{"id":"CVE-2016-10027","aliases":["EUVD-2016-1224","GHSA-66pq-hqv5-228g"],"status":"published","title":"Smack allows the bypass of TLS protections","description":"Race condition in the XMPP library in Smack before 4.1.9, when the SecurityMode.required TLS setting has been set, allows man-in-the-middle attackers to bypass TLS protections and trigger use of cleartext for client authentication by stripping the \"starttls\" feature from a server response.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01513,"percentile":0.74659,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-362"],"published":"2017-01-12T23:00:00Z","modified":"2026-10-20T13:13:35Z","fixes":[{"ecosystem":"Maven","package":"org.igniterealtime.smack:smack-core","fixed_in":["4.1.9"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"org.igniterealtime.smack:smack-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.9"}]}]},{"source":"osv","ecosystem":"Maven","package":"org.igniterealtime.smack:smack-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.9"}]}],"versions":["4.0.0","4.0.0-rc1","4.0.0-rc2","4.0.1","4.0.2","4.0.3","4.0.4","4.0.5","4.0.6","4.0.7","4.1.0","4.1.0-alpha1","4.1.0-alpha2","4.1.0-alpha3","4.1.0-alpha4","4.1.0-alpha5","4.1.0-alpha6","4.1.0-beta1","4.1.0-beta2","4.1.0-rc1","4.1.0-rc2","4.1.0-rc3","4.1.0-rc4","4.1.0-rc5","4.1.1","4.1.2","4.1.3","4.1.4","4.1.5","4.1.6","4.1.7","4.1.8"]}],"products":[{"vendor":"fedoraproject","product":"fedora"},{"vendor":"igniterealtime","product":"smack"}],"references":[{"url":"https://github.com/igniterealtime/Smack/commit/059ee99ba0d5ff7758829acf5a9aeede09ec820b","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J4WXAZ4JVJXHMEDDXJVWJHPVBF5QCTZF/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"http://www.securityfocus.com/bid/95129","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://issues.igniterealtime.org/projects/SMACK/issues/SMACK-739","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Vendor Advisory","report","web"]},{"url":"https://github.com/igniterealtime/Smack/commit/a9d5cd4a611f47123f9561bc5a81a4555fe7cb04","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"http://www.openwall.com/lists/oss-security/2016/12/22/12","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Patch","Third Party Advisory","fix","web"]},{"url":"https://community.igniterealtime.org/blogs/ignite/2016/11/22/smack-security-advisory-2016-11-22","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-10027","tags":["advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J4WXAZ4JVJXHMEDDXJVWJHPVBF5QCTZF","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J4WXAZ4JVJXHMEDDXJVWJHPVBF5QCTZF","tags":["web"]},{"url":"https://github.com/advisories/GHSA-66pq-hqv5-228g"},{"url":"https://github.com/igniterealtime/Smack","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2016-10027","description":"Race condition in the XMPP library in Smack before 4.1.9, when the SecurityMode.required TLS setting has been set, allows man-in-the-middle attackers to bypass TLS protections and trigger use of cleartext for client authentication by stripping the \"starttls\" feature from a server response.","status":"published","published":"2017-01-12T23:00:00Z","modified":"2024-08-06T03:07:31.883Z","updated_at":"2026-11-02T14:33:31.117878Z"}],"euvd":[{"id":"EUVD-2016-1224","description":"Race condition in the XMPP library in Smack before 4.1.9, when the SecurityMode.required TLS setting has been set, allows man-in-the-middle attackers to bypass TLS protections and trigger use of cleartext for client authentication by stripping the \"starttls\" feature from a server response.","status":"published","published":"2017-01-12T23:00:00Z","modified":"2024-08-06T03:07:31Z","updated_at":"2026-11-03T02:22:25.285099Z"}],"ghsa":[{"id":"GHSA-66pq-hqv5-228g","title":"Smack allows the bypass of TLS protections","description":"Race condition in the XMPP library in Smack before 4.1.9, when the SecurityMode.required TLS setting has been set, allows man-in-the-middle attackers to bypass TLS protections and trigger use of cleartext for client authentication by stripping the \"starttls\" feature from a server response.","status":"published","published":"2022-05-13T01:11:39Z","modified":"2025-04-21T22:50:57Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:38:40.628275Z"}],"nvd":[{"id":"CVE-2016-10027","description":"Race condition in the XMPP library in Smack before 4.1.9, when the SecurityMode.required TLS setting has been set, allows man-in-the-middle attackers to bypass TLS protections and trigger use of cleartext for client authentication by stripping the \"starttls\" feature from a server response.","status":"published","published":"2017-01-12T23:59:00.197Z","modified":"2026-06-17T00:38:54.84Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:03:33.686843Z"}],"osv":[{"id":"CVE-2016-10027","description":"Race condition in the XMPP library in Smack before 4.1.9, when the SecurityMode.required TLS setting has been set, allows man-in-the-middle attackers to bypass TLS protections and trigger use of cleartext for client authentication by stripping the \"starttls\" feature from a server response.","status":"published","published":"2017-01-12T23:59:00.197Z","modified":"2026-10-20T13:13:35.460939671Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:01.531338Z"},{"id":"GHSA-66pq-hqv5-228g","title":"Smack allows the bypass of TLS protections","description":"Race condition in the XMPP library in Smack before 4.1.9, when the SecurityMode.required TLS setting has been set, allows man-in-the-middle attackers to bypass TLS protections and trigger use of cleartext for client authentication by stripping the \"starttls\" feature from a server response.","status":"published","published":"2022-05-13T01:11:39Z","modified":"2025-04-21T23:42:10.681981Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T15:46:39.266402Z"}]}}