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Vulnerability record · CVE-2016-10396 · published 6 July 2017

CVE-2016-10396: Ipsec-tools vulnerability

IIpsec Tools · Ipsec Tools

The racoon daemon in IPsec-Tools 0.8.2 contains a remotely exploitable computational-complexity attack when parsing and storing ISAKMP fragments. The implementation permits a remote attacker to exhaust computational resources on the remote endpoint by repeatedly sending ISAKMP fragment packets in a particular order such that the worst-case computational complexity is realized in the algorithm utilized to determine if reassembly of the fragments can take place.

7.5 CVSS 3.0 High EPSS 2.9% · top 13.5% CWE-407 · CWE-407
7.5CVSS 3.0 base score, v2 7.8
2.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

The racoon daemon in IPsec-Tools 0.8.2 contains a remotely exploitable computational-complexity attack when parsing and storing ISAKMP fragments. The implementation permits a remote attacker to exhaust computational resources on the remote endpoint by repeatedly sending ISAKMP fragment packets in a particular order such that the worst-case computational complexity is realized in the algorithm utilized to determine if reassembly of the fragments can take place.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

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

References

LinkTags
http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmp_frag.c.diff?r1=1.5&r2=1.5.36.1 Mailing ListThird Party Advisory
http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmp_frag.c?only_with_tag=MAIN Third Party Advisory
https://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=51682 Mailing ListThird Party Advisory
http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmp_frag.c.diff?r1=1.5&r2=1.5.36.1 Mailing ListThird Party Advisory
http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmp_frag.c?only_with_tag=MAIN Third Party Advisory
https://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=51682 Mailing ListThird Party Advisory

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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%7.8CVE-2005-3732Ipsec-tools vulnerabilityThe Internet Key Exchange version 1 (IKEv1) implementation (isakmp_agg.c) in racoon in ipsec-tools before 0.6.3, when running in aggressive mode, all…EPSS 4.4%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-2016-10396), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.