Portmaster Predictable TCP Initial Sequence Number Vulnerability

BID:107

Info

Portmaster Predictable TCP Initial Sequence Number Vulnerability

Bugtraq ID: 107
Class: Unknown
CVE:
Remote: Yes
Local: Unknown
Published: Jun 30 1998 12:00AM
Updated: Jun 30 1998 12:00AM
Credit: The Portmaster vulnerability was reported by Emmanuel Tycho <[email protected]> to the BugTraq mailing list on Tue, 30 Jun 1998.
Vulnerable: Lucent ComOS 3.7
Not Vulnerable:

Discussion

Portmaster Predictable TCP Initial Sequence Number Vulnerability

Lucent Portmaster's always have a TCP initial sequence number of 127. This allows remote attackers to launch TCP sequence prediction attacks against them trivially. This can in some instances allow for abuses of trust via spoofing attacks.

Exploit / POC

Portmaster Predictable TCP Initial Sequence Number Vulnerability

Currently the SecurityFocus staff are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected].

Solution / Fix

Portmaster Predictable TCP Initial Sequence Number Vulnerability

Solution:
Currently the SecurityFocus staff are not aware of any vendor supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected].

References

Portmaster Predictable TCP Initial Sequence Number Vulnerability

References:

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