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{"criteria": "cpe:2.3:a:squid-cache:squid:3.1.7:*:*:*:*:*:*:*", "matchCriteriaId": "78A6D6B0-9BC0-418E-84EE-23697A0FEC19", "vulnerable": true}, {"criteria": "cpe:2.3:a:squid-cache:squid:3.1.8:*:*:*:*:*:*:*", "matchCriteriaId": "5BF7AFE1-A45A-43B7-B3C7-45C060D046BC", "vulnerable": true}, {"criteria": "cpe:2.3:a:squid-cache:squid:3.1.9:*:*:*:*:*:*:*", "matchCriteriaId": "41914354-D5BE-4B1F-BED3-0ECA43586537", "vulnerable": true}, {"criteria": "cpe:2.3:a:squid-cache:squid:3.1.10:*:*:*:*:*:*:*", "matchCriteriaId": "AE9A3716-8670-4847-A6EB-F601184D369E", "vulnerable": true}, {"criteria": "cpe:2.3:a:squid-cache:squid:3.1.11:*:*:*:*:*:*:*", "matchCriteriaId": "D0E88EE3-EC00-4F1F-BAEF-4F1F893C5C5F", "vulnerable": true}, {"criteria": "cpe:2.3:a:squid-cache:squid:3.1.12:*:*:*:*:*:*:*", "matchCriteriaId": "A330DFA8-BF79-45CC-BF88-6CEA26D7BC9E", "vulnerable": true}, {"criteria": "cpe:2.3:a:squid-cache:squid:3.1.13:*:*:*:*:*:*:*", "matchCriteriaId": "679A55F8-34B4-435A-8BCE-8F842F3FB269", "vulnerable": true}, {"criteria": "cpe:2.3:a:squid-cache:squid:3.1.14:*:*:*:*:*:*:*", "matchCriteriaId": "898674F9-6BF7-469F-A74E-558EAFC2CD27", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The idnsGrokReply function in Squid before 3.1.16 does not properly free memory, which allows remote attackers to cause a denial of service (daemon abort) via a DNS reply containing a CNAME record that references another CNAME record that contains an empty A record."}, {"lang": "es", "value": "La funci\u00f3n idnsGrokReply en Squid anterior a v3.1.16 no adecuada de memoria libre, permite a atacantes remotos provocar una denegaci\u00f3n de servicio (daemon abortar) a trav\u00e9s de una respuesta DNS que contiene un registro CNAME que hace referencia a otro registro CNAME y este contiene un registro vac\u00edo."}], "id": "CVE-2011-4096", "lastModified": "2025-04-11T00:51:21.963", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}]}, "published": "2011-11-17T19:55:01.453", "references": [{"source": "secalert@redhat.com", "url": "http://bugs.squid-cache.org/show_bug.cgi?id=3237#c12"}, {"source": "secalert@redhat.com", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html"}, {"source": "secalert@redhat.com", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "http://secunia.com/advisories/46609"}, {"source": "secalert@redhat.com", "url": "http://secunia.com/advisories/47459"}, {"source": "secalert@redhat.com", "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:193"}, {"source": "secalert@redhat.com", "url": "http://www.openwall.com/lists/oss-security/2011/10/31/5"}, {"source": "secalert@redhat.com", "url": "http://www.openwall.com/lists/oss-security/2011/11/01/3"}, {"source": "secalert@redhat.com", "url": "http://www.redhat.com/support/errata/RHSA-2011-1791.html"}, {"source": "secalert@redhat.com", "url": "http://www.securitytracker.com/id?1026265"}, {"source": "secalert@redhat.com", "url": "http://www.squid-cache.org/Versions/v3/3.1/changesets/SQUID_3_1_16.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://bugs.squid-cache.org/show_bug.cgi?id=3237#c12"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "http://secunia.com/advisories/46609"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://secunia.com/advisories/47459"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:193"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2011/10/31/5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2011/11/01/3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.redhat.com/support/errata/RHSA-2011-1791.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securitytracker.com/id?1026265"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.squid-cache.org/Versions/v3/3.1/changesets/SQUID_3_1_16.html"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-399"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2011:1791", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "squid-7:3.1.10-1.el6_2.1", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2011-12-06T00:00:00Z"}], "bugzilla": {"description": "squid: Invalid free by processing CNAME DNS record pointing to another CNAME record pointing to an empty A-record", "id": "750316", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=750316"}, "csaw": false, "cvss": {"cvss_base_score": "3.3", "cvss_scoring_vector": "AV:A/AC:L/Au:N/C:N/I:N/A:P", "status": "verified"}, "details": ["The idnsGrokReply function in Squid before 3.1.16 does not properly free memory, which allows remote attackers to cause a denial of service (daemon abort) via a DNS reply containing a CNAME record that references another CNAME record that contains an empty A record."], "name": "CVE-2011-4096", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:4", "fix_state": "Not affected", "package_name": "squid", "product_name": "Red Hat Enterprise Linux 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "squid", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2011-06-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2011-4096\nhttps://nvd.nist.gov/vuln/detail/CVE-2011-4096"], "statement": "This issue did not affect the versions of squid as shipped with Red Hat Enterprise Linux 4 and 5 as they did not include IPv6 support. This issue was introduced with the addition of IPv6 support in Squid 3.1 (in the changes made to the idnsGrokReply function).", "threat_severity": "Moderate"}