Vulnerability-Lookup

CVE-2021-40491 (GCVE-0-2021-40491)

Vulnerability from cvelistv5 – Published: 2021-09-03 00:00 – Updated: 2024-08-04 02:44

Summary

The ftp client in GNU Inetutils before 2.2 does not validate addresses returned by PASV/LSPV responses to make sure they match the server address. This is similar to CVE-2020-8284 for curl.

Severity

6.5 (Medium)


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

CWE

Assigner

mitre mitre root

References

4 references

URL	Tags
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug…
https://git.savannah.gnu.org/cgit/inetutils.git/c…
https://lists.gnu.org/archive/html/bug-inetutils/…
https://lists.debian.org/debian-lts-announce/2022…	mailing-list

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2021-40491

Vulnerability from fkie_nvd - Published: 2021-09-03 02:15 - Updated: 2026-06-17 04:07

Severity

6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Summary

The ftp client in GNU Inetutils before 2.2 does not validate addresses returned by PASV/LSPV responses to make sure they match the server address. This is similar to CVE-2020-8284 for curl.

References

URL	Tags
cve@mitre.org	https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=993476	Third Party Advisory
cve@mitre.org	https://git.savannah.gnu.org/cgit/inetutils.git/commit/?id=58cb043b190fd04effdaea7c9403416b436e50dd	Patch, Vendor Advisory
cve@mitre.org	https://lists.debian.org/debian-lts-announce/2022/11/msg00033.html	Mailing List, Third Party Advisory
cve@mitre.org	https://lists.gnu.org/archive/html/bug-inetutils/2021-06/msg00002.html	Mailing List, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=993476	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://git.savannah.gnu.org/cgit/inetutils.git/commit/?id=58cb043b190fd04effdaea7c9403416b436e50dd	Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2022/11/msg00033.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.gnu.org/archive/html/bug-inetutils/2021-06/msg00002.html	Mailing List, Vendor Advisory

Impacted products

	Vendor	Product	Version
	gnu	inetutils	*
	debian	debian_linux	10.0

JSON

To clipboard

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      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
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      "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=993476"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Vendor Advisory"
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    },
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00033.html"
    },
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      "url": "https://lists.gnu.org/archive/html/bug-inetutils/2021-06/msg00002.html"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-345"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-QW8R-VCWC-VJC9

Vulnerability from github – Published: 2022-05-24 19:13 – Updated: 2022-11-25 21:30

Details

The ftp client in GNU Inetutils before 2.2 does not validate addresses returned by PASV/LSPV responses to make sure they match the server address. This is similar to CVE-2020-8284 for curl.

Severity

6.5 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-40491"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-345"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-09-03T02:15:00Z",
    "severity": "MODERATE"
  },
  "details": "The ftp client in GNU Inetutils before 2.2 does not validate addresses returned by PASV/LSPV responses to make sure they match the server address. This is similar to CVE-2020-8284 for curl.",
  "id": "GHSA-qw8r-vcwc-vjc9",
  "modified": "2022-11-25T21:30:26Z",
  "published": "2022-05-24T19:13:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-40491"
    },
    {
      "type": "WEB",
      "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=993476"
    },
    {
      "type": "WEB",
      "url": "https://git.savannah.gnu.org/cgit/inetutils.git/commit/?id=58cb043b190fd04effdaea7c9403416b436e50dd"
    },
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      "url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00033.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.gnu.org/archive/html/bug-inetutils/2021-06/msg00002.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GSD-2021-40491

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

The ftp client in GNU Inetutils before 2.2 does not validate addresses returned by PASV/LSPV responses to make sure they match the server address. This is similar to CVE-2020-8284 for curl.

Aliases

CVE-2021-40491

Aliases

CVE-2021-40491

JSON

To clipboard

{
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    "description": "The ftp client in GNU Inetutils before 2.2 does not validate addresses returned by PASV/LSPV responses to make sure they match the server address. This is similar to CVE-2020-8284 for curl.",
    "id": "GSD-2021-40491",
    "references": [
      "https://ubuntu.com/security/CVE-2021-40491"
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  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
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      "modified": "2023-12-13T01:23:25.819801Z",
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            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
            "version": "2.0"
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          "exploitabilityScore": 8.6,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
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          "userInteractionRequired": true
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
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}

UBUNTU-CVE-2021-40491 (CVE-2021-40491)

Vulnerability from osv_ubuntu – Published: 2021-09-03 02:15 – Updated: 2025-10-15 16:50 – Source website

Details

The ftp client in GNU Inetutils before 2.2 does not validate addresses returned by PASV/LSPV responses to make sure they match the server address. This is similar to CVE-2020-8284 for curl.

Severity

6.5 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2021-40491	REPORT
	https://lists.gnu.org/archive/html/bug-inetutils/…	REPORT
	https://git.savannah.gnu.org/cgit/inetutils.git/c…	REPORT
	https://bugs.debian.org/cgi-bin/bugreport.cgi?bug…	REPORT
	https://ubuntu.com/security/notices/USN-5177-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2021-40491	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "inetutils-ftp",
            "binary_version": "2:1.9.2-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "inetutils-ftpd",
            "binary_version": "2:1.9.2-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "inetutils-inetd",
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      },
      "package": {
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  "aliases": [],
  "details": "The ftp client in GNU Inetutils before 2.2 does not validate addresses returned by PASV/LSPV responses to make sure they match the server address. This is similar to CVE-2020-8284 for curl.",
  "id": "UBUNTU-CVE-2021-40491",
  "modified": "2025-10-15T16:50:52Z",
  "published": "2021-09-03T02:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-40491"
    },
    {
      "type": "REPORT",
      "url": "https://lists.gnu.org/archive/html/bug-inetutils/2021-06/msg00002.html"
    },
    {
      "type": "REPORT",
      "url": "https://git.savannah.gnu.org/cgit/inetutils.git/commit/?id=58cb043b190fd04effdaea7c9403416b436e50dd"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=993476"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5177-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-40491"
    }
  ],
  "related": [
    "USN-5177-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-40491"
  ]
}

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.

Related by attack behaviour

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

CVE-2021-40491 (GCVE-0-2021-40491)

FKIE_CVE-2021-40491

GHSA-QW8R-VCWC-VJC9

GSD-2021-40491

UBUNTU-CVE-2021-40491 (CVE-2021-40491)

Tags

Sightings

Nomenclature

Related by attack behaviour