[ GLSA 200404-17 ] ipsec-tools and iputils contain a remote DoS vulnerability

[GLSA]

Gentoo Linux Security Advisory

Title: ipsec-tools and iputils contain a remote DoS vulnerability (GLSA 200404-17)
Severity: normal
Exploitable: remote
Date: April 24, 2004
Bug(s): #48847
ID: 200404-17

Synopsis


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.


Background


From http://ipsec-tools.sourceforge.n
et/
"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: net-firewall/ipsec-tools
Vulnerable: < 0.3.1
Unaffected: >= 0.3.1
Architectures: amd64

Package: net-misc/iputils
Vulnerable: = 021109-r1
Unaffected: = 021109-r3
Architectures: ppc amd64 ppc64 s390


Description


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.


Impact


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


Workaround


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


Resolution


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