{"id":"CVE-2016-3947","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-3947","generatedAt":"2026-11-05T05:35:26.772Z","title":"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…","description":"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.","published":"2016-04-07T18:59:00.000Z","lastModified":"2026-06-17T00:46:37.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":8.2,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},"cwe":["CWE-119"],"affected":["squid-cache/squid","canonical/ubuntu linux"],"epss":{"score":0.1462,"percentile":0.96665,"date":"2026-11-04","history":[{"date":"2026-09-21","score":0.30621,"percentile":0.98205},{"date":"2026-09-22","score":0.1462,"percentile":0.96496}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 14.6%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-21T00:00:00.000Z","detail":{"to":0.30621,"from":0.1462,"percentile":0.98205},"summary":"EPSS moved from 14.6% to 30.6% probability of exploitation in the next thirty days."}],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html","source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html","source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html","source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id/1035457","source":"cve@mitre.org"},{"url":"http://www.squid-cache.org/Advisories/SQUID-2016_3.txt","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10495.patch","tags":["Patch"],"source":"cve@mitre.org"},{"url":"http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11839.patch","tags":["Patch","Third Party Advisory","US Government Resource"],"source":"cve@mitre.org"},{"url":"http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12694.patch","tags":["Patch"],"source":"cve@mitre.org"},{"url":"http://www.squid-cache.org/Versions/v3/3.4/changesets/squid-3.4-13232.patch","tags":["Patch"],"source":"cve@mitre.org"},{"url":"http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-14015.patch","tags":["Patch"],"source":"cve@mitre.org"},{"url":"http://www.ubuntu.com/usn/USN-2995-1","source":"cve@mitre.org"},{"url":"https://security.gentoo.org/glsa/201607-01","source":"cve@mitre.org"},{"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"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1035457","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.squid-cache.org/Advisories/SQUID-2016_3.txt","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10495.patch","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11839.patch","tags":["Patch","Third Party Advisory","US Government Resource"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12694.patch","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.squid-cache.org/Versions/v3/3.4/changesets/squid-3.4-13232.patch","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-14015.patch","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-2995-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201607-01","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-3947","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}