Vulnerability-Lookup

FKIE_CVE-2021-46784

Vulnerability from fkie_nvd - Published: 2022-07-17 22:15 - Updated: 2026-06-17 04:15

Severity

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

Summary

In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a Denial of Service can occur when processing long Gopher server responses.

References

URL	Tags
cve@mitre.org	http://www.openwall.com/lists/oss-security/2023/10/13/1
cve@mitre.org	http://www.openwall.com/lists/oss-security/2023/10/13/10
cve@mitre.org	http://www.openwall.com/lists/oss-security/2023/10/21/1
cve@mitre.org	http://www.squid-cache.org/Versions/v4/changesets/SQUID-2021_7.patch	Broken Link
cve@mitre.org	http://www.squid-cache.org/Versions/v5/changesets/SQUID-2021_7.patch	Patch, Vendor Advisory
cve@mitre.org	https://github.com/squid-cache/squid/commit/5e2ea2b13bd98f53e29964ca26bb0d602a8a12b9	Patch, Third Party Advisory
cve@mitre.org	https://github.com/squid-cache/squid/security/advisories/GHSA-f5cp-6rh3-284w	Mitigation, Patch, Third Party Advisory
cve@mitre.org	https://security-tracker.debian.org/tracker/CVE-2021-46784	Third Party Advisory
cve@mitre.org	https://security.netapp.com/advisory/ntap-20221223-0007/	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2023/10/13/1
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2023/10/13/10
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2023/10/21/1
af854a3a-2127-422b-91ae-364da2661108	http://www.squid-cache.org/Versions/v4/changesets/SQUID-2021_7.patch	Broken Link
af854a3a-2127-422b-91ae-364da2661108	http://www.squid-cache.org/Versions/v5/changesets/SQUID-2021_7.patch	Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/squid-cache/squid/commit/5e2ea2b13bd98f53e29964ca26bb0d602a8a12b9	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/squid-cache/squid/security/advisories/GHSA-f5cp-6rh3-284w	Mitigation, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://security-tracker.debian.org/tracker/CVE-2021-46784	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://security.netapp.com/advisory/ntap-20221223-0007/	Third Party Advisory

Impacted products

Vendor	Product	Version
squid-cache	squid	*
squid-cache	squid	*
squid-cache	squid	*
debian	debian_linux	10.0
debian	debian_linux	11.0
debian	debian_linux	12.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FC9F2659-B37B-4E7B-AE40-B91BF3CE4E88",
              "versionEndIncluding": "3.5.28",
              "versionStartIncluding": "3.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AD4A9EF2-CA36-4C09-8A67-6AE01B16E04E",
              "versionEndIncluding": "4.17",
              "versionStartIncluding": "4.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "56C44696-C2E8-42DC-877F-B97943F8DD87",
              "versionEndExcluding": "5.6",
              "versionStartIncluding": "5.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "46D69DCC-AE4D-4EA5-861C-D60951444C6C",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a Denial of Service can occur when processing long Gopher server responses."
    },
    {
      "lang": "es",
      "value": "En Squid versiones 3.x hasta 3.5.28, versiones 4.x hasta 4.17 y versiones 5.x anteriores a 5.6, debido a una administraci\u00f3n inapropiada del b\u00fafer, puede producirse una denegaci\u00f3n de servicio cuando son procesadas respuestas largas del servidor Gopher"
    }
  ],
  "id": "CVE-2021-46784",
  "lastModified": "2026-06-17T04:15:34.057",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2022-07-17T22:15:08.737",
  "references": [
    {
      "source": "cve@mitre.org",
      "url": "http://www.openwall.com/lists/oss-security/2023/10/13/1"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.openwall.com/lists/oss-security/2023/10/13/10"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.openwall.com/lists/oss-security/2023/10/21/1"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Broken Link"
      ],
      "url": "http://www.squid-cache.org/Versions/v4/changesets/SQUID-2021_7.patch"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "http://www.squid-cache.org/Versions/v5/changesets/SQUID-2021_7.patch"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/squid-cache/squid/commit/5e2ea2b13bd98f53e29964ca26bb0d602a8a12b9"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mitigation",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-f5cp-6rh3-284w"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security-tracker.debian.org/tracker/CVE-2021-46784"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security.netapp.com/advisory/ntap-20221223-0007/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2023/10/13/1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2023/10/13/10"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2023/10/21/1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Broken Link"
      ],
      "url": "http://www.squid-cache.org/Versions/v4/changesets/SQUID-2021_7.patch"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "http://www.squid-cache.org/Versions/v5/changesets/SQUID-2021_7.patch"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/squid-cache/squid/commit/5e2ea2b13bd98f53e29964ca26bb0d602a8a12b9"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mitigation",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-f5cp-6rh3-284w"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security-tracker.debian.org/tracker/CVE-2021-46784"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security.netapp.com/advisory/ntap-20221223-0007/"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-617"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-46784 (GCVE-0-2021-46784)

Vulnerability from cvelistv5 – Published: 2022-07-17 00:00 – Updated: 2024-08-04 05:17

Summary

In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a Denial of Service can occur when processing long Gopher server responses.

Severity

No CVSS data available.

CWE

Assigner

mitre CNA under the mitre root

CNA scorecard E 28/100 over 2316 records in the last 180 days details

References

9 references

URL	Tags
https://github.com/squid-cache/squid/commit/5e2ea…
http://www.squid-cache.org/Versions/v4/changesets…
http://www.squid-cache.org/Versions/v5/changesets…
https://github.com/squid-cache/squid/security/adv…
https://security-tracker.debian.org/tracker/CVE-2…
https://security.netapp.com/advisory/ntap-2022122…
http://www.openwall.com/lists/oss-security/2023/10/13/1	mailing-list
http://www.openwall.com/lists/oss-security/2023/1…	mailing-list
http://www.openwall.com/lists/oss-security/2023/10/21/1	mailing-list

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:17:42.311Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/squid-cache/squid/commit/5e2ea2b13bd98f53e29964ca26bb0d602a8a12b9"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://www.squid-cache.org/Versions/v4/changesets/SQUID-2021_7.patch"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://www.squid-cache.org/Versions/v5/changesets/SQUID-2021_7.patch"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-f5cp-6rh3-284w"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security-tracker.debian.org/tracker/CVE-2021-46784"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20221223-0007/"
          },
          {
            "name": "[oss-security] 20231013 Re: Squid Caching Proxy Security Audit: 55 Vulnerabilities, 35 0days.",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2023/10/13/1"
          },
          {
            "name": "[oss-security] 20231013 Re: Squid Caching Proxy Security Audit: 55 Vulnerabilities, 35 0days.",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2023/10/13/10"
          },
          {
            "name": "[oss-security] 20231021 Re: Squid Caching Proxy Security Audit: 55 Vulnerabilities, 35 0days.",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2023/10/21/1"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a Denial of Service can occur when processing long Gopher server responses."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-10-21T23:06:16.659Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://github.com/squid-cache/squid/commit/5e2ea2b13bd98f53e29964ca26bb0d602a8a12b9"
        },
        {
          "url": "http://www.squid-cache.org/Versions/v4/changesets/SQUID-2021_7.patch"
        },
        {
          "url": "http://www.squid-cache.org/Versions/v5/changesets/SQUID-2021_7.patch"
        },
        {
          "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-f5cp-6rh3-284w"
        },
        {
          "url": "https://security-tracker.debian.org/tracker/CVE-2021-46784"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20221223-0007/"
        },
        {
          "name": "[oss-security] 20231013 Re: Squid Caching Proxy Security Audit: 55 Vulnerabilities, 35 0days.",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2023/10/13/1"
        },
        {
          "name": "[oss-security] 20231013 Re: Squid Caching Proxy Security Audit: 55 Vulnerabilities, 35 0days.",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2023/10/13/10"
        },
        {
          "name": "[oss-security] 20231021 Re: Squid Caching Proxy Security Audit: 55 Vulnerabilities, 35 0days.",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2023/10/21/1"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-46784",
    "datePublished": "2022-07-17T00:00:00.000Z",
    "dateReserved": "2022-04-21T00:00:00.000Z",
    "dateUpdated": "2024-08-04T05:17:42.311Z",
    "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.

Vulnerability timeline

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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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