{"id":"CVE-2006-4403","aliases":["EUVD-2006-4391","GHSA-46x7-8pwm-5h5x"],"status":"published","title":"The FTP server in Apple Mac OS X 10.4.8 and earlier, when FTP Access is enabled, will crash when...","description":"The FTP server in Apple Mac OS X 10.4.8 and earlier, when FTP Access is enabled, will crash when a login failure occurs with a valid user name, which allows remote attackers to cause a denial of service (crash) and enumerate valid usernames.","severity":{"version":"2.0","score":4,"vector":"AV:N/AC:H/Au:N/C:P/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03732,"percentile":0.89902,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2006-11-30T16:00:00Z","modified":"2026-06-16T22:29:02Z","products":[{"vendor":"apple","product":"mac_os_x"}],"references":[{"url":"http://www.osvdb.org/30734","tags":["vdb-entry","x_refsource_OSVDB","x_transferred"]},{"url":"http://www.vupen.com/english/advisories/2006/4750","tags":["vdb-entry","x_refsource_VUPEN","x_transferred"]},{"url":"http://securitytracker.com/id?1017303","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"http://docs.info.apple.com/article.html?artnum=304829","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://www.securityfocus.com/bid/21335","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/30621","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://secunia.com/advisories/23155","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory"]},{"url":"http://www.kb.cert.org/vuls/id/371648","tags":["third-party-advisory","x_refsource_CERT-VN","x_transferred","US Government Resource"]},{"url":"http://lists.apple.com/archives/security-announce/2006/Nov/msg00001.html","tags":["vendor-advisory","x_refsource_APPLE","x_transferred"]},{"url":"http://www.us-cert.gov/cas/techalerts/TA06-333A.html","tags":["third-party-advisory","x_refsource_CERT","x_transferred","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2006-4403"},{"url":"https://github.com/advisories/GHSA-46x7-8pwm-5h5x"}],"sources":{"cve":[{"id":"CVE-2006-4403","description":"The FTP server in Apple Mac OS X 10.4.8 and earlier, when FTP Access is enabled, will crash when a login failure occurs with a valid user name, which allows remote attackers to cause a denial of service (crash) and enumerate valid usernames.","status":"published","published":"2006-11-30T16:00:00Z","modified":"2024-08-07T19:06:07.646Z","updated_at":"2026-11-02T14:33:51.085765Z"}],"euvd":[{"id":"EUVD-2006-4391","description":"The FTP server in Apple Mac OS X 10.4.8 and earlier, when FTP Access is enabled, will crash when a login failure occurs with a valid user name, which allows remote attackers to cause a denial of service (crash) and enumerate valid usernames.","status":"published","published":"2006-11-30T16:00:00Z","modified":"2024-08-07T19:06:07Z","updated_at":"2026-11-03T01:15:52.149607Z"}],"ghsa":[{"id":"GHSA-46x7-8pwm-5h5x","title":"The FTP server in Apple Mac OS X 10.4.8 and earlier, when FTP Access is enabled, will crash when...","description":"The FTP server in Apple Mac OS X 10.4.8 and earlier, when FTP Access is enabled, will crash when a login failure occurs with a valid user name, which allows remote attackers to cause a denial of service (crash) and enumerate valid usernames.","status":"published","published":"2022-05-01T07:18:21Z","modified":"2023-01-31T05:02:06Z","updated_at":"2026-11-02T14:48:11.509294Z"}],"nvd":[{"id":"CVE-2006-4403","description":"The FTP server in Apple Mac OS X 10.4.8 and earlier, when FTP Access is enabled, will crash when a login failure occurs with a valid user name, which allows remote attackers to cause a denial of service (crash) and enumerate valid usernames.","status":"published","published":"2006-11-30T16:28:00Z","modified":"2026-06-16T22:29:02.217Z","cvss":[{"version":"2.0","score":4,"vector":"AV:N/AC:H/Au:N/C:P/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:01:08.546281Z"}]}}