The TCP implementation in various BSD operating systems (tcp_input.c) does...

Vulnerability Description

The TCP implementation in various BSD operating systems (tcp_input.c) does not properly block connections to broadcast addresses, which could allow remote attackers to bypass intended filters via packets with a unicast link layer address and an IP broadcast address.

References

• ftp://patches.sgi.com/support/free/security/advisories/20030604-01-I
• http://online.securityfocus.com/archive/1/262733
• http://www.securityfocus.com/bid/4309
• http://cvsweb.netbsd.org/bsdweb.cgi/syssrc/sys/netinet/tcp_input.c.diff?r1=1.136&r2=1.137
• http://www.iss.net/security_center/static/8485.php
• http://www.openbsd.org/cgi-bin/cvsweb/src/sys/netinet/tcp_input.c.diff?r1=1.109&r2=1.110
• http://www.FreeBSD.org/cgi/query-pr.cgi?pr=35022
• http://www.osvdb.org/5308