{"id":"CVE-2001-0328","aliases":["BELL-CVE-2001-0328","EUVD-2001-0328","GHSA-jvrp-wcjq-4xx5"],"status":"published","title":"TCP implementations that use random increments for initial sequence numbers (ISN) can allow...","description":"TCP implementations that use random increments for initial sequence numbers (ISN) can allow remote attackers to perform session hijacking or disruption by injecting a flood of packets with a range of ISN values, one of which may match the expected ISN.","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":"2026-11-08","score":0.18125,"percentile":0.97219,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"published":"2001-05-24T04:00:00Z","modified":"2026-06-16T21:54:06Z","exploits":[{"source":"exploitdb","id":"EDB-19522","title":"Linux Kernel 2.2 - Predictable TCP Initial Sequence Number","type":"remote","platform":"linux","date":"1999-09-27","verified":true,"url":"https://www.exploit-db.com/exploits/19522"}],"references":[{"url":"http://secunia.com/advisories/8044","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"]},{"url":"http://www.securitytracker.com/id/1033181","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A4922","tags":["vdb-entry","signature","x_refsource_OVAL","x_transferred"]},{"url":"http://www.securityfocus.com/bid/2682","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://www.cert.org/advisories/CA-2001-09.html","tags":["third-party-advisory","x_refsource_CERT","x_transferred","Patch","Third Party Advisory","US Government Resource"]},{"url":"ftp://patches.sgi.com/support/free/security/advisories/20030201-01-P","tags":["vendor-advisory","x_refsource_SGI","x_transferred"]},{"url":"http://securityreason.com/securityalert/57","tags":["third-party-advisory","x_refsource_SREASON","x_transferred"]},{"url":"https://support.f5.com/csp/article/K19063943?utm_source=f5support\u0026amp%3Butm_medium=RSS","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2001-0328"},{"url":"https://support.f5.com/csp/article/K19063943?utm_source=f5support\u0026amp;utm_medium=RSS"},{"url":"https://github.com/advisories/GHSA-jvrp-wcjq-4xx5"},{"url":"https://docs.bell-sw.com/security/cves/CVE-2001-0328","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2001-0328","description":"TCP implementations that use random increments for initial sequence numbers (ISN) can allow remote attackers to perform session hijacking or disruption by injecting a flood of packets with a range of ISN values, one of which may match the expected ISN.","status":"published","published":"2001-05-24T04:00:00Z","modified":"2024-08-08T04:14:07.389Z","updated_at":"2026-11-02T14:34:43.358691Z"}],"euvd":[{"id":"EUVD-2001-0328","description":"TCP implementations that use random increments for initial sequence numbers (ISN) can allow remote attackers to perform session hijacking or disruption by injecting a flood of packets with a range of ISN values, one of which may match the expected ISN.","status":"published","published":"2001-05-24T04:00:00Z","modified":"2024-08-08T04:14:07Z","updated_at":"2026-11-03T01:14:52.069936Z"}],"ghsa":[{"id":"GHSA-jvrp-wcjq-4xx5","title":"TCP implementations that use random increments for initial sequence numbers (ISN) can allow...","description":"TCP implementations that use random increments for initial sequence numbers (ISN) can allow remote attackers to perform session hijacking or disruption by injecting a flood of packets with a range of ISN values, one of which may match the expected ISN.","status":"published","published":"2022-05-03T03:07:08Z","modified":"2023-02-01T05:00:59Z","updated_at":"2026-11-02T14:49:38.712812Z"}],"nvd":[{"id":"CVE-2001-0328","description":"TCP implementations that use random increments for initial sequence numbers (ISN) can allow remote attackers to perform session hijacking or disruption by injecting a flood of packets with a range of ISN values, one of which may match the expected ISN.","status":"published","published":"2001-06-27T04:00:00Z","modified":"2026-06-16T21:54:06.47Z","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":"2026-11-02T14:00:40.041412Z"}],"osv":[{"id":"BELL-CVE-2001-0328","title":"CVE-2001-0328 does not affect BellSoft software","status":"withdrawn","published":"2001-06-27T04:00:00Z","modified":"2026-01-28T07:15:39.090195Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium"}],"updated_at":"2026-11-02T15:28:12.886815Z"}]}}