What’s Vulnerable › Vulnerabilities

CVE-2002-0381

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2002-06-25 · updated 2026-06-16

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.

Affected products

• FreeBSD: through 4.5
• Netbsd: 2.0.4
• OpenBSD: all versions

References

• http://cvsweb.netbsd.org/bsdweb.cgi/syssrc/sys/netinet/tcp_input.c.diff?r1=1.136&r2=1.137
• http://online.securityfocus.com/archive/1/262733
• http://www.FreeBSD.org/cgi/query-pr.cgi?pr=35022
• 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.osvdb.org/5308
• 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://online.securityfocus.com/archive/1/262733
• http://www.FreeBSD.org/cgi/query-pr.cgi?pr=35022

Get alerted when CVE-2002-0381 or the next vulnerability affects your stack