HOMEVULNERABILITIESCVE-2005-3671
HIGH

CVE-2005-3671

NVD-CWE-OtherPublished: November 18, 2005· Updated: Jun 16, 2026

7.8
CVSS v3.1

Official Description

The Internet Key Exchange version 1 (IKEv1) implementation in Openswan 2 (openswan-2) before 2.4.4, and freeswan in SUSE LINUX 9.1 before 2.04_1.5.4-1.23, allow remote attackers to cause a denial of service via (1) a crafted packet using 3DES with an invalid key length, or (2) unspecified inputs when Aggressive Mode is enabled and the PSK is known, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1.

NVD Source

Technical Analysis

CVE-2005-3671 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
AvailabilityC
AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected Vendors & Products

frees_wan1 product(s)
frees wan
openswan1 product(s)
openswan
xelerance1 product(s)
openswan
Source: NVD CPE · 9 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

PATCHhttp://www.openswan.org/niscc2/
PATCHhttp://www.securityfocus.com/bid/15416
PATCHhttp://www.openswan.org/niscc2/
PATCHhttp://www.securityfocus.com/bid/15416
ADVISORYhttp://www.kb.cert.org/vuls/id/226364
ADVISORYhttp://www.niscc.gov.uk/niscc/docs/re-20051114-01014.pdf?lang=en
ADVISORYhttp://www.kb.cert.org/vuls/id/226364
ADVISORYhttp://www.niscc.gov.uk/niscc/docs/re-20051114-01014.pdf?lang=en

All References (34)

→
http://archives.neohapsis.com/archives/bugtraq/2005-12/0138.html
→
http://archives.neohapsis.com/archives/bugtraq/2005-12/0161.html
→
http://jvn.jp/niscc/NISCC-273756/index.html
→
http://secunia.com/advisories/17581
→
http://secunia.com/advisories/17680
→
http://secunia.com/advisories/17980
→
http://secunia.com/advisories/18115
→
http://securitytracker.com/id?1015214
→
http://www.ee.oulu.fi/research/ouspg/protos/testing/c09/isakmp/Exploit
→
http://www.gentoo.org/security/en/glsa/glsa-200512-04.xml
→
http://www.kb.cert.org/vuls/id/226364Third Party Advisory · US Government Resource
→
http://www.niscc.gov.uk/niscc/docs/re-20051114-01014.pdf?lang=enVendor Advisory
→
http://www.novell.com/linux/security/advisories/2005_70_ipsec.html
→
http://www.openswan.org/niscc2/Patch · Vendor Advisory
→
http://www.redhat.com/archives/fedora-announce-list/2005-November/msg00057.html

Quick Facts

CVE IDCVE-2005-3671
CVSS Score7.8 / 10
SeverityHIGH
WeaknessNVD-CWE-Other
CISA KEVNo
Affected3 vendor(s)
PublishedNov 18, 2005

Related CVEs (NVD-CWE-Other)

CVE-2005-1740
10.0
CVE-2005-1693
10.0
CVE-2005-1738
10.0
CVE-2004-0246
10.0
CVE-2005-1596
10.0
CVE-2005-1256
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2005-3671 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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