CVE-2021-40125

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to trigger a denial of service (DoS) condition on an affected device. This vulnerability is due to improper control of a resource. An attacker with the ability to spoof a trusted IKEv2 site-to-site VPN peer and in possession of valid IKEv2 credentials for that peer could exploit this vulnerability by sending malformed, authenticated IKEv2 messages to an affected device. A successful exploit could allow the attacker to trigger a reload of the device.

• CVE ID
• CVE-2021-40125

• Assigner
• ykramarz@cisco.com

• Vulnerability Status
• Analyzed

• Published Version
• 2021-10-27T19:15:08

• Last Modified Date
• 2021-10-29T14:09:01

• Version
• 2.0

• Vector String
• AV:N/AC:M/Au:S/C:N/I:N/A:C

• Access Vector
• NETWORK

• Access Compatibility
• MEDIUM

• Authentication
• SINGLE

• Confidentiality Impact
• NONE

• Integrity Impact
• NONE

• Availability Impact
• COMPLETE

• Base Score
• 6.3

• Severity
• MEDIUM

• Exploitability Score
• 6.8

• Impact Score
• 6.9

• Version
• 3.1

• Vector String
• CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

• Attack Vector
• NETWORK

• Attack Compatibility
• LOW

• Privileges Required
• LOW

• User Interaction
• NONE

• Scope
• UNCHANGED

• Confidentiality Impact
• NONE

• Availability Impact
• HIGH

• Base Score
• 6.5

• Base Severity
• MEDIUM

• Exploitability Score
• 2.8

• Impact Score
• 3.6