{"cve":"CVE-2006-1646","nvd":{"published":"2006-04-06T10:04:00.000","modified":"2026-06-16T22:23:21.860","status":"Modified","description":"The Internet Key Exchange version 1 (IKEv1) implementation (isakmp_agg.c) in the Shoichi Sakane KAME Project racoon, as used by NetBSD 1.6, 2.x before 20060119, certain FreeBSD releases, and possibly other distributions of BSD or Linux operating systems, when running in aggressive mode, allows remote attackers to cause a denial of service (daemon crash) via crafted IKE packets, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2006-003.txt.asc","http://mail-index.netbsd.org/source-changes/2006/01/19/0017.html","http://secunia.com/advisories/19463","http://www.ee.oulu.fi/research/ouspg/protos/testing/c09/isakmp/","http://www.niscc.gov.uk/niscc/docs/re-20051114-01014.pdf?lang=en"],"products":["internet_key_exchange:internet_key_exchange"],"source":"nvd","synced_at":"2026-10-19T19:42:01.759833969+00:00"},"epss":{"cve":"CVE-2006-1646","score":0.02407,"percentile":0.84083,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}