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Openswan: Denial of Service


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200909-05 / openswan
Release Date September 09, 2009
Latest Revision September 09, 2009: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-misc/openswan < 2.4.15 >= 2.4.15 All supported architectures

Related bugreports: #264346, #275233


Multiple vulnerabilities in the pluto IKE daemon of Openswan might allow remote attackers to cause a Denial of Service.

2.  Impact Information


Openswan is an implementation of IPsec for Linux.


Multiple vulnerabilities have been discovered in Openswan:

  • Gerd v. Egidy reported a NULL pointer dereference in the Dead Peer Detection of the pluto IKE daemon as included in Openswan (CVE-2009-0790).
  • The Orange Labs vulnerability research team discovered multiple vulnerabilities in the ASN.1 parser (CVE-2009-2185).


A remote attacker could exploit these vulnerabilities by sending specially crafted R_U_THERE or R_U_THERE_ACK packets, or a specially crafted X.509 certificate containing a malicious Relative Distinguished Name (RDN), UTCTIME string or GENERALIZEDTIME string to cause a Denial of Service of the pluto IKE daemon.

3.  Resolution Information


There is no known workaround at this time.


All Openswan users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/openswan-2.4.15"

4.  References


Page updated September 09, 2009

Summary: This is a Gentoo Linux Security Advisory

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