Vulnerability-Lookup

OESA-2023-1947 (CVE-2023-50269)

Vulnerability from osv_openeuler – Published: 2023-12-22 11:06 – Updated: 2026-08-06 11:06 – Source website

Summary

squid security update

Details

Squid is a high-performance proxy caching server. It handles all requests in a single, non-blocking, I/O-driven process and keeps meta data and implements negative caching of failed requests.

Security Fix(es):

Squid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through 2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is configured. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives.(CVE-2023-50269)

Severity

8.6 (High)


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

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2023-50269	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "squid-debuginfo-4.9-18.oe1.aarch64.rpm",
          "squid-debugsource-4.9-18.oe1.aarch64.rpm",
          "squid-4.9-18.oe1.aarch64.rpm"
        ],
        "src": [
          "squid-4.9-18.oe1.src.rpm"
        ],
        "x86_64": [
          "squid-debugsource-4.9-18.oe1.x86_64.rpm",
          "squid-debuginfo-4.9-18.oe1.x86_64.rpm",
          "squid-4.9-18.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "squid",
        "purl": "pkg:rpm/openEuler/squid\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.9-18.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "squid-4.9-18.oe1.aarch64.rpm",
          "squid-debugsource-4.9-18.oe1.aarch64.rpm",
          "squid-debuginfo-4.9-18.oe1.aarch64.rpm"
        ],
        "src": [
          "squid-4.9-18.oe1.src.rpm"
        ],
        "x86_64": [
          "squid-debuginfo-4.9-18.oe1.x86_64.rpm",
          "squid-4.9-18.oe1.x86_64.rpm",
          "squid-debugsource-4.9-18.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP3",
        "name": "squid",
        "purl": "pkg:rpm/openEuler/squid\u0026distro=openEuler-20.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.9-18.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "squid-4.9-18.oe2003sp4.aarch64.rpm",
          "squid-debuginfo-4.9-18.oe2003sp4.aarch64.rpm",
          "squid-debugsource-4.9-18.oe2003sp4.aarch64.rpm"
        ],
        "src": [
          "squid-4.9-18.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "squid-debugsource-4.9-18.oe2003sp4.x86_64.rpm",
          "squid-4.9-18.oe2003sp4.x86_64.rpm",
          "squid-debuginfo-4.9-18.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "squid",
        "purl": "pkg:rpm/openEuler/squid\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.9-18.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "squid-debugsource-4.9-22.oe2203.aarch64.rpm",
          "squid-4.9-22.oe2203.aarch64.rpm",
          "squid-debuginfo-4.9-22.oe2203.aarch64.rpm",
          "squid-debuginfo-4.9-22.oe2203sp1.aarch64.rpm",
          "squid-4.9-22.oe2203sp1.aarch64.rpm",
          "squid-debugsource-4.9-22.oe2203sp1.aarch64.rpm",
          "squid-debuginfo-4.9-22.oe2203sp2.aarch64.rpm",
          "squid-debugsource-4.9-22.oe2203sp2.aarch64.rpm",
          "squid-4.9-22.oe2203sp2.aarch64.rpm"
        ],
        "src": [
          "squid-4.9-22.oe2203.src.rpm",
          "squid-4.9-22.oe2203sp1.src.rpm",
          "squid-4.9-22.oe2203sp2.src.rpm"
        ],
        "x86_64": [
          "squid-debugsource-4.9-22.oe2203.x86_64.rpm",
          "squid-debuginfo-4.9-22.oe2203.x86_64.rpm",
          "squid-4.9-22.oe2203.x86_64.rpm",
          "squid-debuginfo-4.9-22.oe2203sp1.x86_64.rpm",
          "squid-debugsource-4.9-22.oe2203sp1.x86_64.rpm",
          "squid-4.9-22.oe2203sp1.x86_64.rpm",
          "squid-4.9-22.oe2203sp2.x86_64.rpm",
          "squid-debugsource-4.9-22.oe2203sp2.x86_64.rpm",
          "squid-debuginfo-4.9-22.oe2203sp2.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS",
        "name": "squid",
        "purl": "pkg:rpm/openEuler/squid\u0026distro=openEuler-22.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.9-22.oe2203sp2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "squid-debuginfo-4.9-22.oe2203sp1.aarch64.rpm",
          "squid-4.9-22.oe2203sp1.aarch64.rpm",
          "squid-debugsource-4.9-22.oe2203sp1.aarch64.rpm"
        ],
        "src": [
          "squid-4.9-22.oe2203sp1.src.rpm"
        ],
        "x86_64": [
          "squid-debuginfo-4.9-22.oe2203sp1.x86_64.rpm",
          "squid-debugsource-4.9-22.oe2203sp1.x86_64.rpm",
          "squid-4.9-22.oe2203sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP1",
        "name": "squid",
        "purl": "pkg:rpm/openEuler/squid\u0026distro=openEuler-22.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.9-22.oe2203sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "squid-debuginfo-4.9-22.oe2203sp2.aarch64.rpm",
          "squid-debugsource-4.9-22.oe2203sp2.aarch64.rpm",
          "squid-4.9-22.oe2203sp2.aarch64.rpm"
        ],
        "src": [
          "squid-4.9-22.oe2203sp2.src.rpm"
        ],
        "x86_64": [
          "squid-4.9-22.oe2203sp2.x86_64.rpm",
          "squid-debugsource-4.9-22.oe2203sp2.x86_64.rpm",
          "squid-debuginfo-4.9-22.oe2203sp2.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP2",
        "name": "squid",
        "purl": "pkg:rpm/openEuler/squid\u0026distro=openEuler-22.03-LTS-SP2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.9-22.oe2203sp2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "Squid is a high-performance proxy caching server. It handles all requests in a single, non-blocking, I/O-driven process and keeps meta data and implements negative caching of failed requests.\r\n\r\nSecurity Fix(es):\r\n\r\nSquid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through 2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is configured. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid\u0026apos;s patch archives.(CVE-2023-50269)",
  "id": "OESA-2023-1947",
  "modified": "2026-08-06T11:06:23Z",
  "published": "2023-12-22T11:06:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1947"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-50269"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "squid security update",
  "upstream": [
    "CVE-2023-50269"
  ]
}

CVE-2023-50269 (GCVE-0-2023-50269)

Vulnerability from cvelistv5 – Published: 2023-12-14 17:09 – Updated: 2025-05-21 14:31

Title

SQUID-2023:10 Denial of Service in HTTP Request parsing

Summary

Severity

8.6 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2023-12-19 14:21 UTC

CWE

CWE-674 - Uncontrolled Recursion

Assigner

GitHub_M mitre root

References

7 references

URL	Tags
https://github.com/squid-cache/squid/security/adv…	x_refsource_CONFIRM
http://www.squid-cache.org/Versions/v5/SQUID-2023…	x_refsource_MISC
http://www.squid-cache.org/Versions/v6/SQUID-2023…	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.debian.org/debian-lts-announce/2024…
https://security.netapp.com/advisory/ntap-2024011…

Impacted products

1 product

Vendor	Product	Version
squid-cache	squid	Affected: >= 2.6, <= 2.7.STABLE9 Affected: >= 3.1, <= 5.9 Affected: >= 6.0.1, < 6.6

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T22:16:46.315Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3",
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3"
          },
          {
            "name": "http://www.squid-cache.org/Versions/v5/SQUID-2023_10.patch",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://www.squid-cache.org/Versions/v5/SQUID-2023_10.patch"
          },
          {
            "name": "http://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00003.html"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20240119-0005/"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2023-50269",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2023-12-19T14:21:27.775746Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-05-21T14:31:00.896Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "squid",
          "vendor": "squid-cache",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.6, \u003c= 2.7.STABLE9"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.1, \u003c= 5.9"
            },
            {
              "status": "affected",
              "version": "\u003e= 6.0.1, \u003c 6.6"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Squid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through 2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is configured. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid\u0027s patch archives."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-674",
              "description": "CWE-674: Uncontrolled Recursion",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-01-19T16:06:57.654Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3"
        },
        {
          "name": "http://www.squid-cache.org/Versions/v5/SQUID-2023_10.patch",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://www.squid-cache.org/Versions/v5/SQUID-2023_10.patch"
        },
        {
          "name": "http://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/"
        },
        {
          "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00003.html"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20240119-0005/"
        }
      ],
      "source": {
        "advisory": "GHSA-wgq4-4cfg-c4x3",
        "discovery": "UNKNOWN"
      },
      "title": "SQUID-2023:10 Denial of Service in HTTP Request parsing"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2023-50269",
    "datePublished": "2023-12-14T17:09:25.168Z",
    "dateReserved": "2023-12-05T20:42:59.381Z",
    "dateUpdated": "2025-05-21T14:31:00.896Z",
    "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.

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

OESA-2023-1947 (CVE-2023-50269)

CVE-2023-50269 (GCVE-0-2023-50269)

Tags

Sightings

Nomenclature

Related by attack behaviour