CVE-2026-32748

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"version": "7:5.5-19.el9_6.3", "versionType": "rpm"}]}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:6"], "defaultStatus": "unknown", "packageName": "squid", "product": "Red Hat Enterprise Linux 6", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:6"], "defaultStatus": "unknown", "packageName": "squid34", "product": "Red Hat Enterprise Linux 6", "vendor": "Red Hat"}], "datePublic": "2026-03-26T00:11:01.424Z", "descriptions": [{"lang": "en", "value": "A flaw was found in Squid. 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This can be achieved by commenting out or setting `icp_port` to `0` in the `squid.conf` file. After modifying the configuration, the Squid service must be reloaded or restarted for the changes to take effect.\n\nExample:\n```\n# icp_port 3130\n```\nor\n```\nicp_port 0\n```\nWarning: Reloading or restarting the Squid service may temporarily interrupt proxy services."}], "x_adpType": "supplier", "x_generator": {"engine": "sadp-cli 1.0.0"}, "providerMetadata": {"orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-07-15T01:07:40.483Z"}}]}}

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"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*", "matchCriteriaId": "9F62FE66-3319-4718-BD42-B374264D81E8", "versionEndExcluding": "7.5", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Squid is a caching proxy for the Web. Prior to version 7.5, due to premature release of resource during expected lifetime and heap Use-After-Free bugs, Squid is vulnerable to Denial of Service when handling ICP traffic. This problem allows a remote attacker to perform a reliable and repeatable Denial of Service attack against the Squid service using ICP protocol. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero `icp_port`). This problem _cannot_ be mitigated by denying ICP queries using `icp_access` rules. This bug is fixed in Squid version 7.5."}, {"lang": "es", "value": "Squid es un proxy de almacenamiento en cach\u00e9 para la Web. Antes de la versi\u00f3n 7.5, debido a la liberaci\u00f3n prematura de recursos durante la vida \u00fatil esperada y errores de uso despu\u00e9s de liberaci\u00f3n en el heap, Squid es vulnerable a denegaci\u00f3n de servicio al manejar tr\u00e1fico ICP. Este problema permite a un atacante remoto realizar un ataque de denegaci\u00f3n de servicio fiable y repetible contra el servicio Squid usando el protocolo ICP. Este ataque est\u00e1 limitado a despliegues de Squid que habilitan expl\u00edcitamente el soporte ICP (es decir, configurar un 'icp_port' distinto de cero). Este problema _no puede_ ser mitigado denegando consultas ICP usando reglas de 'icp_access'. Este error est\u00e1 corregido en la versi\u00f3n 7.5 de Squid."}], "id": "CVE-2026-32748", "lastModified": "2026-07-15T02:20:00.957", "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": "nvd@nist.gov", "type": "Primary"}, {"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"}, 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{"bugzilla": {"description": "Squid: Squid: Denial of Service via crafted ICP traffic", "id": "2451577", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451577"}, "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": "draft"}, "cwe": "CWE-826", "details": ["A flaw was found in Squid. A remote attacker can exploit this vulnerability by sending specially crafted ICP (Internet Cache Protocol) traffic. This can lead to a Denial of Service (DoS) due to premature resource release and use-after-free vulnerabilities. This attack is possible in Squid deployments with explicitly enabled ICP support."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, ensure that ICP support is not explicitly enabled in the Squid configuration. This can be achieved by commenting out or setting `icp_port` to `0` in the `squid.conf` file. After modifying the configuration, the Squid service must be reloaded or restarted for the changes to take effect.\nExample:\n```\n# icp_port 3130\n```\nor\n```\nicp_port 0\n```\nWarning: Reloading or restarting the Squid service may temporarily interrupt proxy services."}, "name": "CVE-2026-32748", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "squid", "product_name": "Red Hat Enterprise Linux 10"}, {"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"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "squid", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "squid:4/squid", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "squid", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-03-26T00:11:01Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-32748\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-32748\nhttp://www.openwall.com/lists/oss-security/2026/03/25/3\nhttps://github.com/squid-cache/squid/commit/703e07d25ca6fa11f52d20bf0bb879e22ab7481b\nhttps://github.com/squid-cache/squid/security/advisories/GHSA-f9p7-3jqg-hhvq"], "statement": "This Important flaw in Squid can lead to a Denial of Service when processing specially crafted Internet Cache Protocol (ICP) traffic. This vulnerability affects Red Hat products running Squid if ICP support is explicitly enabled by configuring a non-zero `icp_port`. Deployments where ICP is not enabled by default are not affected.", "threat_severity": "Important"}

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