Synopsis
The remote host is affected by an information disclosure vulnerability.
Description
The remote host answers to an ICMP_MASKREQ query and responds with its netmask. An attacker can use this information to understand how your network is set up and how routing is done. This may help him to bypass your filters.
Solution
Reconfigure the remote host so that it does not answer to those requests. Set up filters that deny ICMP packets of type 17.
Plugin Details
File Name: icmp_mask_req.nasl
Supported Sensors: Nessus
Risk Information
CVSS Score Rationale: Manual analysis of the vulnerability
Vulnerability Information
Vulnerability Publication Date: 1/1/1995