{"id":"CVE-2015-8960","aliases":["EUVD-2015-8816","GHSA-wxvr-h7g5-rfc7"],"status":"published","title":"The TLS protocol 1.2 and earlier supports the rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh, and...","description":"The TLS protocol 1.2 and earlier supports the rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh, and ecdsa_fixed_ecdh values for ClientCertificateType but does not directly document the ability to compute the master secret in certain situations with a client secret key and server public key but not a server secret key, which makes it easier for man-in-the-middle attackers to spoof TLS servers by leveraging knowledge of the secret key for an arbitrary installed client X.509 certificate, aka the \"Key Compromise Impersonation (KCI)\" issue.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01947,"percentile":0.80337,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2016-09-21T01:00:00Z","modified":"2026-06-17T00:35:34Z","products":[{"vendor":"ietf","product":"transport_layer_security"},{"vendor":"netapp","product":"clustered_data_ontap_antivirus_connector"},{"vendor":"netapp","product":"data_ontap_edge"},{"vendor":"netapp","product":"host_agent"},{"vendor":"netapp","product":"oncommand_shift"},{"vendor":"netapp","product":"plug-in_for_symantec_netbackup"},{"vendor":"netapp","product":"smi-s_provider"},{"vendor":"netapp","product":"snap_creator_framework"},{"vendor":"netapp","product":"snapdrive"},{"vendor":"netapp","product":"snapmanager"},{"vendor":"netapp","product":"snapprotect"},{"vendor":"netapp","product":"solidfire_\\\u0026_hci_management_node"},{"vendor":"netapp","product":"system_setup"}],"references":[{"url":"http://www.openwall.com/lists/oss-security/2016/09/20/4","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Technical Description","Third Party Advisory"]},{"url":"http://twitter.com/matthew_d_green/statuses/630908726950674433","tags":["x_refsource_MISC","x_transferred","Press/Media Coverage","Technical Description","Third Party Advisory"]},{"url":"http://www.securityfocus.com/bid/93071","tags":["vdb-entry","x_refsource_BID","x_transferred","Broken Link","Third Party Advisory","VDB Entry"]},{"url":"https://security.netapp.com/advisory/ntap-20180626-0002/","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory"]},{"url":"https://www.usenix.org/system/files/conference/woot15/woot15-paper-hlauschek.pdf","tags":["x_refsource_MISC","x_transferred","Exploit","Mitigation","Technical Description"]},{"url":"https://kcitls.org","tags":["x_refsource_MISC","x_transferred","Exploit","Technical Description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2015-8960"},{"url":"https://security.netapp.com/advisory/ntap-20180626-0002"},{"url":"https://github.com/advisories/GHSA-wxvr-h7g5-rfc7"}],"sources":{"cve":[{"id":"CVE-2015-8960","description":"The TLS protocol 1.2 and earlier supports the rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh, and ecdsa_fixed_ecdh values for ClientCertificateType but does not directly document the ability to compute the master secret in certain situations with a client secret key and server public key but not a server secret key, which makes it easier for man-in-the-middle attackers to spoof TLS servers by leveraging knowledge of the secret key for an arbitrary installed client X.509 certificate, aka the \"Key Compromise Impersonation (KCI)\" issue.","status":"published","published":"2016-09-21T01:00:00Z","modified":"2024-08-06T08:36:30.681Z","updated_at":"2026-11-02T14:35:40.900357Z"}],"euvd":[{"id":"EUVD-2015-8816","description":"The TLS protocol 1.2 and earlier supports the rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh, and ecdsa_fixed_ecdh values for ClientCertificateType but does not directly document the ability to compute the master secret in certain situations with a client secret key and server public key but not a server secret key, which makes it easier for man-in-the-middle attackers to spoof TLS servers by leveraging knowledge of the secret key for an arbitrary installed client X.509 certificate, aka the \"Key Compromise Impersonation (KCI)\" issue.","status":"published","published":"2016-09-21T01:00:00Z","modified":"2024-08-06T08:36:30Z","updated_at":"2026-11-03T01:57:25.349664Z"}],"ghsa":[{"id":"GHSA-wxvr-h7g5-rfc7","title":"The TLS protocol 1.2 and earlier supports the rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh, and...","description":"The TLS protocol 1.2 and earlier supports the rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh, and ecdsa_fixed_ecdh values for ClientCertificateType but does not directly document the ability to compute the master secret in certain situations with a client secret key and server public key but not a server secret key, which makes it easier for man-in-the-middle attackers to spoof TLS servers by leveraging knowledge of the secret key for an arbitrary installed client X.509 certificate, aka the \"Key Compromise Impersonation (KCI)\" issue.","status":"published","published":"2022-05-14T03:15:57Z","modified":"2025-04-12T13:05:26Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T15:01:29.780856Z"}],"nvd":[{"id":"CVE-2015-8960","description":"The TLS protocol 1.2 and earlier supports the rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh, and ecdsa_fixed_ecdh values for ClientCertificateType but does not directly document the ability to compute the master secret in certain situations with a client secret key and server public key but not a server secret key, which makes it easier for man-in-the-middle attackers to spoof TLS servers by leveraging knowledge of the secret key for an arbitrary installed client X.509 certificate, aka the \"Key Compromise Impersonation (KCI)\" issue.","status":"published","published":"2016-09-21T02:59:00.133Z","modified":"2026-06-17T00:35:34.183Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:03:16.97467Z"}]}}