{"id":"CVE-2003-0866","aliases":["DEBIAN-CVE-2003-0866","DSA-395","EUVD-2022-1670","GHSA-7wj2-48c4-2684"],"status":"published","title":"Apache Tomcat Denial of Service vulnerability in the Catalina package","description":"The Catalina org.apache.catalina.connector.http package in Tomcat 4.0.x up to 4.0.3 allows remote attackers to cause a denial of service via several requests that do not follow the HTTP protocol, which causes Tomcat to reject later requests.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.34816,"percentile":0.98438,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-400"],"published":"2003-10-15T00:00:00Z","modified":"2026-06-16T22:03:06Z","exploits":[{"source":"exploitdb","id":"EDB-23245","title":"Apache Tomcat 4.0.x - Non-HTTP Request Denial of Service","type":"dos","platform":"linux","date":"2003-10-15","verified":true,"url":"https://www.exploit-db.com/exploits/23245"}],"fixes":[{"ecosystem":"Maven","package":"org.apache.tomcat:tomcat","fixed_in":["4.1.0"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:3.0","package":"tomcat4","fixed_in":["4.0.3-3woody3"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"org.apache.tomcat:tomcat","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0"},{"fixed":"4.1.0"}]}]},{"source":"osv","ecosystem":"Debian:3.0","package":"tomcat4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.3-3woody3"}]}]},{"source":"osv","ecosystem":"Maven","package":"org.apache.tomcat:tomcat","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0"},{"fixed":"4.1.0"}]}]}],"products":[{"vendor":"apache","product":"tomcat"}],"references":[{"url":"http://tomcat.apache.org/security-4.html","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://secunia.com/advisories/30908","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","web"]},{"url":"http://www.securityfocus.com/bid/8824","tags":["vdb-entry","x_refsource_BID","x_transferred","Patch","Vendor Advisory","web"]},{"url":"http://sunsolve.sun.com/search/document.do?assetkey=1-26-239312-1","tags":["vendor-advisory","x_refsource_SUNALERT","x_transferred","web"]},{"url":"http://secunia.com/advisories/30899","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","web"]},{"url":"http://www.vupen.com/english/advisories/2008/1979/references","tags":["vdb-entry","x_refsource_VUPEN","x_transferred","web"]},{"url":"http://www.debian.org/security/2003/dsa-395","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Patch","Vendor Advisory","web"]},{"url":"http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=215506","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Patch","Vendor Advisory","web"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/13429","tags":["vdb-entry","x_refsource_XF","x_transferred","web"]},{"url":"https://lists.apache.org/thread.html/29dc6c2b625789e70a9c4756b5a327e6547273ff8bde7e0327af48c5%40%3Cdev.tomcat.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"https://lists.apache.org/thread.html/c62b0e3a7bf23342352a5810c640a94b6db69957c5c19db507004d74%40%3Cdev.tomcat.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"https://lists.apache.org/thread.html/rb71997f506c6cc8b530dd845c084995a9878098846c7b4eacfae8db3%40%3Cdev.tomcat.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2003-0866","tags":["advisory"]},{"url":"https://lists.apache.org/thread.html/29dc6c2b625789e70a9c4756b5a327e6547273ff8bde7e0327af48c5@%3Cdev.tomcat.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/c62b0e3a7bf23342352a5810c640a94b6db69957c5c19db507004d74@%3Cdev.tomcat.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/rb71997f506c6cc8b530dd845c084995a9878098846c7b4eacfae8db3@%3Cdev.tomcat.apache.org%3E","tags":["web"]},{"url":"https://github.com/advisories/GHSA-7wj2-48c4-2684"}],"sources":{"cve":[{"id":"CVE-2003-0866","description":"The Catalina org.apache.catalina.connector.http package in Tomcat 4.0.x up to 4.0.3 allows remote attackers to cause a denial of service via several requests that do not follow the HTTP protocol, which causes Tomcat to reject later requests.","status":"published","published":"2003-10-17T04:00:00Z","modified":"2024-08-08T02:05:12.637Z","updated_at":"2026-11-02T14:20:16.757505Z"}],"euvd":[{"id":"EUVD-2022-1670","description":"The Catalina org.apache.catalina.connector.http package in Tomcat 4.0.x up to 4.0.3 allows remote attackers to cause a denial of service via several requests that do not follow the HTTP protocol, which causes Tomcat to reject later requests.","status":"published","published":"2003-10-17T04:00:00Z","modified":"2024-08-08T02:05:12Z","updated_at":"2026-11-03T01:15:05.487655Z"}],"ghsa":[{"id":"GHSA-7wj2-48c4-2684","title":"Apache Tomcat Denial of Service vulnerability in the Catalina package","description":"The Catalina org.apache.catalina.connector.http package in Tomcat 4.0.x up to 4.0.6 allows remote attackers to cause a denial of service via several requests that do not follow the HTTP protocol, which causes Tomcat to reject later requests.","status":"published","published":"2022-04-29T01:27:08Z","modified":"2023-09-18T22:40:44Z","cwes":["CWE-400"],"updated_at":"2026-11-02T14:37:05.567008Z"}],"nvd":[{"id":"CVE-2003-0866","description":"The Catalina org.apache.catalina.connector.http package in Tomcat 4.0.x up to 4.0.3 allows remote attackers to cause a denial of service via several requests that do not follow the HTTP protocol, which causes Tomcat to reject later requests.","status":"published","published":"2003-11-17T05:00:00Z","modified":"2026-06-16T22:03:06.62Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:00:47.41445Z"}],"osv":[{"id":"DSA-395","title":"tomcat4 - incorrect input handling","status":"published","published":"2003-10-15T00:00:00Z","modified":"2026-03-09T01:22:40.445303Z","updated_at":"2026-11-02T15:46:16.523846Z"},{"id":"GHSA-7wj2-48c4-2684","title":"Apache Tomcat Denial of Service vulnerability in the Catalina package","description":"The Catalina org.apache.catalina.connector.http package in Tomcat 4.0.x up to 4.0.6 allows remote attackers to cause a denial of service via several requests that do not follow the HTTP protocol, which causes Tomcat to reject later requests.","status":"published","published":"2022-04-29T01:27:08Z","modified":"2023-11-08T03:56:45.369284Z","cwes":["CWE-400"],"updated_at":"2026-11-02T15:46:41.732368Z"}]}}