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CVE-2000-0916

HighPublished

FreeBSD 4.1.1 and earlier, and possibly other BSD-based OSes, uses an insufficient random number generator to generate initial TCP sequence numbers (ISN),...

Published: Nov 29, 2000
Updated: Aug 8, 2024
Assigning CNA: mitre
Evidence observed: Sep 27, 1999

Primary CVSS

7.5/ 10High

nvd · CVSS 2.0

AV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS probability estimate

5.5%

Low · next 30 days

Percentile: 92.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

FreeBSD 4.1.1 and earlier, and possibly other BSD-based OSes, uses an insufficient random number generator to generate initial TCP sequence numbers (ISN), which allows remote attackers to spoof TCP connections.

Sources

Linux Kernel 2.2 - Predictable TCP Initial Sequence NumberExploit
Stealth & S. Krahmer · linux · Sep 27, 1999

Responsible use

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