CVE-1999-0305: Bsdi Bsd OS

Medium severity, CVSS 5.0. EPSS: 1.4% chance of exploitation in the next 30 days.

The system configuration control (sysctl) facility in BSD based operating systems OpenBSD 2.2 and earlier, and FreeBSD 2.2.5 and earlier, does not properly restrict source routed packets even when the (1) dosourceroute or (2) forwarding variables are set, which allows remote attackers to spoof TCP connections.

Affected products

• Bsdi Bsd OS: any version
• Freebsd Freebsd: version 2.2 only; version 2.2.5 only
• OpenBSD OpenBSD: version 2.0 only; version 2.1 only; version 2.2 only

Published 1998-02-01. Last modified 2026-06-16.