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IPsec-Tools: Denial of Service


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200705-09 / ipsec-tools
Release Date May 08, 2007
Latest Revision May 08, 2007: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-firewall/ipsec-tools < 0.6.7 >= 0.6.7 All supported architectures

Related bugreports: #173219


IPsec-Tools contains a vulnerability that allows a remote attacker to crash the IPsec tunnel.

2.  Impact Information


IPsec-Tools is a port of KAME's implementation of the IPsec utilities. It contains a collection of network monitoring tools, including racoon, ping, and ping6.


The isakmp_info_recv() function in src/racoon/isakmp_inf.c does not always check that DELETE (ISAKMP_NPTYPE_D) and NOTIFY (ISAKMP_NPTYPE_N) packets are encrypted.


A remote attacker could send a specially crafted IPsec message to one of the two peers during the beginning of phase 1, resulting in the termination of the IPsec exchange.

3.  Resolution Information


There is no known workaround at this time.


All IPsec-Tools users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-firewall/ipsec-tools-0.6.7"

4.  References


Page updated May 08, 2007

Summary: This is a Gentoo Linux Security Advisory

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