{"id":"CVE-2005-0068","aliases":["EUVD-2005-0069","GHSA-rhmh-v4vm-7q2m"],"status":"published","title":"The original design of ICMP does not require authentication for host-generated ICMP error...","description":"The original design of ICMP does not require authentication for host-generated ICMP error messages, which makes it easier for attackers to forge ICMP error messages for specific TCP connections and cause a denial of service, as demonstrated using (1) blind connection-reset attacks with forged \"Destination Unreachable\" messages, (2) blind throughput-reduction attacks with forged \"Source Quench\" messages, or (3) blind throughput-reduction attacks with forged ICMP messages that cause the Path MTU to be reduced.  NOTE: CVE-2004-0790, CVE-2004-0791, and CVE-2004-1060 have been SPLIT based on different attacks; CVE-2005-0065, CVE-2005-0066, CVE-2005-0067, and CVE-2005-0068 are related identifiers that are SPLIT based on the underlying vulnerability.  While CVE normally SPLITs based on vulnerability, the attack-based identifiers exist due to the variety and number of affected implementations and solutions that address the attacks instead of the underlying vulnerabilities.","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":0.54387,"percentile":0.99018,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2004-12-22T05:00:00Z","modified":"2026-06-16T22:10:26Z","products":[{"vendor":"tcp","product":"tcp"}],"references":[{"url":"http://www.securityfocus.com/bid/13124","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://www.gont.com.ar/drafts/icmp-attacks-against-tcp.html","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2005-0068"},{"url":"https://github.com/advisories/GHSA-rhmh-v4vm-7q2m"}],"sources":{"cve":[{"id":"CVE-2005-0068","description":"The original design of ICMP does not require authentication for host-generated ICMP error messages, which makes it easier for attackers to forge ICMP error messages for specific TCP connections and cause a denial of service, as demonstrated using (1) blind connection-reset attacks with forged \"Destination Unreachable\" messages, (2) blind throughput-reduction attacks with forged \"Source Quench\" messages, or (3) blind throughput-reduction attacks with forged ICMP messages that cause the Path MTU to be reduced.  NOTE: CVE-2004-0790, CVE-2004-0791, and CVE-2004-1060 have been SPLIT based on different attacks; CVE-2005-0065, CVE-2005-0066, CVE-2005-0067, and CVE-2005-0068 are related identifiers that are SPLIT based on the underlying vulnerability.  While CVE normally SPLITs based on vulnerability, the attack-based identifiers exist due to the variety and number of affected implementations and solutions that address the attacks instead of the underlying vulnerabilities.","status":"published","published":"2005-01-19T05:00:00Z","modified":"2024-08-07T20:57:41.185Z","updated_at":"2026-11-02T14:33:40.578358Z"}],"euvd":[{"id":"EUVD-2005-0069","description":"The original design of ICMP does not require authentication for host-generated ICMP error messages, which makes it easier for attackers to forge ICMP error messages for specific TCP connections and cause a denial of service, as demonstrated using (1) blind connection-reset attacks with forged \"Destination Unreachable\" messages, (2) blind throughput-reduction attacks with forged \"Source Quench\" messages, or (3) blind throughput-reduction attacks with forged ICMP messages that cause the Path MTU to be reduced.  NOTE: CVE-2004-0790, CVE-2004-0791, and CVE-2004-1060 have been SPLIT based on different attacks; CVE-2005-0065, CVE-2005-0066, CVE-2005-0067, and CVE-2005-0068 are related identifiers that are SPLIT based on the underlying vulnerability.  While CVE normally SPLITs based on vulnerability, the attack-based identifiers exist due to the variety and number of affected implementations and solutions that address the attacks instead of the underlying vulnerabilities.","status":"published","published":"2005-01-19T05:00:00Z","modified":"2024-08-07T20:57:41Z","updated_at":"2026-11-03T01:15:39.756514Z"}],"ghsa":[{"id":"GHSA-rhmh-v4vm-7q2m","title":"The original design of ICMP does not require authentication for host-generated ICMP error...","description":"The original design of ICMP does not require authentication for host-generated ICMP error messages, which makes it easier for attackers to forge ICMP error messages for specific TCP connections and cause a denial of service, as demonstrated using (1) blind connection-reset attacks with forged \"Destination Unreachable\" messages, (2) blind throughput-reduction attacks with forged \"Source Quench\" messages, or (3) blind throughput-reduction attacks with forged ICMP messages that cause the Path MTU to be reduced.  NOTE: CVE-2004-0790, CVE-2004-0791, and CVE-2004-1060 have been SPLIT based on different attacks; CVE-2005-0065, CVE-2005-0066, CVE-2005-0067, and CVE-2005-0068 are related identifiers that are SPLIT based on the underlying vulnerability.  While CVE normally SPLITs based on vulnerability, the attack-based identifiers exist due to the variety and number of affected implementations and solutions that address the attacks instead of the underlying vulnerabilities.","status":"published","published":"2022-05-01T01:46:58Z","modified":"2023-01-30T05:06:50Z","updated_at":"2026-11-02T14:47:34.433705Z"}],"nvd":[{"id":"CVE-2005-0068","description":"The original design of ICMP does not require authentication for host-generated ICMP error messages, which makes it easier for attackers to forge ICMP error messages for specific TCP connections and cause a denial of service, as demonstrated using (1) blind connection-reset attacks with forged \"Destination Unreachable\" messages, (2) blind throughput-reduction attacks with forged \"Source Quench\" messages, or (3) blind throughput-reduction attacks with forged ICMP messages that cause the Path MTU to be reduced.  NOTE: CVE-2004-0790, CVE-2004-0791, and CVE-2004-1060 have been SPLIT based on different attacks; CVE-2005-0065, CVE-2005-0066, CVE-2005-0067, and CVE-2005-0068 are related identifiers that are SPLIT based on the underlying vulnerability.  While CVE normally SPLITs based on vulnerability, the attack-based identifiers exist due to the variety and number of affected implementations and solutions that address the attacks instead of the underlying vulnerabilities.","status":"published","published":"2004-12-22T05:00:00Z","modified":"2026-06-16T22:10:26.747Z","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":"2026-11-02T14:00:54.594271Z"}]}}