{"id":"CVE-2003-0567","aliases":["EUVD-2003-0561","GHSA-c4c9-f467-hxxv"],"status":"published","title":"Cisco IOS 11.x and 12.0 through 12.2 allows remote attackers to cause a denial of service ...","description":"Cisco IOS 11.x and 12.0 through 12.2 allows remote attackers to cause a denial of service (traffic block) by sending a particular sequence of IPv4 packets to an interface on the device, causing the input queue on that interface to be marked as full.","severity":{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.16576,"percentile":0.9703,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-20"],"published":"2003-07-25T04:00:00Z","modified":"2026-06-16T22:02:26Z","exploits":[{"source":"exploitdb","id":"EDB-59","title":"Cisco IOS - IPv4 Packets Denial of Service","type":"dos","platform":"hardware","date":"2003-07-18","verified":true,"url":"https://www.exploit-db.com/exploits/59"},{"source":"exploitdb","id":"EDB-60","title":"Cisco IOS - 'cisco-bug-44020.c' IPv4 Packet Denial of Service","type":"dos","platform":"hardware","date":"2003-07-21","verified":true,"url":"https://www.exploit-db.com/exploits/60"},{"source":"exploitdb","id":"EDB-62","title":"Cisco IOS - using hping Remote Denial of Service","type":"dos","platform":"hardware","date":"2003-07-22","verified":true,"url":"https://www.exploit-db.com/exploits/62"}],"products":[{"vendor":"cisco","product":"ios"},{"vendor":"cisco","product":"ons_15454_optical_transport_platform"},{"vendor":"cisco","product":"optical_networking_systems_software"}],"references":[{"url":"http://www.kb.cert.org/vuls/id/411332","tags":["third-party-advisory","x_refsource_CERT-VN","x_transferred","US Government Resource"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5603","tags":["vdb-entry","signature","x_refsource_OVAL","x_transferred"]},{"url":"http://www.cert.org/advisories/CA-2003-17.html","tags":["third-party-advisory","x_refsource_CERT","x_transferred","Exploit","Patch","Third Party Advisory","US Government Resource"]},{"url":"http://www.cisco.com/warp/public/707/cisco-sa-20030717-blocked.shtml","tags":["vendor-advisory","x_refsource_CISCO","x_transferred"]},{"url":"http://www.cert.org/advisories/CA-2003-15.html","tags":["third-party-advisory","x_refsource_CERT","x_transferred","Patch","Third Party Advisory","US Government Resource"]},{"url":"http://lists.grok.org.uk/pipermail/full-disclosure/2003-July/006743.html","tags":["mailing-list","x_refsource_FULLDISC","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2003-0567"},{"url":"https://github.com/advisories/GHSA-c4c9-f467-hxxv"}],"sources":{"cve":[{"id":"CVE-2003-0567","description":"Cisco IOS 11.x and 12.0 through 12.2 allows remote attackers to cause a denial of service (traffic block) by sending a particular sequence of IPv4 packets to an interface on the device, causing the input queue on that interface to be marked as full.","status":"published","published":"2003-07-25T04:00:00Z","modified":"2024-08-08T01:58:11.019Z","updated_at":"2026-11-02T14:20:16.757505Z"}],"euvd":[{"id":"EUVD-2003-0561","description":"Cisco IOS 11.x and 12.0 through 12.2 allows remote attackers to cause a denial of service (traffic block) by sending a particular sequence of IPv4 packets to an interface on the device, causing the input queue on that interface to be marked as full.","status":"published","published":"2003-07-25T04:00:00Z","modified":"2024-08-08T01:58:11Z","updated_at":"2026-11-03T01:15:06.866577Z"}],"ghsa":[{"id":"GHSA-c4c9-f467-hxxv","title":"Cisco IOS 11.x and 12.0 through 12.2 allows remote attackers to cause a denial of service ...","description":"Cisco IOS 11.x and 12.0 through 12.2 allows remote attackers to cause a denial of service (traffic block) by sending a particular sequence of IPv4 packets to an interface on the device, causing the input queue on that interface to be marked as full.","status":"published","published":"2022-04-29T01:26:39Z","modified":"2023-01-30T05:01:25Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:46:24.524248Z"}],"nvd":[{"id":"CVE-2003-0567","description":"Cisco IOS 11.x and 12.0 through 12.2 allows remote attackers to cause a denial of service (traffic block) by sending a particular sequence of IPv4 packets to an interface on the device, causing the input queue on that interface to be marked as full.","status":"published","published":"2003-08-18T04:00:00Z","modified":"2026-06-16T22:02:26.847Z","cvss":[{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:00:46.710758Z"}]}}