Vulnerability-Lookup

UBUNTU-CVE-2025-29906 (CVE-2025-29906)

Vulnerability from osv_ubuntu – Published: 2025-04-29 23:16 – Updated: 2026-05-20 15:17 – Source website

Details

Finit is a fast init for Linux systems. Versions starting from 3.0-rc1 and prior to version 4.11 bundle an implementation of getty for the tty configuration directive that can bypass /bin/login, i.e., a user can log in as any user without authentication. This issue has been patched in version 4.11.

Severity

8.6 (High)


                    
                      CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2025-29906	REPORT
	https://www.cve.org/CVERecord?id=CVE-2025-29906	REPORT
	https://github.com/troglobit/finit/commit/6528628…	REPORT
	https://github.com/troglobit/finit/security/advis…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "finit",
            "binary_version": "4.2-1"
          },
          {
            "binary_name": "finit-plugins",
            "binary_version": "4.2-1"
          },
          {
            "binary_name": "finit-sysv",
            "binary_version": "4.2-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "finit",
        "purl": "pkg:deb/ubuntu/finit@4.2-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.1-1",
        "4.2-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "finit",
            "binary_version": "4.7-1build2"
          },
          {
            "binary_name": "finit-plugins",
            "binary_version": "4.7-1build2"
          },
          {
            "binary_name": "finit-sysv",
            "binary_version": "4.7-1build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "finit",
        "purl": "pkg:deb/ubuntu/finit@4.7-1build2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.2-1",
        "4.7-1",
        "4.7-1build1",
        "4.7-1build2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "finit",
            "binary_version": "4.12-1"
          },
          {
            "binary_name": "finit-plugins",
            "binary_version": "4.12-1"
          },
          {
            "binary_name": "finit-sysv",
            "binary_version": "4.12-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "finit",
        "purl": "pkg:deb/ubuntu/finit@4.12-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.7-3",
        "4.11-1",
        "4.12-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "finit",
            "binary_version": "4.14-1"
          },
          {
            "binary_name": "finit-plugins",
            "binary_version": "4.14-1"
          },
          {
            "binary_name": "finit-sysv",
            "binary_version": "4.14-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "finit",
        "purl": "pkg:deb/ubuntu/finit@4.14-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.12-1",
        "4.14-1"
      ]
    }
  ],
  "aliases": [],
  "details": "Finit is a fast init for Linux systems. Versions starting from 3.0-rc1 and prior to version 4.11 bundle an implementation of getty for the `tty` configuration directive that can bypass `/bin/login`, i.e., a user can log in as any user without authentication. This issue has been patched in version 4.11.",
  "id": "UBUNTU-CVE-2025-29906",
  "modified": "2026-05-20T15:17:32Z",
  "published": "2025-04-29T23:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-29906"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-29906"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/troglobit/finit/commit/6528628b5c771c25ffa0cb1a46c6c89d9d0d69e0"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/troglobit/finit/security/advisories/GHSA-563g-p98j-mc9q"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-29906"
  ]
}

CVE-2025-29906 (GCVE-0-2025-29906)

Vulnerability from cvelistv5 – Published: 2025-04-29 22:17 – Updated: 2025-04-30 17:33

Title

Finit bundled getty can bypass /bin/login

Summary

Finit is a fast init for Linux systems. Versions starting from 3.0-rc1 and prior to version 4.11 bundle an implementation of getty for the `tty` configuration directive that can bypass `/bin/login`, i.e., a user can log in as any user without authentication. This issue has been patched in version 4.11.

Severity

8.6 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-30 17:33 UTC

CWE

CWE-287 - Improper Authentication

Assigner

GitHub_M mitre root

References

2 references

URL	Tags
https://github.com/troglobit/finit/security/advis…	x_refsource_CONFIRM
https://github.com/troglobit/finit/commit/6528628…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
troglobit	finit	Affected: >= 3.0-rc1, < 4.11

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-29906",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-30T17:33:11.904747Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-04-30T17:33:20.258Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "finit",
          "vendor": "troglobit",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.0-rc1, \u003c 4.11"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Finit is a fast init for Linux systems. Versions starting from 3.0-rc1 and prior to version 4.11 bundle an implementation of getty for the `tty` configuration directive that can bypass `/bin/login`, i.e., a user can log in as any user without authentication. This issue has been patched in version 4.11."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287: Improper Authentication",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-04-29T22:17:47.228Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/troglobit/finit/security/advisories/GHSA-563g-p98j-mc9q",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/troglobit/finit/security/advisories/GHSA-563g-p98j-mc9q"
        },
        {
          "name": "https://github.com/troglobit/finit/commit/6528628b5c771c25ffa0cb1a46c6c89d9d0d69e0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/troglobit/finit/commit/6528628b5c771c25ffa0cb1a46c6c89d9d0d69e0"
        }
      ],
      "source": {
        "advisory": "GHSA-563g-p98j-mc9q",
        "discovery": "UNKNOWN"
      },
      "title": "Finit bundled getty can bypass /bin/login"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-29906",
    "datePublished": "2025-04-29T22:17:47.228Z",
    "dateReserved": "2025-03-12T13:42:22.134Z",
    "dateUpdated": "2025-04-30T17:33:20.258Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

UBUNTU-CVE-2025-29906 (CVE-2025-29906)

CVE-2025-29906 (GCVE-0-2025-29906)

Tags

Sightings

Nomenclature

Related by attack behaviour