CVE-2023-46724

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Due to an Improper Validation of Specified Index bug, Squid versions 3.3.0.1 through 5.9 and 6.0 prior to 6.4 compiled using `--with-openssl` are vulnerable to a Denial of Service attack against SSL Certificate validation. This problem allows a remote server to perform Denial of Service against Squid Proxy by initiating a TLS Handshake with a specially crafted SSL Certificate in a server certificate chain. This attack is limited to HTTPS and SSL-Bump. This bug is fixed in Squid version 6.4. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. Those who you use a prepackaged version of Squid should refer to the package vendor for availability information on updated packages."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125: Out-of-bounds Read"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-129", "description": "CWE-129: Improper Validation of Array Index"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-786", "description": "CWE-786: Access of Memory Location Before Start of Buffer"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-823", "description": "CWE-823: Use of Out-of-range Pointer Offset"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-1285", "description": "CWE-1285: Improper Validation of Specified Index, Position, or Offset in Input"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2023-12-29T03:06:29.936Z"}}}, "cveMetadata": {"cveId": "CVE-2023-46724", "state": "PUBLISHED", "dateUpdated": "2025-02-13T17:14:32.361Z", "dateReserved": "2023-10-25T14:30:33.751Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2023-11-01T19:09:34.513Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"product": "squid", "vendor": "squid-cache", "versions": [{"status": "affected", "version": ">= 3.3.0.1, < 6.4"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*", "matchCriteriaId": "E8CC0157-8647-4BC3-AD22-4325B85D8A78", "versionEndExcluding": "6.4", "versionStartIncluding": "3.3.0.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Squid is a caching proxy for the Web. Due to an Improper Validation of Specified Index bug, Squid versions 3.3.0.1 through 5.9 and 6.0 prior to 6.4 compiled using `--with-openssl` are vulnerable to a Denial of Service attack against SSL Certificate validation. This problem allows a remote server to perform Denial of Service against Squid Proxy by initiating a TLS Handshake with a specially crafted SSL Certificate in a server certificate chain. This attack is limited to HTTPS and SSL-Bump. This bug is fixed in Squid version 6.4. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. Those who you use a prepackaged version of Squid should refer to the package vendor for availability information on updated packages."}, {"lang": "es", "value": "Squid es un proxy de almacenamiento en cach\u00e9 para la Web. Debido a un error de validaci\u00f3n incorrecta del \u00edndice especificado, las versiones de Squid 3.3.0.1 a 5.9 y 6.0 anteriores a 6.4 compiladas usando `--with-openssl` son vulnerables a un ataque de Denegaci\u00f3n de Servicio contra la validaci\u00f3n del certificado SSL. Este problema permite que un servidor remoto realice una denegaci\u00f3n de servicio contra Squid Proxy iniciando un protocolo de enlace TLS con un certificado SSL especialmente manipulado en una cadena de certificados de servidor. Este ataque se limita a HTTPS y SSL-Bump. Este error se solucion\u00f3 en la versi\u00f3n 6.4 de Squid. Adem\u00e1s, los parches que solucionan este problema para las versiones estables se pueden encontrar en los archivos de parches de Squid. Aquellos que utilicen una versi\u00f3n empaquetada de Squid deben consultar al proveedor del paquete para obtener informaci\u00f3n sobre la disponibilidad de paquetes actualizados."}], "id": "CVE-2023-46724", "lastModified": "2026-06-17T06:31:25.280", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 4.0, "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-2023-46724", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-05T20:13:11.511935Z", "version": "2.0.3"}}]}, "published": "2023-11-01T20:15:08.800", "references": [{"source": "security-advisories@github.com", "tags": ["Mailing List", "Patch"], "url": "http://www.squid-cache.org/Versions/v5/SQUID-2023_4.patch"}, {"source": "security-advisories@github.com", "tags": ["Mailing List", "Patch"], "url": "http://www.squid-cache.org/Versions/v6/SQUID-2023_4.patch"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/squid-cache/squid/commit/b70f864940225dfe69f9f653f948e787f99c3810"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-73m6-jm96-c6r3"}, {"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-20231208-0001/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "http://www.squid-cache.org/Versions/v5/SQUID-2023_4.patch"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "http://www.squid-cache.org/Versions/v6/SQUID-2023_4.patch"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://github.com/squid-cache/squid/commit/b70f864940225dfe69f9f653f948e787f99c3810"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-73m6-jm96-c6r3"}, {"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-20231208-0001/"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-129"}, {"lang": "en", "value": "CWE-786"}, {"lang": "en", "value": "CWE-823"}, {"lang": "en", "value": "CWE-1285"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-295"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"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: Denial of Service in SSL Certificate validation", "id": "2247567", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2247567"}, "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-125|CWE-1285|CWE-129|CWE-786|CWE-823)", "details": ["Squid is a caching proxy for the Web. Due to an Improper Validation of Specified Index bug, Squid versions 3.3.0.1 through 5.9 and 6.0 prior to 6.4 compiled using `--with-openssl` are vulnerable to a Denial of Service attack against SSL Certificate validation. This problem allows a remote server to perform Denial of Service against Squid Proxy by initiating a TLS Handshake with a specially crafted SSL Certificate in a server certificate chain. This attack is limited to HTTPS and SSL-Bump. This bug is fixed in Squid version 6.4. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. Those who you use a prepackaged version of Squid should refer to the package vendor for availability information on updated packages.", "A flaw was found in Squid. Due to an improper validation of the specified index bug, Squid compiled using `--with-openssl` is vulnerable to a denial of service attack against SSL Certificate validation. This flaw allows a remote server to perform a denial of service against the Squid Proxy by initiating a TLS Handshake with a specially crafted SSL Certificate in a server certificate chain. This attack is limited to HTTPS and SSL-Bump."], "mitigation": {"lang": "en:us", "value": "Disable the use of SSL-Bump features:\n- Remove all ssl-bump options from http_port and https_port\n- Remove all ssl_bump directives from squid.conf"}, "name": "CVE-2023-46724", "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": "2023-11-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-46724\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-46724\nhttp://www.squid-cache.org/Versions/v5/SQUID-2023_4.patch\nhttp://www.squid-cache.org/Versions/v6/SQUID-2023_4.patch\nhttps://github.com/squid-cache/squid/commit/b70f864940225dfe69f9f653f948e787f99c3810\nhttps://github.com/squid-cache/squid/security/advisories/GHSA-73m6-jm96-c6r3"], "threat_severity": "Important"}

{}