{"id":"CVE-2000-0549","aliases":["EUVD-2000-0546","GHSA-5pwv-v67v-mf36"],"status":"published","title":"Kerberos 4 KDC program does not properly check for null termination of AUTH_MSG_KDC_REQUEST...","description":"Kerberos 4 KDC program does not properly check for null termination of AUTH_MSG_KDC_REQUEST requests, which allows remote attackers to cause a denial of service via a malformed request.","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":0.02284,"percentile":0.83263,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2000-06-09T04:00:00Z","modified":"2026-06-16T21:51:58Z","products":[{"vendor":"cygnus","product":"cygnus_network_security"},{"vendor":"cygnus","product":"kerbnet"},{"vendor":"mit","product":"kerberos"},{"vendor":"mit","product":"kerberos_5"}],"references":[{"url":"http://www.cert.org/advisories/CA-2000-11.html","tags":["third-party-advisory","x_refsource_CERT","x_transferred","Patch","Third Party Advisory","US Government Resource"]},{"url":"http://ciac.llnl.gov/ciac/bulletins/k-051.shtml","tags":["third-party-advisory","government-resource","x_refsource_CIAC","x_transferred"]},{"url":"http://archives.neohapsis.com/archives/bugtraq/2000-06/0064.html","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred","Exploit","Patch","Vendor Advisory"]},{"url":"http://web.mit.edu/kerberos/www/advisories/krb4kdc.txt","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://www.redhat.com/support/errata/RHSA-2000-031.html","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2000-0549"},{"url":"https://github.com/advisories/GHSA-5pwv-v67v-mf36"}],"sources":{"cve":[{"id":"CVE-2000-0549","description":"Kerberos 4 KDC program does not properly check for null termination of AUTH_MSG_KDC_REQUEST requests, which allows remote attackers to cause a denial of service via a malformed request.","status":"published","published":"2000-10-13T04:00:00Z","modified":"2024-08-08T05:21:31.092Z","updated_at":"2026-11-02T14:33:41.23606Z"}],"euvd":[{"id":"EUVD-2000-0546","description":"Kerberos 4 KDC program does not properly check for null termination of AUTH_MSG_KDC_REQUEST requests, which allows remote attackers to cause a denial of service via a malformed request.","status":"published","published":"2000-10-13T04:00:00Z","modified":"2024-08-08T05:21:31Z","updated_at":"2026-11-03T00:56:24.66443Z"}],"ghsa":[{"id":"GHSA-5pwv-v67v-mf36","title":"Kerberos 4 KDC program does not properly check for null termination of AUTH_MSG_KDC_REQUEST...","description":"Kerberos 4 KDC program does not properly check for null termination of AUTH_MSG_KDC_REQUEST requests, which allows remote attackers to cause a denial of service via a malformed request.","status":"published","published":"2022-04-30T18:13:50Z","modified":"2023-01-30T05:04:35Z","updated_at":"2026-11-02T14:47:05.039925Z"}],"nvd":[{"id":"CVE-2000-0549","description":"Kerberos 4 KDC program does not properly check for null termination of AUTH_MSG_KDC_REQUEST requests, which allows remote attackers to cause a denial of service via a malformed request.","status":"published","published":"2000-06-09T04:00:00Z","modified":"2026-06-16T21:51:58.56Z","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":"2026-11-02T13:59:02.365657Z"}]}}