HOMEVULNERABILITIESCVE-2006-1646
MEDIUM

CVE-2006-1646

NVD-CWE-OtherPublished: April 6, 2006· Updated: Jun 16, 2026

5.0
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2006-1646 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityNone
AvailabilityP
AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected Vendors & Products

internet_key_exchange1 product(s)
internet key exchange
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://secunia.com/advisories/19463
ADVISORYhttp://secunia.com/advisories/19463

All References (10)

→
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/19463Vendor Advisory
→
http://www.ee.oulu.fi/research/ouspg/protos/testing/c09/isakmp/
→
http://www.niscc.gov.uk/niscc/docs/re-20051114-01014.pdf?lang=en
→
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/19463Vendor Advisory
→
http://www.ee.oulu.fi/research/ouspg/protos/testing/c09/isakmp/
→
http://www.niscc.gov.uk/niscc/docs/re-20051114-01014.pdf?lang=en

Quick Facts

CVE IDCVE-2006-1646
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessNVD-CWE-Other
CISA KEVNo
Affected1 vendor(s)
PublishedApr 6, 2006

Related CVEs (NVD-CWE-Other)

CVE-2007-2638
10.0
CVE-2007-2712
10.0
CVE-2007-0748
10.0
CVE-2007-0749
10.0
CVE-2007-2633
10.0
CVE-2007-2713
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2006-1646 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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