{"id":"UBUNTU-CVE-2016-2181","details":"The Anti-Replay feature in the DTLS implementation in OpenSSL before 1.1.0 mishandles early use of a new epoch number in conjunction with a large sequence number, which allows remote attackers to cause a denial of service (false-positive packet drops) via spoofed DTLS records, related to rec_layer_d1.c and ssl3_record.c.","modified":"2026-02-04T03:59:50.471006Z","published":"2016-09-16T00:00:00Z","related":["USN-3087-1"],"upstream":["CVE-2016-2181"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-2181"},{"type":"REPORT","url":"https://www.openssl.org/news/secadv/20160922.txt"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3087-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-2181"}],"affected":[{"package":{"name":"openssl","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.0.1f-1ubuntu2.20?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.1f-1ubuntu2.20"}]}],"versions":["1.0.1e-3ubuntu1","1.0.1e-4ubuntu1","1.0.1e-4ubuntu2","1.0.1e-4ubuntu3","1.0.1e-4ubuntu4","1.0.1f-1ubuntu1","1.0.1f-1ubuntu2","1.0.1f-1ubuntu2.1","1.0.1f-1ubuntu2.2","1.0.1f-1ubuntu2.3","1.0.1f-1ubuntu2.4","1.0.1f-1ubuntu2.5","1.0.1f-1ubuntu2.7","1.0.1f-1ubuntu2.8","1.0.1f-1ubuntu2.11","1.0.1f-1ubuntu2.12","1.0.1f-1ubuntu2.15","1.0.1f-1ubuntu2.16","1.0.1f-1ubuntu2.17","1.0.1f-1ubuntu2.18","1.0.1f-1ubuntu2.19"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.0.1f-1ubuntu2.20","binary_name":"libssl-dev"},{"binary_version":"1.0.1f-1ubuntu2.20","binary_name":"libssl1.0.0"},{"binary_version":"1.0.1f-1ubuntu2.20","binary_name":"openssl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-2181.json"}},{"package":{"name":"openssl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.0.2g-1ubuntu4.4?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.2g-1ubuntu4.4"}]}],"versions":["1.0.2d-0ubuntu1","1.0.2d-0ubuntu2","1.0.2e-1ubuntu1","1.0.2f-2ubuntu1","1.0.2g-1ubuntu2","1.0.2g-1ubuntu3","1.0.2g-1ubuntu4","1.0.2g-1ubuntu4.1","1.0.2g-1ubuntu4.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.0.2g-1ubuntu4.4","binary_name":"libssl-dev"},{"binary_version":"1.0.2g-1ubuntu4.4","binary_name":"libssl1.0.0"},{"binary_version":"1.0.2g-1ubuntu4.4","binary_name":"openssl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-2181.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}