J-Security Center

Title: Portmaster Predictable TCP Initial Sequence Number Vulnerability

Severity: MODERATE

Description:

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.

Affected Products:

  • Lucent ComOS 3.7.0

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