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Gentoo Linux Advisory: ipsec-tools, iputils

Apr 25, 2004, 23:30 (0 Talkback[s])

Gentoo Linux Security Advisory GLSA 200404-17


Severity: Normal
Title: ipsec-tools and iputils contain a remote DoS vulnerability
Date: April 24, 2004
Bugs: #48847
ID: 200404-17


racoon, which is included in the ipsec-tools and iputils packages in Portage, does not check the length of ISAKMP headers. Attackers may be able to craft an ISAKMP header of sufficient length to consume all available system resoources, causing a Denial of Service.


From http://ipsec-tools.sourceforge.net/ :

"IPsec-Tools is a port of KAME's IPsec utilities to the Linux-2.6 IPsec implementation."

iputils is a collection of network monitoring tools, including racoon, ping and ping6.

Affected packages

Package Vulnerable Unaffected
net-firewall/ipsec-tools < 0.3.1 > 0.3.1
net-misc/iputils 021109-r1 021109-r3


When racoon receives an ISAKMP header, it allocates memory based on the length of the header field. Thus, an attacker may be able to cause a Denial of Services by creating a header that is large enough to consume all available system resources.


This vulnerability may allow an attacker to remotely cause a Denial of Service.


A workaround is not currently known for this issue. All users are advised to upgrade to the latest version of the affected package.


ipsec-tools users should upgrade to version 0.2.5 or later:

    # emerge sync
    # emerge -pv ">=3Dnet-firewall/ipsec-tools-0.3.1"
    # emerge ">=3Dnet-firewall/ipsec-tools-0.3.1"

iputils users should upgrade to version 021109-r3 or later:

    # emerge sync
    # emerge -pv ">=3Dnet-misc/iputils-021109-r3"
    # emerge ">=3Dnet-misc/iputils-021109-r3"


[ 1 ] http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCAN-2004-0403


This GLSA and any updates to it are available for viewing at the Gentoo Security Website:



Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.


Copyright 2004 Gentoo Technologies, Inc; referenced text belongs to its owner(s).

The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.