ipsec-tools: Parsing and storing ISAKMP fragments in malicious order can exhaust resources
Published Jul 6, 2017
7.5
HIGHCVSS 3.0
EPSS 2.93%
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.
Affected products
No data.
- 0.8.2
No data.
Red Hat Enterprise Linux 5
ipsec-tools
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | ipsec-tools | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.93% (0.02928) | 86.59th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.93% (0.02928) | 85.23th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.40% (0.01400) | 78.66th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.78% (0.03778) | 79.87th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.40% (0.01400) | 79.11th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.44% (0.00441) | 75.67th | v3 (v2023.03.01) |
| May 24, 2024 | 0.26% (0.00258) | 65.49th | v3 (v2023.03.01) |
| May 10, 2024 | 0.22% (0.00216) | 59.46th | v3 (v2023.03.01) |
| Apr 25, 2024 | 0.18% (0.00183) | 54.97th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.17% (0.00171) | 53.09th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.15% (0.00155) | 50.57th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.44% (0.00441) | 70.83th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.14% (0.01136) | 59.45th | v2 (v2022.01.01) |
| Oct 18, 2022 | 1.14% (0.01136) | 58.28th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.14% (0.01136) | 56.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.14% (0.01136) | 34.23th | v2 (v2022.01.01) |
References (7)
- 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 x_refsource_CONFIRMMailing ListThird Party Advisory
- http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmp_frag.c?only_with_tag=MAIN x_refsource_CONFIRMThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2016-10396 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1470232 Issue Tracking
- https://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=51682 x_refsource_CONFIRMMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-10396
- https://www.cve.org/CVERecord?id=CVE-2016-10396
| Link | Providers | Tags |
|---|---|---|
| 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 | x_refsource_CONFIRMMailing ListThird Party Advisory | |
| http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmp_frag.c?only_with_tag=MAIN | x_refsource_CONFIRMThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2016-10396 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1470232 | Issue Tracking | |
| https://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=51682 | x_refsource_CONFIRMMailing ListThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-10396 | ||
| https://www.cve.org/CVERecord?id=CVE-2016-10396 |
Change history (0)
No recorded changes yet.