Vulnerability-Lookup

CVE-2020-25097 (GCVE-0-2020-25097)

Vulnerability from cvelistv5 – Published: 2021-03-19 04:08 – Updated: 2024-08-04 15:26

Summary

An issue was discovered in Squid through 4.13 and 5.x through 5.0.4. Due to improper input validation, it allows a trusted client to perform HTTP Request Smuggling and access services otherwise forbidden by the security controls. This occurs for certain uri_whitespace configuration settings.

Severity

8.6 (High)


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

CWE

Assigner

mitre mitre root

References

9 references

URL	Tags
https://github.com/squid-cache/squid/security/adv…	x_refsource_MISC
http://www.squid-cache.org/Versions/v4/changesets…	x_refsource_MISC
http://www.squid-cache.org/Versions/v5/changesets…	x_refsource_MISC
https://www.debian.org/security/2021/dsa-4873	vendor-advisoryx_refsource_DEBIAN
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://security.gentoo.org/glsa/202105-14	vendor-advisoryx_refsource_GENTOO
https://security.netapp.com/advisory/ntap-2021072…	x_refsource_CONFIRM

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T15:26:09.610Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-jvf6-h9gj-pmj6"
          },
          {
            "tags": [
              "x_refsource_MISC",
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            ],
            "url": "http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_11.patch"
          },
          {
            "tags": [
              "x_refsource_MISC",
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            "url": "http://www.squid-cache.org/Versions/v5/changesets/SQUID-2020_11.patch"
          },
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        },
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          "url": "https://security.gentoo.org/glsa/202105-14"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20210727-0010/"
        }
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            },
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            },
            {
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            },
            {
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              "refsource": "FEDORA",
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            },
            {
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            {
              "name": "https://security.netapp.com/advisory/ntap-20210727-0010/",
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              "url": "https://security.netapp.com/advisory/ntap-20210727-0010/"
            }
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2020-25097",
    "datePublished": "2021-03-19T04:08:54.000Z",
    "dateReserved": "2020-09-03T00:00:00.000Z",
    "dateUpdated": "2024-08-04T15:26:09.610Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-09-14",
      "epss": "0.08161",
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    },
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Party Advisory\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20210727-0010/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.debian.org/security/2021/dsa-4873\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_11.patch\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Patch\",\"Vendor Advisory\"]},{\"url\":\"http://www.squid-cache.org/Versions/v5/changesets/SQUID-2020_11.patch\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://github.com/squid-cache/squid/security/advisories/GHSA-jvf6-h9gj-pmj6\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DJMDRVV677AJL4BZAOLCT5LMFCGBZTC2/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FBXFWKIGXPERDVQXG556LLPUOCMQGERC/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O3RYBDMJCPYGOSURWDR3WJTE474UFT77/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://security.gentoo.org/glsa/202105-14\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20210727-0010/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.debian.org/security/2021/dsa-4873\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2025-11-21T14:44:51+00:00",
      "cve": "CVE-2020-25097",
      "id": "CVE-2020-25097",
      "initial_release_date": "2020-09-04T00:00:00+00:00",
      "product_status:fixed": "158",
      "product_status:known_affected": "4",
      "product_status:known_not_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "squid: improper input validation may allow a trusted client to perform HTTP request smuggling",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-25097.json",
      "version": "3"
    }
  }
}

SUSE-SU-2021:1838-1

Vulnerability from csaf_suse - Published: 2021-06-02 14:28 - Updated: 2021-06-02 14:28

Summary

Security update for squid

Severity

Important

Scope

5 vulnerabilities in this advisory, including CVE-2020-25097.

CVE-2020-25097

8.6 (High)


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

Recommended: 8 products

Open the full advisory

SUSE-SU-2021:1961-1

Vulnerability from csaf_suse - Published: 2021-06-11 10:56 - Updated: 2021-06-11 10:56

Summary

Security update for squid

Severity

Important

Scope

5 vulnerabilities in this advisory, including CVE-2020-25097.

CVE-2020-25097

8.6 (High)


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

Recommended: 36 products

Open the full advisory

SUSE-SU-2022:14914-1

Vulnerability from csaf_suse - Published: 2022-03-15 10:31 - Updated: 2022-03-15 10:31

Summary

Security update for squid3

Severity

Important

Scope

2 vulnerabilities in this advisory, including CVE-2020-25097.

CVE-2020-25097

8.6 (High)


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

Recommended: 5 products

Open the full advisory

SUSE-SU-2022:2392-1

Vulnerability from csaf_suse - Published: 2022-07-13 18:14 - Updated: 2022-07-13 18:14

Summary

Security update for squid

Severity

Important

Scope

3 vulnerabilities in this advisory, including CVE-2020-25097.

CVE-2020-25097

8.6 (High)


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

Recommended: 10 products

Open the full advisory

ubuntu-cve-2020-25097

Vulnerability from osv_ubuntu

Published

2021-03-19 05:15

Modified

2025-09-08 16:46

Summary

Details

Severity

8.6 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2020-25097	REPORT
	https://github.com/squid-cache/squid/security/adv…	REPORT
	https://ubuntu.com/security/notices/USN-4895-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2020-25097	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "3.5.12-1ubuntu7.16"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "3.5.12-1ubuntu7.16"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "3.5.12-1ubuntu7.16"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "3.5.12-1ubuntu7.16"
          },
          {
            "binary_name": "squid3",
            "binary_version": "3.5.12-1ubuntu7.16"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "3.5.12-1ubuntu7.16"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "squid3",
        "purl": "pkg:deb/ubuntu/squid3@3.5.12-1ubuntu7.16?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.5.12-1ubuntu7.16"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.3.8-1ubuntu16",
        "3.3.8-1ubuntu17",
        "3.5.12-1ubuntu6",
        "3.5.12-1ubuntu7",
        "3.5.12-1ubuntu7.1",
        "3.5.12-1ubuntu7.2",
        "3.5.12-1ubuntu7.3",
        "3.5.12-1ubuntu7.4",
        "3.5.12-1ubuntu7.5",
        "3.5.12-1ubuntu7.6",
        "3.5.12-1ubuntu7.7",
        "3.5.12-1ubuntu7.8",
        "3.5.12-1ubuntu7.9",
        "3.5.12-1ubuntu7.10",
        "3.5.12-1ubuntu7.11",
        "3.5.12-1ubuntu7.12",
        "3.5.12-1ubuntu7.13",
        "3.5.12-1ubuntu7.14",
        "3.5.12-1ubuntu7.15"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "3.5.27-1ubuntu1.10"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "3.5.27-1ubuntu1.10"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "3.5.27-1ubuntu1.10"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "3.5.27-1ubuntu1.10"
          },
          {
            "binary_name": "squid3",
            "binary_version": "3.5.27-1ubuntu1.10"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "3.5.27-1ubuntu1.10"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "squid3",
        "purl": "pkg:deb/ubuntu/squid3@3.5.27-1ubuntu1.10?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.5.27-1ubuntu1.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.5.23-5ubuntu1",
        "3.5.23-5ubuntu2",
        "3.5.27-1ubuntu1",
        "3.5.27-1ubuntu1.1",
        "3.5.27-1ubuntu1.2",
        "3.5.27-1ubuntu1.3",
        "3.5.27-1ubuntu1.4",
        "3.5.27-1ubuntu1.5",
        "3.5.27-1ubuntu1.6",
        "3.5.27-1ubuntu1.7",
        "3.5.27-1ubuntu1.8",
        "3.5.27-1ubuntu1.9"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "4.10-1ubuntu1.3"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "4.10-1ubuntu1.3"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "4.10-1ubuntu1.3"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "4.10-1ubuntu1.3"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "4.10-1ubuntu1.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@4.10-1ubuntu1.3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.10-1ubuntu1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.8-1ubuntu2",
        "4.8-1ubuntu3",
        "4.9-2ubuntu1",
        "4.9-2ubuntu2",
        "4.9-2ubuntu3",
        "4.9-2ubuntu4",
        "4.10-1ubuntu1",
        "4.10-1ubuntu1.1",
        "4.10-1ubuntu1.2"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in Squid through 4.13 and 5.x through 5.0.4. Due to improper input validation, it allows a trusted client to perform HTTP Request Smuggling and access services otherwise forbidden by the security controls. This occurs for certain uri_whitespace configuration settings.",
  "id": "UBUNTU-CVE-2020-25097",
  "modified": "2025-09-08T16:46:18Z",
  "published": "2021-03-19T05:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-25097"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-jvf6-h9gj-pmj6"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4895-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-25097"
    }
  ],
  "related": [
    "USN-4895-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-25097"
  ]
}

WID-SEC-W-2022-0670

Vulnerability from csaf_certbund - Published: 2021-03-07 23:00 - Updated: 2023-09-27 22:00

Summary

Squid: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

Severity

Mittel

Scope

1 vulnerability in this advisory, including CVE-2020-25097.

CVE-2020-25097

Es existiert eine Schwachstelle in Squid. Die Schwachstelle besteht aufgrund einer unsachgemäßen Eingabevalidierung und ermöglicht 'HTTP-Request-Smuggling'. Ein entfernter anonymer Angreifer kann diese Sicherheitslücke ausnutzen, um Sicherheitsmaßnahmen zu umgehen.

Known affected: 8 products

Open the full advisory

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.

Action not permitted

CVE-2020-25097 (GCVE-0-2020-25097)

SUSE-SU-2021:1838-1

SUSE-SU-2021:1961-1

SUSE-SU-2022:14914-1

SUSE-SU-2022:2392-1

ubuntu-cve-2020-25097

Vulnerability from osv_ubuntu

WID-SEC-W-2022-0670

Tags

Sightings

Nomenclature