{"id":"CVE-2001-1556","aliases":["EUVD-2001-1533","GHSA-9f54-6r7j-3hph"],"status":"published","title":"The log files in Apache web server contain information directly supplied by clients and does not...","description":"The log files in Apache web server contain information directly supplied by clients and does not filter or quote control characters, which could allow remote attackers to hide HTTP requests and spoof source IP addresses when logs are viewed with UNIX programs such as cat, tail, and grep.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03564,"percentile":0.89426,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-532"],"published":"2001-12-31T05:00:00Z","modified":"2026-06-16T21:56:30Z","products":[{"vendor":"apache","product":"http_server"}],"references":[{"url":"http://www.iss.net/security_center/static/7363.php","tags":["vdb-entry","x_refsource_XF","x_transferred","Broken Link"]},{"url":"http://httpd.apache.org/docs/logs.html","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"http://archives.neohapsis.com/archives/bugtraq/2001-10/0231.html","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred","Broken Link"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2001-1556"},{"url":"https://github.com/advisories/GHSA-9f54-6r7j-3hph"}],"sources":{"cve":[{"id":"CVE-2001-1556","description":"The log files in Apache web server contain information directly supplied by clients and does not filter or quote control characters, which could allow remote attackers to hide HTTP requests and spoof source IP addresses when logs are viewed with UNIX programs such as cat, tail, and grep.","status":"published","published":"2005-07-14T04:00:00Z","modified":"2024-09-16T17:54:21.123Z","updated_at":"2026-11-02T14:34:42.680977Z"}],"euvd":[{"id":"EUVD-2001-1533","description":"The log files in Apache web server contain information directly supplied by clients and does not filter or quote control characters, which could allow remote attackers to hide HTTP requests and spoof source IP addresses when logs are viewed with UNIX programs such as cat, tail, and grep.","status":"published","published":"2005-07-14T04:00:00Z","modified":"2024-09-16T17:54:21Z","updated_at":"2026-11-03T00:55:37.743963Z"}],"ghsa":[{"id":"GHSA-9f54-6r7j-3hph","title":"The log files in Apache web server contain information directly supplied by clients and does not...","description":"The log files in Apache web server contain information directly supplied by clients and does not filter or quote control characters, which could allow remote attackers to hide HTTP requests and spoof source IP addresses when logs are viewed with UNIX programs such as cat, tail, and grep.","status":"published","published":"2022-04-30T18:18:18Z","modified":"2023-01-30T05:05:23Z","cwes":["CWE-532"],"updated_at":"2026-11-02T14:47:15.872717Z"}],"nvd":[{"id":"CVE-2001-1556","description":"The log files in Apache web server contain information directly supplied by clients and does not filter or quote control characters, which could allow remote attackers to hide HTTP requests and spoof source IP addresses when logs are viewed with UNIX programs such as cat, tail, and grep.","status":"published","published":"2001-12-31T05:00:00Z","modified":"2026-06-16T21:56:30.05Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-532"],"updated_at":"2026-11-02T14:00:41.313877Z"}]}}