CVE-2016-3947

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ICMPv6."}], "id": "CVE-2016-3947", "lastModified": "2026-06-17T00:46:36.943", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": 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{"bugzilla": {"description": "squid: buffer overrun in Squid proxy pinger", "id": "1323590", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1323590"}, "csaw": false, "cvss": {"cvss_base_score": "5.8", "cvss_scoring_vector": "AV:N/AC:M/Au:N/C:N/I:P/A:P", "status": "draft"}, "cwe": "CWE-122", "details": ["Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial of service (performance degradation or transition failures) or write sensitive information to log files via an ICMPv6 packet."], "name": "CVE-2016-3947", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "squid", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "squid", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "squid", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2016-04-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2016-3947\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-3947\nhttp://www.squid-cache.org/Advisories/SQUID-2016_3.txt"], "statement": "This issue did not affect the versions of squid as shipped with Red Hat Enterprise Linux 5, 6 and 7 as they did not include support for ICMP pinging and the 'pinger' binary.", "threat_severity": "Important"}

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