{"id":"CVE-2001-1013","aliases":["EUVD-2001-0994","GHSA-ww47-4c2p-jhj9"],"status":"published","title":"Apache on Red Hat Linux with with the UserDir directive enabled generates different error codes...","description":"Apache on Red Hat Linux with with the UserDir directive enabled generates different error codes when a username exists and there is no public_html directory and when the username does not exist, which could allow remote attackers to determine valid usernames on the server.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.65563,"percentile":0.99268,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"published":"2001-09-12T04:00:00Z","modified":"2026-06-16T21:55:24Z","exploits":[{"source":"exploitdb","id":"EDB-21112","title":"RedHat Linux 7.0 Apache - Remote Username Enumeration","type":"remote","platform":"linux","date":"2001-09-12","verified":true,"url":"https://www.exploit-db.com/exploits/21112"},{"source":"metasploit","id":"auxiliary/scanner/http/apache_userdir_enum","title":"Apache \"mod_userdir\" User Enumeration","type":"auxiliary","verified":true,"url":"https://www.rapid7.com/db/modules/auxiliary/scanner/http/apache_userdir_enum"}],"products":[{"vendor":"redhat","product":"linux"}],"references":[{"url":"http://www.securityfocus.com/bid/3335","tags":["vdb-entry","x_refsource_BID","x_transferred","Exploit","Patch","Vendor Advisory"]},{"url":"http://www.securityfocus.com/archive/1/213667","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred","Vendor Advisory"]},{"url":"http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0094.html","tags":["mailing-list","x_refsource_VULN-DEV","x_transferred","Vendor Advisory"]},{"url":"http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0083.html","tags":["mailing-list","x_refsource_VULN-DEV","x_transferred","Vendor Advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/7129","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0087.html","tags":["mailing-list","x_refsource_VULN-DEV","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2001-1013"},{"url":"https://github.com/advisories/GHSA-ww47-4c2p-jhj9"}],"sources":{"cve":[{"id":"CVE-2001-1013","description":"Apache on Red Hat Linux with with the UserDir directive enabled generates different error codes when a username exists and there is no public_html directory and when the username does not exist, which could allow remote attackers to determine valid usernames on the server.","status":"published","published":"2002-02-02T05:00:00Z","modified":"2024-08-08T04:44:06.462Z","updated_at":"2026-11-02T14:34:42.680977Z"}],"euvd":[{"id":"EUVD-2001-0994","description":"Apache on Red Hat Linux with with the UserDir directive enabled generates different error codes when a username exists and there is no public_html directory and when the username does not exist, which could allow remote attackers to determine valid usernames on the server.","status":"published","published":"2002-02-02T05:00:00Z","modified":"2024-08-08T04:44:06Z","updated_at":"2026-11-03T01:14:49.089023Z"}],"ghsa":[{"id":"GHSA-ww47-4c2p-jhj9","title":"Apache on Red Hat Linux with with the UserDir directive enabled generates different error codes...","description":"Apache on Red Hat Linux with with the UserDir directive enabled generates different error codes when a username exists and there is no public_html directory and when the username does not exist, which could allow remote attackers to determine valid usernames on the server.","status":"published","published":"2022-04-30T18:17:10Z","modified":"2023-01-30T05:05:09Z","updated_at":"2026-11-02T14:47:12.491869Z"}],"nvd":[{"id":"CVE-2001-1013","description":"Apache on Red Hat Linux with with the UserDir directive enabled generates different error codes when a username exists and there is no public_html directory and when the username does not exist, which could allow remote attackers to determine valid usernames on the server.","status":"published","published":"2001-09-12T04:00:00Z","modified":"2026-06-16T21:55:24.74Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:00:40.572315Z"}]}}