J-Security Center

Title: OpenBSD ISAKMPD Malformed IPSEC SA Payload Denial Of Service Vulnerability

Severity: HIGH

Description:

isakmpd is the IKE key management daemon provided with OpenBSD. isakmpd is used when negotiating security associations in authenticated or encrypted network traffic and is normally used to facilitate VPN.

OpenBSD is prone to a vulnerability that would allow an attacker to cause the isakmpd daemon to crash, denying service to legitimate users. This issue is due to a failure of the process to handle ISAKMP packets with malformed IPSEC SA payloads.

The problem presents itself when a malformed IPSEC SA payload is issued to the affected daemon. This will cause the daemon to attempt to dereference unallocated memory and crash, effectively denying service to legitimate users.

This issue was previously reported in OpenBSD isakmpd Multiple Unspecified Remote Denial Of Service Vulnerabilities (BID 9907). That BID will be retired.

Affected Products:

  • OpenBSD OpenBSD -current
  • OpenBSD OpenBSD 3.3
  • OpenBSD OpenBSD 3.4

References:

Juniper Networks provides this content via a wide variety of sources and production methods. If notified of errors or omissions in the content of this page, Juniper Networks, at its discretion, will modify or remove the page or leave the content as is, depending on various factors including but not limited to the reputation and authority of the party providing the notification. Please use the contact information displayed elsewhere on this page to report any errors or omissions regarding the content on this page.