[ GLSA 200705-09 ] IPsec-Tools: Denial of Service

[GLSA]

Gentoo Linux Security Advisory

Title: IPsec-Tools: Denial of Service (GLSA 200705-09)
Severity: normal
Exploitable: remote
Date: May 08, 2007
Bug(s): #173219
ID: 200705-09

Synopsis


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


Background


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.


Affected Packages

Package: net-firewall/ipsec-tools
Vulnerable: < 0.6.7
Unaffected: >= 0.6.7
Architectures: All supported architectures


Description


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.


Impact


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.


Workaround


There is no known workaround at this time.


Resolution


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