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V-216134

CAT III (Low)

The system must not respond to ICMP broadcast netmask requests.

Rule ID

SV-216134r959010_rule

STIG

Solaris 11 X86 Security Technical Implementation Guide

Version

V3R5

CCIs

CCI-000366

Discussion

By determining the netmasks of various computers in your network, an attacker can better map your subnet structure and infer trust relationships.

Check Content

Determine if the response to address mask broadcast is disabled.

# ipadm show-prop -p _respond_to_address_mask_broadcast -co current ip

If the output of this command is not "0", this is a finding.

Fix Text

The Network Management profile is required.

Disable responses to address mask broadcast.

# pfexec ipadm set-prop -p _respond_to_address_mask_broadcast=0 ip