VULNERABILITY INTELLIGENCE

CVE-2006-4436

CVSS score5 MEDIUM
EPSS probability1.83%
CISA KEVNot currently listed
Published2006-08-29
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:P/I:N/A:N

Description

isakmpd in OpenBSD 3.8, 3.9, and possibly earlier versions, creates Security Associations (SA) with a replay window of size 0 when isakmpd acts as a responder during SA negotiation, which allows remote attackers to replay IPSec packets and bypass the replay protection.

Primary references