CVE-2002-0514 Information

Description

PF in OpenBSD 3.0 with the return-rst rule sets the TTL to 128 in the RST packet which allows remote attackers to determine if a port is being filtered because the TTL is different than the default TTL.

Reference

http://www.iss.net/security_center/static/8738.php http://www.securityfocus.com/archive/1/265188 http://www.securityfocus.com/bid/4401