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Servers and applications

CVE-2006-3906

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…

Severity
Medium 5.0
Published
27 Jul 2006
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
6.9% in the next 30 daysHigher than 94% of CVEs. EPSS by FIRST, 12 Nov 2026
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Sources
NVD

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.

From NVD.

Affected software

SoftwareAffected versions
Cisco ASA and Firepower Threat DefenseServers and applications · cpe:o:cisco:adaptive_security_appliance_software
  • Version 7.0
  • Version 7.0(4)
  • Version 7.0(5)
  • Version 7.0.1.4
  • Version 7.0.4.3
  • Version 7.1(2)

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2006-3906
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2006-3906