• News
• Infocus
• Foundations
• Microsoft
• Unix
• IDS
• Incidents
• Virus
• Pen-Test
• Firewalls
• Columnists
• Mailing Lists
• Newsletters
• Bugtraq
• Focus on IDS
• Focus on Linux
• Focus on Microsoft
• Forensics
• Pen-test
• Security Basics
• Vuln Dev
• Vulnerabilities
• Jobs
• Job Opportunities
• Resumes
• Job Seekers
• Employers
• Tools
• RSS
• News
• Vulns
• Security Research

• info
• discussion
• exploit
• solution
• references

BSD TCP/IP Broadcast Connection Check Vulnerability

An error has been reported in the TCP/IP implementation of multiple BSD derived operating systems, including FreeBSD, NetBSD and possibly OpenBSD. Versions of SGI IRIX are also affected.

RFC 1122 specifies that a TCP implementation must silently discard an incoming SYN segment addressed to a multicast or broadcast address. The vulnerable BSD implementation will drop a packet based on the link layer address, but does not check the destination IP address.