{"id":"CVE-2000-0453","aliases":["EUVD-2000-0452","GHSA-3vr3-fvrq-86x3"],"status":"published","title":"XFree86 3.3.x and 4.0 allows a user to cause a denial of service via a negative counter value in...","description":"XFree86 3.3.x and 4.0 allows a user to cause a denial of service via a negative counter value in a malformed TCP packet that is sent to port 6000.","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":0.02964,"percentile":0.87302,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"published":"2000-05-18T04:00:00Z","modified":"2026-06-16T21:51:46Z","exploits":[{"source":"exploitdb","id":"EDB-19950","title":"XFree86 X11R6 3.3.5/3.3.6/4.0 Xserver - Denial of Service","type":"dos","platform":"linux","date":"2000-05-18","verified":true,"url":"https://www.exploit-db.com/exploits/19950"}],"products":[{"vendor":"xfree86_project","product":"x11r6"}],"references":[{"url":"http://archives.neohapsis.com/archives/bugtraq/2000-05/0223.html","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"http://www.securityfocus.com/bid/1235","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"ftp://ftp.caldera.com/pub/security/OpenLinux/CSSA-2000-012.0.txt","tags":["vendor-advisory","x_refsource_CALDERA","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2000-0453"},{"url":"https://github.com/advisories/GHSA-3vr3-fvrq-86x3"}],"sources":{"cve":[{"id":"CVE-2000-0453","description":"XFree86 3.3.x and 4.0 allows a user to cause a denial of service via a negative counter value in a malformed TCP packet that is sent to port 6000.","status":"published","published":"2000-07-12T04:00:00Z","modified":"2024-08-08T05:21:29.681Z","updated_at":"2026-11-02T14:33:41.23606Z"}],"euvd":[{"id":"EUVD-2000-0452","description":"XFree86 3.3.x and 4.0 allows a user to cause a denial of service via a negative counter value in a malformed TCP packet that is sent to port 6000.","status":"published","published":"2000-07-12T04:00:00Z","modified":"2024-08-08T05:21:29Z","updated_at":"2026-11-03T00:56:25.069165Z"}],"ghsa":[{"id":"GHSA-3vr3-fvrq-86x3","title":"XFree86 3.3.x and 4.0 allows a user to cause a denial of service via a negative counter value in...","description":"XFree86 3.3.x and 4.0 allows a user to cause a denial of service via a negative counter value in a malformed TCP packet that is sent to port 6000.","status":"published","published":"2022-05-03T03:06:41Z","modified":"2023-02-01T05:00:58Z","updated_at":"2026-11-02T14:49:38.236988Z"}],"nvd":[{"id":"CVE-2000-0453","description":"XFree86 3.3.x and 4.0 allows a user to cause a denial of service via a negative counter value in a malformed TCP packet that is sent to port 6000.","status":"published","published":"2000-05-18T04:00:00Z","modified":"2026-06-16T21:51:46.02Z","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":"2026-11-02T13:58:51.654586Z"}]}}