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Vulnerability Score 7.5 7.5
CVE Id CVE-1999-1150
Last Modified 05 Sep 2008 04:18:50
Published 30 Jun 1998 12:00:00
Confidentiality Impact PARTIAL PARTIAL
Integrity Impact PARTIAL PARTIAL
Availability Impact PARTIAL PARTIAL
Access Vector NETWORK
Access Complexity LOW
Authentication NONE



Livingston Portmaster routers running ComOS use the same initial sequence number (ISN) for TCP connections, which allows remote attackers to conduct spoofing and hijack TCP sessions.

Vulnerable Systems


XF - portmaster-fixed-isn(1882)

BUGTRAQ - 19980630 Livingston Portmaster - ISN generation is loosy!

Last Updated: 27 May 2016 10:35:18