MEDIUM
Internet Key Exchange (IKE) version 1 protocol, as implemented on Cisco IOS, VPN 3000 Concentrators, and PIX firewalls, allows remote attackers to cause a denial of service (resource exhaustion) via a flood of IKE Phase-1 packets that exceed the session expiration rate
Published Jul 27, 2006
5.0
MEDIUMCVSS 2.0
EPSS 6.87%
Description
Internet Key Exchange (IKE) version 1 protocol, as implemented on Cisco IOS, VPN 3000 Concentrators, and PIX firewalls, allows remote attackers to cause a denial of service (resource exhaustion) via a flood of IKE Phase-1 packets that exceed the session expiration rate. NOTE: it has been argued that this is due to a design weakness of the IKE version 1 protocol, in which case other vendors and implementations would also be affected.
Affected products
No data.
AND
OR
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- 7.0
- 7.0\(4\)
- 7.0\(5\)
- 7.0.1.4
- 7.0.4.3
- 7.1\(2\)
- 2.0
- 2.5.2.a
- 2.5.2.b
- 2.5.2.c
- 2.5.2.d
- 2.5.2.f
- 3.0
- 3.0.3.a
- 3.0.3.b
- 3.0.4
- 3.1
- 3.1\(rel\)
- 3.1.1
- 3.1.2
- 3.1.4
- 3.5\(rel\)
- 3.5.1
- 3.5.2
- 3.5.3
- 3.5.4
- 3.5.5
- 3.6
- 3.6.1
- 3.6.3
- 3.6.5
- 3.6.7
- 3.6.7.a
- 3.6.7.b
- 3.6.7.c
- 3.6.7.d
- 3.6.7.f
- 3.6.7d
- 4.0
- 4.0.1
- 4.0.2
- 4.0.5.b
- 4.1
- 4.1.5.b
- 4.1.7.a
- 4.1.7.b
- 4.1.7.l
- 4.7
- 4.7\(rel\)
- 4.7.1
- 4.7.1.f
- 4.7.2
- 4.7.2.a
- 4.7.2.f
- 4.0.1
- 4.7\(rel\)
- 4.7.1
- 4.7.1.f
- 4.7.2
- 4.7.2.a
- 4.7.2.f
OR
- n/a
- 6.2.2_.111
- 6.2.3_\(110\)
- 6.3.3_\(133\)
- 6.3.5_\(112\)
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- 2.7
- 3.0
- 3.1
- 4.0
- 4.1\(6\)
- 4.1\(6b\)
- 4.2
- 4.2\(1\)
- 4.2\(2\)
- 4.2\(5\)
- 4.3
- 4.4
- 4.4\(4\)
- 4.4\(7.202\)
- 4.4\(8\)
- 5.0
- 5.1
- 5.1\(4\)
- 5.1\(4.206\)
- 5.2
- 5.2\(1\)
- 5.2\(2\)
- 5.2\(3.210\)
- 5.2\(5\)
- 5.2\(6\)
- 5.2\(7\)
- 5.2\(9\)
- 5.3
- 5.3\(1\)
- 5.3\(1.200\)
- 5.3\(2\)
- 5.3\(3\)
- 6.0
- 6.0\(1\)
- 6.0\(2\)
- 6.0\(3\)
- 6.0\(4\)
- 6.0\(4.101\)
- 6.1
- 6.1\(1\)
- 6.1\(2\)
- 6.1\(3\)
- 6.1\(4\)
- 6.1\(5\)
- 6.1.5\(104\)
- 6.2
- 6.2\(1\)
- 6.2\(2\)
- 6.2\(3\)
- 6.2\(3.100\)
- 6.3
- 6.3\(1\)
- 6.3\(2\)
- 6.3\(3\)
- 6.3\(3.102\)
- 6.3\(3.109\)
- 6.3\(5\)
No data.
No Red Hat product state for this CVE.
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.
No CVSS v3.0 score for this CVE.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
6.87% 0.06874
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.06874
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 (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 6.87% (0.06874) | 93.86th | v5 (v2026.06.15) |
| Jun 24, 2026 | 6.75% (0.06748) | 93.13th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.13% (0.03131) | 86.15th | v5 (v2026.06.15) |
| Oct 1, 2025 | 4.28% (0.04277) | 88.41th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.85% (0.02852) | 85.30th | v4 (v2025.03.14) |
| Dec 12, 2024 | 5.92% (0.05920) | 93.73th | v3 (v2023.03.01) |
| Jul 8, 2023 | 5.92% (0.05920) | 92.40th | v3 (v2023.03.01) |
| May 31, 2023 | 3.92% (0.03916) | 90.66th | v3 (v2023.03.01) |
| Apr 23, 2023 | 2.88% (0.02879) | 89.21th | v3 (v2023.03.01) |
| Mar 16, 2023 | 2.44% (0.02443) | 88.30th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.36% (0.02358) | 88.08th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
Weaknesses (0)
No CWE recorded.
References (10)
- http://archives.neohapsis.com/archives/bugtraq/2006-07/0531.html mailing-listx_refsource_BUGTRAQ
- http://securityreason.com/securityalert/1293 third-party-advisoryx_refsource_SREASON
- http://securitytracker.com/id?1016582 vdb-entryx_refsource_SECTRACK
- http://www.cisco.com/en/US/tech/tk583/tk372/tsd_technology_security_response09186a00806f33d4.html vendor-advisoryx_refsource_CISCO
- http://www.nta-monitor.com/posts/2006/07/cisco-concentrator-dos.html x_refsource_MISC
- http://www.osvdb.org/29068 vdb-entryx_refsource_OSVDB
- http://www.securityfocus.com/archive/1/441203/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/19176 vdb-entryx_refsource_BID
- https://exchange.xforce.ibmcloud.com/vulnerabilities/27972 vdb-entryx_refsource_XF
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5299 vdb-entrysignaturex_refsource_OVAL
| Link | Providers | Tags |
|---|---|---|
| http://archives.neohapsis.com/archives/bugtraq/2006-07/0531.html | mailing-listx_refsource_BUGTRAQ | |
| http://securityreason.com/securityalert/1293 | third-party-advisoryx_refsource_SREASON | |
| http://securitytracker.com/id?1016582 | vdb-entryx_refsource_SECTRACK | |
| http://www.cisco.com/en/US/tech/tk583/tk372/tsd_technology_security_response09186a00806f33d4.html | vendor-advisoryx_refsource_CISCO | |
| http://www.nta-monitor.com/posts/2006/07/cisco-concentrator-dos.html | x_refsource_MISC | |
| http://www.osvdb.org/29068 | vdb-entryx_refsource_OSVDB | |
| http://www.securityfocus.com/archive/1/441203/100/0/threaded | mailing-listx_refsource_BUGTRAQ | |
| http://www.securityfocus.com/bid/19176 | vdb-entryx_refsource_BID | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/27972 | vdb-entryx_refsource_XF | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5299 | vdb-entrysignaturex_refsource_OVAL |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jul 27, 2006
Updated Aug 7, 2024
Reserved Jul 27, 2006
Link CVE-2006-3906
CISA Vulnrichment
Updated n/a