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Vulnerability record · CVE-2005-3732 · published 21 November 2005

CVE-2005-3732: Ipsec-tools vulnerability

IIpsec Tools · Ipsec Tools

The Internet Key Exchange version 1 (IKEv1) implementation (isakmp_agg.c) in racoon in ipsec-tools before 0.6.3, when running in aggressive mode, allows remote attackers to cause a denial of service (null dereference and crash) via crafted IKE packets, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1.

7.8 CVSS 2.0 High EPSS 4.4% · top 8.9% CWE-399 · CWE-399
7.8CVSS 2.0 base score
4.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
50References
16 Jun 2026Last modified by NVD

Description

The Internet Key Exchange version 1 (IKEv1) implementation (isakmp_agg.c) in racoon in ipsec-tools before 0.6.3, when running in aggressive mode, allows remote attackers to cause a denial of service (null dereference and crash) via crafted IKE packets, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1.

AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
ftp://patches.sgi.com/support/free/security/advisories/20060501-01-U.asc
http://archives.neohapsis.com/archives/bugtraq/2005-12/0161.html
http://cvs.sourceforge.net/viewcvs.py/ipsec-tools/ipsec-tools/src/racoon/isakmp_agg.c?r1=1.20.2.3&r2=1.20.2.4&diff_forma Patch
http://rhn.redhat.com/errata/RHSA-2006-0267.html
http://secunia.com/advisories/17668 PatchVendor Advisory
http://secunia.com/advisories/17822 Vendor Advisory
http://secunia.com/advisories/17980 Vendor Advisory
http://secunia.com/advisories/18115 Vendor Advisory
http://secunia.com/advisories/18616
http://secunia.com/advisories/18742 Vendor Advisory
http://secunia.com/advisories/19833 Vendor Advisory
http://secunia.com/advisories/20210 Vendor Advisory
http://securitytracker.com/id?1015254
http://sourceforge.net/mailarchive/forum.php?thread_id=9017454&forum_id=32000
http://www.debian.org/security/2006/dsa-965
http://www.ee.oulu.fi/research/ouspg/protos/testing/c09/isakmp/
http://www.gentoo.org/security/en/glsa/glsa-200512-04.xml
http://www.mandriva.com/security/advisories?name=MDKSA-2006:020
http://www.niscc.gov.uk/niscc/docs/re-20051114-01014.pdf?lang=en
http://www.novell.com/linux/security/advisories/2005_70_ipsec.html
http://www.securityfocus.com/archive/1/436343/100/0/threaded
http://www.securityfocus.com/bid/15523 Patch
http://www.vupen.com/english/advisories/2005/2521 Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9857
https://usn.ubuntu.com/221-1/
ftp://patches.sgi.com/support/free/security/advisories/20060501-01-U.asc
http://archives.neohapsis.com/archives/bugtraq/2005-12/0161.html
http://cvs.sourceforge.net/viewcvs.py/ipsec-tools/ipsec-tools/src/racoon/isakmp_agg.c?r1=1.20.2.3&r2=1.20.2.4&diff_forma Patch
http://rhn.redhat.com/errata/RHSA-2006-0267.html
http://secunia.com/advisories/17668 PatchVendor Advisory
http://secunia.com/advisories/17822 Vendor Advisory
http://secunia.com/advisories/17980 Vendor Advisory
http://secunia.com/advisories/18115 Vendor Advisory
http://secunia.com/advisories/18616
http://secunia.com/advisories/18742 Vendor Advisory
http://secunia.com/advisories/19833 Vendor Advisory
http://secunia.com/advisories/20210 Vendor Advisory
http://securitytracker.com/id?1015254
http://sourceforge.net/mailarchive/forum.php?thread_id=9017454&forum_id=32000
http://www.debian.org/security/2006/dsa-965

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2004-0607Ipsec-tools vulnerabilityThe eay_check_x509cert function in KAME Racoon successfully verifies certificates even when OpenSSL validation fails, which could allow remote attack…EPSS 5.4%7.8CVE-2015-4047Ipsec-tools null pointer dereference vulnerabilityracoon/gssapi.c in IPsec-Tools 0.8.2 allows remote attackers to cause a denial of service (NULL pointer dereference and IKE daemon crash) via a serie…EPSS 9.8%7.8CVE-2008-3652Ipsec-tools vulnerabilitysrc/racoon/handler.c in racoon in ipsec-tools does not remove an "orphaned ph1" (phase 1) handle when it has been initiated remotely, which allows re…EPSS 3.4%7.5CVE-2016-10396Ipsec-tools vulnerabilityThe racoon daemon in IPsec-Tools 0.8.2 contains a remotely exploitable computational-complexity attack when parsing and storing ISAKMP fragments. The…EPSS 2.9%5.0CVE-2009-1632Ipsec-tools vulnerabilityMultiple memory leaks in Ipsec-tools before 0.7.2 allow remote attackers to cause a denial of service (memory consumption) via vectors involving (1) …EPSS 2.0%5.0CVE-2009-1574Ipsec-tools vulnerabilityracoon/isakmp_frag.c in ipsec-tools before 0.7.2 allows remote attackers to cause a denial of service (crash) via crafted fragmented packets without …EPSS 12%5.0CVE-2005-0398Ipsec-tools vulnerabilityThe KAME racoon daemon in ipsec-tools before 0.5 allows remote attackers to cause a denial of service (crash) via malformed ISAKMP packets.EPSS 2.4%4.3CVE-2007-1841Ipsec-tools vulnerabilityThe isakmp_info_recv function in src/racoon/isakmp_inf.c in racoon in Ipsec-tools before 0.6.7 allows remote attackers to cause a denial of service (…EPSS 2.9%

Source: NIST National Vulnerability Database (record CVE-2005-3732), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.