{"id":"CVE-2017-3733","aliases":["DEBIAN-CVE-2017-3733","EUVD-2017-12850","GHSA-6553-6v42-5wqc","MGASA-2017-0390","UBUNTU-CVE-2017-3733"],"status":"published","title":"Encrypt-Then-Mac renegotiation crash","description":"During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL 1.1.0 before 1.1.0e to crash (dependent on ciphersuite). Both clients and servers are affected.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.12874,"percentile":0.96328,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2017-05-04T19:00:00Z","modified":"2026-10-20T13:23:41Z","fixes":[{"ecosystem":"Debian:12","package":"openssl","fixed_in":["1.1.0e-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"openssl","fixed_in":["1.1.0e-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"openssl","fixed_in":["1.1.0e-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"openssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.0e-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"openssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.0e-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"openssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.0e-1"}]}]},{"source":"osv","ecosystem":"Mageia:5","package":"virtualbox","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.1.30-1.mga5"}]}],"bundled":8},{"source":"osv","ecosystem":"Mageia:5","package":"kmod-vboxadditions","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.1.30-1.mga5"}]}],"bundled":8},{"source":"osv","ecosystem":"Mageia:5","package":"kmod-virtualbox","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.1.30-1.mga5"}]}],"bundled":8},{"source":"osv","ecosystem":"Mageia:6","package":"virtualbox","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.1.30-1.mga6"}]}],"bundled":8},{"source":"osv","ecosystem":"Mageia:6","package":"kmod-vboxadditions","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.1.30-1.mga6"}]}],"bundled":8},{"source":"osv","ecosystem":"Mageia:6","package":"kmod-virtualbox","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.1.30-1.mga6"}]}],"bundled":8}],"products":[{"vendor":"hp","product":"operations_agent"},{"vendor":"openssl","product":"openssl"}],"references":[{"url":"http://www.securityfocus.com/bid/96269","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://www.openssl.org/news/secadv/20170216.txt","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","report"]},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html","tags":["x_refsource_CONFIRM","x_transferred","advisory"]},{"url":"https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US\u0026docId=emr_na-hpesbgn03728en_us","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html","tags":["x_refsource_CONFIRM","x_transferred","advisory"]},{"url":"https://github.com/openssl/openssl/commit/4ad93618d26a3ea23d36ad5498ff4f59eff3a4d2","tags":["x_refsource_MISC","x_transferred","fix"]},{"url":"http://www.securitytracker.com/id/1037846","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","web"]},{"url":"https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html","tags":["x_refsource_MISC","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-3733"},{"url":"https://github.com/advisories/GHSA-6553-6v42-5wqc"},{"url":"https://security-tracker.debian.org/tracker/CVE-2017-3733","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2017-0390.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=21901","tags":["report"]},{"url":"https://www.virtualbox.org/wiki/Changelog-5.1#v30","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2017-3733","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-3733","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2017-3733","title":"Encrypt-Then-Mac renegotiation crash","description":"During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL 1.1.0 before 1.1.0e to crash (dependent on ciphersuite). Both clients and servers are affected.","status":"published","published":"2017-05-04T19:00:00Z","modified":"2024-09-16T16:18:03.381Z","updated_at":"2026-11-02T14:33:16.232024Z"}],"euvd":[{"id":"EUVD-2017-12850","description":"During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL 1.1.0 before 1.1.0e to crash (dependent on ciphersuite). Both clients and servers are affected.","status":"published","published":"2017-05-04T19:00:00Z","modified":"2024-09-16T16:18:03Z","updated_at":"2026-11-03T00:55:53.022594Z"}],"ghsa":[{"id":"GHSA-6553-6v42-5wqc","title":"During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not...","description":"During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL 1.1.0 before 1.1.0e to crash (dependent on ciphersuite). Both clients and servers are affected.","status":"published","published":"2022-05-14T01:07:14Z","modified":"2023-02-02T05:02:59Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:51:32.869646Z"}],"nvd":[{"id":"CVE-2017-3733","description":"During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL 1.1.0 before 1.1.0e to crash (dependent on ciphersuite). Both clients and servers are affected.","status":"published","published":"2017-05-04T19:29:00.43Z","modified":"2026-06-17T01:18:48.77Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:03:47.848196Z"}],"osv":[{"id":"CVE-2017-3733","description":"During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL 1.1.0 before 1.1.0e to crash (dependent on ciphersuite). Both clients and servers are affected.","status":"published","published":"2017-05-04T19:29:00.43Z","modified":"2026-10-20T13:23:41.703422515Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:06.029968Z"},{"id":"DEBIAN-CVE-2017-3733","description":"During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL 1.1.0 before 1.1.0e to crash (dependent on ciphersuite). Both clients and servers are affected.","status":"published","published":"2017-05-04T19:29:00.43Z","modified":"2026-09-01T20:03:47.935829569Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:29.100767Z"},{"id":"UBUNTU-CVE-2017-3733","description":"During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL 1.1.0 before 1.1.0e to crash (dependent on ciphersuite). Both clients and servers are affected.","status":"withdrawn","published":"2017-05-04T19:29:00Z","modified":"2025-07-16T08:13:15.186817Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:15.388065Z"},{"id":"MGASA-2017-0390","title":"Updated virtualbox packages fix security vulnerabilities","description":"This update provides the virtualbox 5.1.30 maintenance release, fixing\nsecurity and other issues:\n\nIn OpenSSL 1.1.0 before 1.1.0d, if a malicious server supplies bad\nparameters for a DHE or ECDHE key exchange then this can result in\nthe client attempting to dereference a NULL pointer leading to a\nclient crash. This could be exploited in a Denial of Service attack\n(CVE-2017-3730).\n\nOpenSSL is vulnerable to a denial of service, caused by an out-of-bounds\nread when using a specific cipher. By sending specially crafted truncated\npackets, a remote attacker could exploit this vulnerability using\nCHACHA20/POLY1305 to cause the application to crash (CVE-2017-3731).\n\nOpenSSL could allow a remote attacker to obtain sensitive information,\ncaused by a propagation error in the BN_mod_exp() function. An attacker\ncould exploit this vulnerability to obtain information about the private\nkey (CVE-2017-3732).\n\nDuring a renegotiation handshake if the Encrypt-Then-Mac extension is\nnegotiated where it was not in the original handshake (or vice-versa)\nthen this can cause OpenSSL 1.1.0 before 1.1.0e to crash (dependent on\nciphersuite). Both clients and servers are affected (CVE-2017-3733)\n\nA local user can exploit a flaw in the Oracle VM VirtualBox Core component\nto partially access data, partially modify data, and deny service\n(CVE-2017-10392, CVE-2017-10407, CVE-2017-10408).\n\nA local user can exploit a flaw in the Oracle VM VirtualBox Core component\nto partially access data, partially modify data, and partially deny service\n(CVE-2017-10428).\n\nFor other fixes in this update see the referenced changelog.\n","status":"published","published":"2017-10-27T07:16:04Z","modified":"2026-04-16T06:26:04.524149011Z","updated_at":"2026-11-02T15:49:40.442238Z"}]}}