{"id":"CVE-2016-4970","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-4970","generatedAt":"2026-11-05T04:52:47.044Z","title":"handler/ssl/OpenSslEngine.java in Netty 4.0.x before 4.0.37.Final and 4.1.x before 4.1.1.Final allows remote attackers to cause a denial of service (infinite loop).","description":"handler/ssl/OpenSslEngine.java in Netty 4.0.x before 4.0.37.Final and 4.1.x before 4.1.1.Final allows remote attackers to cause a denial of service (infinite loop).","published":"2017-04-13T14:59:02.000Z","lastModified":"2026-06-17T00:48:32.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-835"],"affected":["netty/netty","redhat/jboss data grid","redhat/jboss middleware text-only advisories","apache/cassandra"],"epss":{"score":0.11259,"percentile":0.95981,"date":"2026-11-04","history":[]},"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 11.3%, higher than 96% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://netty.io/news/2016/06/07/4-0-37-Final.html","tags":["Release Notes","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://netty.io/news/2016/06/07/4-1-1-Final.html","tags":["Release Notes","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2017-0179.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2017-1097.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/96540","tags":["Third Party Advisory","VDB Entry"],"source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1343616","tags":["Issue Tracking","Third Party Advisory","VDB Entry"],"source":"secalert@redhat.com"},{"url":"https://github.com/netty/netty/pull/5364","tags":["Patch","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://lists.apache.org/thread.html/afaa5860e3a6d327eb96c3d82cbd2f5996de815a16854ed1ad310144%40%3Ccommits.cassandra.apache.org%3E","source":"secalert@redhat.com"},{"url":"https://wiki.opendaylight.org/view/Security_Advisories","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://netty.io/news/2016/06/07/4-0-37-Final.html","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://netty.io/news/2016/06/07/4-1-1-Final.html","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2017-0179.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2017-1097.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/96540","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1343616","tags":["Issue Tracking","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/netty/netty/pull/5364","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/afaa5860e3a6d327eb96c3d82cbd2f5996de815a16854ed1ad310144%40%3Ccommits.cassandra.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://wiki.opendaylight.org/view/Security_Advisories","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-4970","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."}