Title: SonicWALL SOHO Firewall Predictable TCP Initial Sequence Number Vulnerability
Severity: CRITICAL
Description:
A vulnerability exists in the SonicWALL SOHO Firewall TCP/IP stack implementation that could allow an attacker to easily predict its TCP initial sequence numbers.
According to the TCP protocol, a packet from a remote host with the correct sequence number is trusted to come from that host. By predicting a sequence number, several attacks could be performed; an attacker could disrupt or hijack existing connections, or spoof future connections.
Systems running insecure protocols which blindly trust a TCP connection which appears to come from a given IP address without requiring any other form of authentication are vulnerable to spoofing by a remote attacker, potentially yielding privileges or access on the system.
Affected Products:
- SonicWALL SOHO 4.0.0 .0
- SonicWALL SOHO 5.0.0 .0
- SonicWALL SOHO 5.1.5 .0
References:
- SonicWALL: Vendor Homepage
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