HOMEVULNERABILITIESCVE-2016-10396
HIGH

CVE-2016-10396

CWE-407Published: July 6, 2017· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2016-10396 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

ipsec-tools1 product(s)
ipsec-tools
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://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmp_frag.c.diff?r1=1.5&r2=1.5.36.1
ADVISORYhttp://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmp_frag.c?only_with_tag=MAIN
ADVISORYhttps://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=51682
ADVISORYhttp://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmp_frag.c.diff?r1=1.5&r2=1.5.36.1
ADVISORYhttp://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmp_frag.c?only_with_tag=MAIN
ADVISORYhttps://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=51682

All References (6)

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

Quick Facts

CVE IDCVE-2016-10396
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-407
CISA KEVNo
Affected1 vendor(s)
PublishedJul 6, 2017

Related CVEs (CWE-407)

CVE-2026-58226
8.7
CVE-2026-43967
8.7
CVE-2026-54892
8.7
CVE-2026-57480
8.7
CVE-2026-55206
8.7
CVE-2022-45061
7.5

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2016-10396 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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