OpenBSD ISAKMP daemon INITIAL-CONTACT could allow an attacker to delete IPsec SAs

openbsd-isakmp-initialcontact-delete-sa (14118) The risk level is classified as MediumMedium Risk


The OpenBSD ISAKMP daemon (isakmpd) could allow a remote attacker to delete an arbitrary IPsec SA (Security Association). Isakmpd deletes the IPsec SA that is pointing to the source IP address of a ISAKMP message and associated IPsec SAs, upon receipt of an INITIAL-CONTACT status notification that is chained to a specific payload. A remote attacker could send a specially-crafted ISAKMP message from a specific IP address to delete arbitrary IPsec SAs.

Note: Racoon, which is a key management daemon that negotiates and configures a set of parameters of IPsec, is also affected by this vulnerability.


Gain Access


For NetBSD-current (dated prior to 2004-01-17) and 1.6 branch:
Upgrade to the appropriate fixed versions of NetBSD, as listed in NetBSD Security Advisory 2004-001. See References.


Platforms Affected:

  • KAME Project Racoon
  • NetBSD NetBSD 1.6
  • NetBSD NetBSD 1.6.1
  • OpenBSD OpenBSD
  • RedHat Enterprise Linux 3 WS
  • RedHat Enterprise Linux 3 ES
  • RedHat Enterprise Linux 3 AS


Dec 31, 2003

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