Unrated severityNVD Advisory· Published Aug 29, 2006· Updated Jun 16, 2026

CVE-2006-4436

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

OpenBSD/OpenBSD2 versions
cpe:2.3:o:openbsd:openbsd:3.8:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:openbsd:openbsd:3.8:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:3.9:*:*:*:*:*:*:*
OpenBSD/isakmpdllm-fuzzy
Range: <=3.9
osv-coords
pkg:deb/debian/isakmpd?arch=source
Range: < 20041012-4

Patches

Vulnerability mechanics

References

secunia.com/advisories/21652nvdPatchVendor Advisory
securitytracker.com/idnvdPatch
www.securityfocus.com/bid/19712nvdPatch
secunia.com/advisories/21905nvd
www.debian.org/security/2006/dsa-1175nvd
www.openbsd.org/errata.htmlnvd
www.openbsd.org/errata38.htmlnvd
www.osvdb.org/28194nvd
exchange.xforce.ibmcloud.com/vulnerabilities/28645nvd

News mentions

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