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Vulnerability Score 5.0 5.0
CVE Id CVE-2003-0187
Last Modified 10 Sep 2008 03:18:10
Published 27 Aug 2003 12:00:00
Confidentiality Impact NONE NONE
Integrity Impact NONE NONE
Availability Impact PARTIAL PARTIAL
Access Vector NETWORK
Access Complexity LOW
Authentication NONE



The connection tracking core of Netfilter for Linux 2.4.20, with CONFIG_IP_NF_CONNTRACK enabled or the ip_conntrack module loaded, allows remote attackers to cause a denial of service (resource consumption) due to an inconsistency with Linux 2.4.20's support of linked lists, which causes Netfilter to fail to identify connections with an UNCONFIRMED status and use large timeouts.

Vulnerable Systems

Operating System

  • Linux Kernel 2.4.20


BUGTRAQ - 20030802 [SECURITY] Netfilter Security Advisory: Conntrack list_del() DoS

Last Updated: 27 May 2016 10:37:48