OpenBSD ISAKMP daemon Invalid SPI could allow an attacker to delete IPsec SAs

openbsd-isakmp-invalidspi-delete-sa (14117) 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 specified by the SPI (Security Parameters Index) and associated IPsec SAs, upon receipt of an invalid security parameter index error (Invalid SPI). 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


Apply the appropriate patch for your system. See References.


Platforms Affected:

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


Dec 31, 2003

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