{"id":"CVE-2016-4745","aliases":["EUVD-2016-5730","GHSA-895f-xj7j-vc89"],"status":"published","title":"The Kerberos 5 (aka krb5) PAM module in Apple OS X before 10.12 does not use constant-time...","description":"The Kerberos 5 (aka krb5) PAM module in Apple OS X before 10.12 does not use constant-time operations for determining username validity, which makes it easier for remote attackers to enumerate user accounts via a timing side-channel attack.","severity":{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01759,"percentile":0.7813,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200"],"published":"2016-09-25T10:00:00Z","modified":"2026-06-17T00:48:08Z","products":[{"vendor":"apple","product":"mac_os_x"}],"references":[{"url":"http://www.securitytracker.com/id/1036858","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html","tags":["vendor-advisory","x_refsource_APPLE","x_transferred","Mailing List","Vendor Advisory"]},{"url":"http://www.securityfocus.com/bid/93055","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"https://support.apple.com/HT207170","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-4745"},{"url":"https://github.com/advisories/GHSA-895f-xj7j-vc89"}],"sources":{"cve":[{"id":"CVE-2016-4745","description":"The Kerberos 5 (aka krb5) PAM module in Apple OS X before 10.12 does not use constant-time operations for determining username validity, which makes it easier for remote attackers to enumerate user accounts via a timing side-channel attack.","status":"published","published":"2016-09-25T10:00:00Z","modified":"2024-08-06T00:39:26.028Z","updated_at":"2026-11-02T14:33:35.149563Z"}],"euvd":[{"id":"EUVD-2016-5730","description":"The Kerberos 5 (aka krb5) PAM module in Apple OS X before 10.12 does not use constant-time operations for determining username validity, which makes it easier for remote attackers to enumerate user accounts via a timing side-channel attack.","status":"published","published":"2016-09-25T10:00:00Z","modified":"2024-08-06T00:39:26Z","updated_at":"2026-11-03T02:22:45.348111Z"}],"ghsa":[{"id":"GHSA-895f-xj7j-vc89","title":"The Kerberos 5 (aka krb5) PAM module in Apple OS X before 10.12 does not use constant-time...","description":"The Kerberos 5 (aka krb5) PAM module in Apple OS X before 10.12 does not use constant-time operations for determining username validity, which makes it easier for remote attackers to enumerate user accounts via a timing side-channel attack.","status":"published","published":"2022-05-17T02:22:12Z","modified":"2023-01-27T05:04:50Z","cvss":[{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:42:34.018822Z"}],"nvd":[{"id":"CVE-2016-4745","description":"The Kerberos 5 (aka krb5) PAM module in Apple OS X before 10.12 does not use constant-time operations for determining username validity, which makes it easier for remote attackers to enumerate user accounts via a timing side-channel attack.","status":"published","published":"2016-09-25T10:59:44.987Z","modified":"2026-06-17T00:48:08.623Z","cvss":[{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:03:29.893676Z"}]}}