CVE-2023-46728

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{"affected": [{"affectedData": [{"product": "squid", "vendor": "squid-cache", "versions": [{"status": "affected", "version": "< 6.0.1"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*", "matchCriteriaId": "4205423B-C18E-4565-867C-BF885D21DF03", "versionEndExcluding": "6.0.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this bug are possible to be received from any gopher server, even those without malicious intent. Gopher support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should reject all gopher URL requests."}, {"lang": "es", "value": "Squid es un proxy de almacenamiento en cach\u00e9 para la Web que admite HTTP, HTTPS, FTP y m\u00e1s. Debido a un bug de desreferencia de NULL pointer, Squid es vulnerable a un ataque de Denegaci\u00f3n de Servicio contra la puerta de enlace Gopher de Squid. El protocolo Gopher siempre est\u00e1 disponible y habilitado en Squid antes de Squid 6.0.1. Es posible recibir respuestas que desencadenen este error desde cualquier servidor Gopher, incluso aquellos sin intenciones maliciosas. La compatibilidad con Gopher se elimin\u00f3 en la versi\u00f3n 6.0.1 de Squid. Se recomienda a los usuarios que actualicen. Los usuarios que no puedan actualizar deben rechazar todas las solicitudes de URL de Gopher."}], "id": "CVE-2023-46728", "lastModified": "2026-06-17T06:31:25.867", "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": "security-advisories@github.com", "type": "Secondary"}, {"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": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-46728", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-11-27T16:14:28.614073Z", "version": "2.0.3"}}]}, "published": "2023-11-06T18:15:08.637", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/squid-cache/squid/commit/6ea12e8fb590ac6959e9356a81aa3370576568c3"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-cg5h-v6vc-w33f"}, {"source": "security-advisories@github.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/"}, {"source": "security-advisories@github.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/"}, {"source": "security-advisories@github.com", "url": "https://security.netapp.com/advisory/ntap-20231214-0006/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://github.com/squid-cache/squid/commit/6ea12e8fb590ac6959e9356a81aa3370576568c3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-cg5h-v6vc-w33f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/09/msg00027.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20231214-0006/"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2024:1787", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "squid-7:3.5.20-17.el7_9.10", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2024-04-11T00:00:00Z"}, {"advisory": "RHSA-2024:0046", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "squid:4-8090020231207155957.a75119d5", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-01-03T00:00:00Z"}, {"advisory": "RHSA-2024:0772", "cpe": "cpe:/a:redhat:rhel_aus:8.2", "package": "squid:4-8020020240122164331.4cda2c84", "product_name": "Red Hat Enterprise Linux 8.2 Advanced Update Support", "release_date": "2024-02-12T00:00:00Z"}, {"advisory": "RHSA-2024:0772", "cpe": "cpe:/a:redhat:rhel_tus:8.2", "package": "squid:4-8020020240122164331.4cda2c84", "product_name": "Red Hat Enterprise Linux 8.2 Telecommunications Update Service", "release_date": "2024-02-12T00:00:00Z"}, {"advisory": "RHSA-2024:0772", "cpe": "cpe:/a:redhat:rhel_e4s:8.2", "package": "squid:4-8020020240122164331.4cda2c84", "product_name": "Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions", "release_date": "2024-02-12T00:00:00Z"}, {"advisory": "RHSA-2024:0773", "cpe": "cpe:/a:redhat:rhel_aus:8.4", "package": "squid:4-8040020240122165847.522a0ee4", "product_name": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support", "release_date": "2024-02-12T00:00:00Z"}, {"advisory": "RHSA-2024:0773", "cpe": "cpe:/a:redhat:rhel_tus:8.4", "package": "squid:4-8040020240122165847.522a0ee4", "product_name": "Red Hat Enterprise Linux 8.4 Telecommunications Update Service", "release_date": "2024-02-12T00:00:00Z"}, {"advisory": "RHSA-2024:0773", "cpe": "cpe:/a:redhat:rhel_e4s:8.4", "package": "squid:4-8040020240122165847.522a0ee4", "product_name": "Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions", "release_date": "2024-02-12T00:00:00Z"}, {"advisory": "RHSA-2024:0771", "cpe": "cpe:/a:redhat:rhel_eus:8.6", "package": "squid:4-8060020231222131040.ad008a3a", "product_name": "Red Hat Enterprise Linux 8.6 Extended Update Support", "release_date": "2024-02-12T00:00:00Z"}, {"advisory": "RHSA-2024:0397", "cpe": "cpe:/a:redhat:rhel_eus:8.8", "package": "squid:4-8080020231222130009.63b34585", "product_name": "Red Hat Enterprise Linux 8.8 Extended Update Support", "release_date": "2024-01-24T00:00:00Z"}, {"advisory": "RHSA-2024:0071", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "squid-7:5.5-6.el9_3.5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-01-08T00:00:00Z"}, {"advisory": "RHSA-2024:1153", "cpe": "cpe:/a:redhat:rhel_eus:9.0", "package": "squid-7:5.2-1.el9_0.4", "product_name": "Red Hat Enterprise Linux 9.0 Extended Update Support", "release_date": "2024-03-05T00:00:00Z"}, {"advisory": "RHSA-2024:0072", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "squid-7:5.5-5.el9_2.3", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-01-08T00:00:00Z"}], "bugzilla": {"description": "squid: NULL pointer dereference in the gopher protocol code", "id": "2248521", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2248521"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-476", "details": ["Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this bug are possible to be received from any gopher server, even those without malicious intent. Gopher support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should reject all gopher URL requests.", "Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The gopher protocol is always available and enabled in Squid. This issue may lead to a remote denial of service via gopher URL requests."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, create an access list configuration to reject all gopher URL requests:\nSet ACL directives in your squid.conf file (or equivalent) as follows:\nacl gopher proto gopher\nhttp_access deny gopher\nImportant: This sequence must be placed above any lines starting with \"http_access allow\" in your configuration.\nObservation: Some loss of performance may occur with this configuration."}, "name": "CVE-2023-46728", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "squid", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "squid34", "product_name": "Red Hat Enterprise Linux 6"}], "public_date": "2023-09-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-46728\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-46728\nhttps://github.com/squid-cache/squid/security/advisories/GHSA-cg5h-v6vc-w33f\nhttps://megamansec.github.io/Squid-Security-Audit/gopher-nullpointer.html"], "threat_severity": "Important"}

{}