National Cyber-Alert System
Vulnerability Summary for CVE-1999-0523
Original release date:01/01/1999
Last revised:10/20/2005
Source:
US-CERT/NIST
Overview
ICMP echo (ping) is allowed from arbitrary hosts.
Impact
CVSS Severity (version 2.0):
Impact Subscore:
10.0
Exploitability Subscore:
10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service
- Official Statement from Red Hat (09/11/2007)
-
Red Hat Enterprise Linux by default does respond to ICMP echo requests, although it’s likely that in a production environment those would be filtered by some firewall on entry to your network. However you can happily block ICMP ping responses using iptables if you so wish, but note that there is no known vulnerability in allowing them.
For more details, please see:
http://kbase.redhat.com/faq/FAQ_43_4304.shtm
References to Advisories, Solutions, and Tools
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Vulnerable software and versions
