf2c107"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/rails/rails/commit/fd6a64fef1d0f7f40a8d4b046da882e83163299c"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-44528"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-44528"
  ]
}



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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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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