{"id":"UBUNTU-CVE-2014-3511","details":"The ssl23_get_client_hello function in s23_srvr.c in OpenSSL 1.0.1 before 1.0.1i allows man-in-the-middle attackers to force the use of TLS 1.0 by triggering ClientHello message fragmentation in communication between a client and server that both support later TLS versions, related to a \"protocol downgrade\" issue.","modified":"2026-04-22T09:39:59.111841Z","published":"2014-08-07T00:00:00Z","related":["USN-2308-1"],"upstream":["CVE-2014-3511"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2014-3511"},{"type":"REPORT","url":"https://www.openssl.org/news/secadv_20140806.txt"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2308-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2014-3511"}],"affected":[{"package":{"name":"openssl","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.0.1f-1ubuntu2.5?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.1f-1ubuntu2.5"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"libssl1.0.0","binary_version":"1.0.1f-1ubuntu2.5"},{"binary_name":"openssl","binary_version":"1.0.1f-1ubuntu2.5"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2014/UBUNTU-CVE-2014-3511.json"}}],"schema_version":"1.7.5","severity":[{"type":"Ubuntu","score":"medium"}]}