Predictable TCP Initial Sequence Numbers (ISNs) in Cisco IOS 12.1 and earlier: A Remote Hijacking Vulnerability

CVE-2001-0288 · HIGH Severity

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

Cisco switches and routers running IOS 12.1 and earlier produce predictable TCP Initial Sequence Numbers (ISNs), which allows remote attackers to spoof or hijack TCP connections.

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