Vulnerability-Lookup

CVE-2021-20217 (GCVE-0-2021-20217)

Vulnerability from cvelistv5 – Published: 2021-03-25 18:57 – Updated: 2024-08-03 17:30

Summary

A flaw was found in Privoxy in versions before 3.0.31. An assertion failure triggered by a crafted CGI request may lead to denial of service. The highest threat from this vulnerability is to system availability.

Severity

7.5 (High)


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

CWE

CWE-617

Assigner

redhat redhat root

References

2 references

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1923252	x_refsource_MISC
https://security.gentoo.org/glsa/202107-16	vendor-advisoryx_refsource_GENTOO

Impacted products

1 product

Vendor	Product	Version	CPE status
n/a	privoxy	Affected: privoxy 3.0.31

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2021-20217

Vulnerability from fkie_nvd - Published: 2021-03-25 19:15 - Updated: 2026-06-17 03:33

Severity

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

Summary

References

URL	Tags
secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=1923252	Issue Tracking, Third Party Advisory
secalert@redhat.com	https://security.gentoo.org/glsa/202107-16	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://bugzilla.redhat.com/show_bug.cgi?id=1923252	Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://security.gentoo.org/glsa/202107-16	Third Party Advisory

Impacted products

	Vendor	Product	Version
	privoxy	privoxy	*

JSON

To clipboard

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          "product": "privoxy",
          "vendor": "n/a",
          "versions": [
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  "lastModified": "2026-06-17T03:33:29.360",
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}

GHSA-R622-5GGQ-2MH5

Vulnerability from github – Published: 2022-05-24 17:45 – Updated: 2022-05-24 17:45

Details

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-20217"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-617"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-03-25T19:15:00Z",
    "severity": "HIGH"
  },
  "details": "A flaw was found in Privoxy in versions before 3.0.31. An assertion failure triggered by a crafted CGI request may lead to denial of service. The highest threat from this vulnerability is to system availability.",
  "id": "GHSA-r622-5ggq-2mh5",
  "modified": "2022-05-24T17:45:22Z",
  "published": "2022-05-24T17:45:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20217"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1923252"
    },
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    }
  ],
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}

GSD-2021-20217

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

Details

Aliases

CVE-2021-20217

Aliases

CVE-2021-20217

JSON

To clipboard

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    "id": "GSD-2021-20217",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-20217.html",
      "https://ubuntu.com/security/CVE-2021-20217",
      "https://advisories.mageia.org/CVE-2021-20217.html",
      "https://security.archlinux.org/CVE-2021-20217"
    ]
  },
  "gsd": {
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      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
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      "modified": "2023-12-13T01:23:11.952742Z",
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                "cpe23Uri": "cpe:2.3:a:privoxy:privoxy:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "3.0.31",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "secalert@redhat.com",
          "ID": "CVE-2021-20217"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "A flaw was found in Privoxy in versions before 3.0.31. An assertion failure triggered by a crafted CGI request may lead to denial of service. The highest threat from this vulnerability is to system availability."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-617"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1923252",
              "refsource": "MISC",
              "tags": [
                "Issue Tracking",
                "Third Party Advisory"
              ],
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1923252"
            },
            {
              "name": "GLSA-202107-16",
              "refsource": "GENTOO",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://security.gentoo.org/glsa/202107-16"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 7.8,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 6.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2021-12-14T20:08Z",
      "publishedDate": "2021-03-25T19:15Z"
    }
  }
}

OPENSUSE-SU-2021:0265-1

Vulnerability from csaf_opensuse - Published: 2021-02-08 17:05 - Updated: 2021-02-08 17:05

Summary

Security update for privoxy

Severity

Moderate

Scope

2 vulnerabilities in this advisory, including CVE-2021-20217.

CVE-2021-20217

7.5 (High)


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

Recommended: 2 products

Open the full advisory

OPENSUSE-SU-2021:0279-1

Vulnerability from csaf_opensuse - Published: 2021-02-12 05:06 - Updated: 2021-02-12 05:06

Summary

Security update for privoxy

Severity

Moderate

Scope

2 vulnerabilities in this advisory, including CVE-2021-20217.

CVE-2021-20217

7.5 (High)


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

Recommended: 5 products

Open the full advisory

OPENSUSE-SU-2024:11193-1

Vulnerability from csaf_opensuse - Published: 2024-06-15 00:00 - Updated: 2024-06-15 00:00

Summary

privoxy-3.0.32-2.3 on GA media

Severity

Moderate

Scope

7 vulnerabilities in this advisory, including CVE-2021-20217.

CVE-2021-20217

7.5 (High)


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

Recommended: 8 products

Open the full advisory

ubuntu-cve-2021-20217

Vulnerability from osv_ubuntu

Published

2021-02-05 00:00

Modified

2025-09-08 16:46

Summary

Details

Severity

7.5 (High)


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

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2021-20217	REPORT
	https://www.openwall.com/lists/oss-security/2021/…	REPORT
	https://www.privoxy.org/gitweb/?p=privoxy.git;a=c…	REPORT
	https://ubuntu.com/security/notices/USN-4886-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2021-20217	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "privoxy",
            "binary_version": "3.0.21-7+deb8u1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "privoxy",
        "purl": "pkg:deb/ubuntu/privoxy@3.0.21-7+deb8u1ubuntu0.1~esm1?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.0.21-7+deb8u1ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.0.21-1",
        "3.0.21-2",
        "3.0.21-7+deb8u1build0.14.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "privoxy",
            "binary_version": "3.0.24-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "privoxy",
        "purl": "pkg:deb/ubuntu/privoxy@3.0.24-1ubuntu0.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.0.24-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.0.23-3",
        "3.0.23-4",
        "3.0.23-5",
        "3.0.24-1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "privoxy",
            "binary_version": "3.0.26-5ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "privoxy",
        "purl": "pkg:deb/ubuntu/privoxy@3.0.26-5ubuntu0.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.0.26-5ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.0.26-3",
        "3.0.26-4",
        "3.0.26-5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "privoxy",
            "binary_version": "3.0.28-2ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "privoxy",
        "purl": "pkg:deb/ubuntu/privoxy@3.0.28-2ubuntu0.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.0.28-2ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.0.28-2"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in Privoxy in versions before 3.0.31. An assertion failure triggered by a crafted CGI request may lead to denial of service. The highest threat from this vulnerability is to system availability.",
  "id": "UBUNTU-CVE-2021-20217",
  "modified": "2025-09-08T16:46:55Z",
  "published": "2021-02-05T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-20217"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2021/01/31/2"
    },
    {
      "type": "REPORT",
      "url": "https://www.privoxy.org/gitweb/?p=privoxy.git;a=commit;h=5bba5b89193fa2eeea51aa39fb6525c47b59a82a"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4886-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-20217"
    }
  ],
  "related": [
    "USN-4886-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-20217"
  ]
}

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.

Detection rules are retrieved from Rulezet.

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-2021-20217 (GCVE-0-2021-20217)

FKIE_CVE-2021-20217

GHSA-R622-5GGQ-2MH5

GSD-2021-20217

OPENSUSE-SU-2021:0265-1

OPENSUSE-SU-2021:0279-1

OPENSUSE-SU-2024:11193-1

ubuntu-cve-2021-20217

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature

Related by attack behaviour