FKIE_CVE-2023-5824

Vulnerability from fkie_nvd - Published: 2023-11-03 08:15 - Updated: 2026-06-17 06:49
Summary
A flaw was found in Squid. The limits applied for validation of HTTP response headers are applied before caching. However, Squid may grow a cached HTTP response header beyond the configured maximum size, causing a stall or crash of the worker process when a large header is retrieved from the disk cache, resulting in a denial of service.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2023:7465
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2023:7668
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2024:0072
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2024:0397
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2024:0771
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2024:0772
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2024:0773
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2024:1153
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2023-5824Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2245914Issue Tracking
secalert@redhat.comhttps://github.com/squid-cache/squid/security/advisories/GHSA-543m-w2m2-g255Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2023:7465
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2023:7668
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2024:0072
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2024:0397
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2024:0771
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2024:0772
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2024:0773
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2024:1153
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/security/cve/CVE-2023-5824Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=2245914Issue Tracking
af854a3a-2127-422b-91ae-364da2661108https://github.com/squid-cache/squid/security/advisories/GHSA-543m-w2m2-g255Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/09/msg00027.html
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20231130-0003/
Impacted products

{
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          "defaultStatus": "affected",
          "packageName": "squid:4",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat",
          "versions": [
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              "status": "unaffected",
              "version": "8090020231130092412.a75119d5",
              "versionType": "rpm"
            }
          ]
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            "cpe:/a:redhat:rhel_e4s:8.2::appstream",
            "cpe:/a:redhat:rhel_aus:8.2::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "squid:4",
          "product": "Red Hat Enterprise Linux 8.2 Advanced Update Support",
          "vendor": "Red Hat",
          "versions": [
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              "status": "unaffected",
              "version": "8020020240122164331.4cda2c84",
              "versionType": "rpm"
            }
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          ],
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          "packageName": "squid:4",
          "product": "Red Hat Enterprise Linux 8.2 Telecommunications Update Service",
          "vendor": "Red Hat",
          "versions": [
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              "status": "unaffected",
              "version": "8020020240122164331.4cda2c84",
              "versionType": "rpm"
            }
          ]
        },
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          "product": "Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions",
          "vendor": "Red Hat",
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            "cpe:/a:redhat:rhel_aus:8.4::appstream"
          ],
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          "product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
          "vendor": "Red Hat",
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          "product": "Red Hat Enterprise Linux 8.4 Telecommunications Update Service",
          "vendor": "Red Hat",
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              "status": "unaffected",
              "version": "8040020240122165847.522a0ee4",
              "versionType": "rpm"
            }
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        },
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            "cpe:/a:redhat:rhel_aus:8.4::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "squid:4",
          "product": "Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
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              "status": "unaffected",
              "version": "8040020240122165847.522a0ee4",
              "versionType": "rpm"
            }
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        },
        {
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          "cpes": [
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          ],
          "defaultStatus": "affected",
          "packageName": "squid:4",
          "product": "Red Hat Enterprise Linux 8.6 Extended Update Support",
          "vendor": "Red Hat",
          "versions": [
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              "status": "unaffected",
              "version": "8060020231222131040.ad008a3a",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
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          ],
          "defaultStatus": "affected",
          "packageName": "squid:4",
          "product": "Red Hat Enterprise Linux 8.8 Extended Update Support",
          "vendor": "Red Hat",
          "versions": [
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        },
        {
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          "cpes": [
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          ],
          "defaultStatus": "affected",
          "packageName": "squid",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat",
          "versions": [
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              "status": "unaffected",
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              "versionType": "rpm"
            }
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          ],
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          "vendor": "Red Hat",
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              "versionType": "rpm"
            }
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          "cpes": [
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          ],
          "defaultStatus": "affected",
          "packageName": "squid",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
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          "cpes": [
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          ],
          "defaultStatus": "affected",
          "packageName": "squid",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1D384D1F-2A05-4EE0-9CB8-C83FDC53F608",
              "versionEndExcluding": "6.4",
              "vulnerable": true
            }
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          "negate": false,
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Squid. The limits applied for validation of HTTP response headers are applied before caching. However, Squid may grow a cached HTTP response header beyond the configured maximum size, causing a stall or crash of the worker process when a large header is retrieved from the disk cache, resulting in a denial of service."
    },
    {
      "lang": "es",
      "value": "Squid es vulnerable a ataques de Denegaci\u00f3n de Servicio contra clientes HTTP y HTTPS debido a un error en el manejo inadecuado de elementos estructurales."
    }
  ],
  "id": "CVE-2023-5824",
  "lastModified": "2026-06-17T06:49:26.767",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      },
      {
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          "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,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2023-11-03T08:15:08.270",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2023:7465"
    },
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    },
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      "url": "https://access.redhat.com/errata/RHSA-2024:0771"
    },
    {
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      "url": "https://access.redhat.com/errata/RHSA-2024:0772"
    },
    {
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    },
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    },
    {
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      "tags": [
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      ],
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    },
    {
      "source": "secalert@redhat.com",
      "tags": [
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      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2245914"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
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      ],
      "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-543m-w2m2-g255"
    },
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      "url": "https://access.redhat.com/errata/RHSA-2023:7668"
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      "url": "https://access.redhat.com/errata/RHSA-2024:0072"
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      "url": "https://access.redhat.com/errata/RHSA-2024:0771"
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      "url": "https://access.redhat.com/errata/RHSA-2024:0772"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://access.redhat.com/errata/RHSA-2024:0773"
    },
    {
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      "url": "https://access.redhat.com/errata/RHSA-2024:1153"
    },
    {
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      "tags": [
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      ],
      "url": "https://access.redhat.com/security/cve/CVE-2023-5824"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2245914"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-543m-w2m2-g255"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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    },
    {
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      "url": "https://security.netapp.com/advisory/ntap-20231130-0003/"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-755"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-755"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.

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Detection rules are retrieved from Rulezet.

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