Test case 11010
ICMP netmask request, corresponding to CVE-1999-0524.
Vulnerability summary
ICMP information such as (1) netmask and (2) timestamp is allowed from arbitrary hosts.
What this test case checks
This test case probes a host for ICMP type 17 (Address Mask Request) responses. A response leaks the subnet mask of the responding interface, which assists attackers in mapping the local network topology. Most modern systems do not respond to type 17 by default.