QID 317107

Date Published: 2021-11-10

QID 317107: Cisco Adaptive Security Appliance (ASA) Software Internet Key Exchange Version 2 (IKEv2) Site-to-Site Virtual Private Network (VPN) Denial of Service (DoS) Vulnerability (cisco-sa-asaftd-ikev2-dos-g4cmrr7C)

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) implementation of Cisco Adaptive Security Appliance (ASA) Software
could allow an authenticated, remote attacker to trigger a denial of service (DoS) condition on an affected device.

Affected Products
Cisco products if they were running a vulnerable release of Cisco ASA Software and were configured with at least one IKEv2 site-to-site VPN peer.

Vulnerable Releases
From 9.8 Prior to 9.8.4.40
From 9.9 Prior to 9.12.4.30
From 9.13 Prior to 9.14.3.9
From 9.15 Prior to 9.15.1.17
From 9.16 Prior to 9.16.2
Note: Potential detection as cannot confirm whether same crypto map in the same sequence number is identifying a peer for the IPsec (IKEv2) connection.

QID Detection Logic (Authenticated):
The check matches Cisco ASA OS version retrieved via Unix Auth using "version" command.

A successful exploit could allow the attacker to trigger a reload of the device.

  • CVSS V3 rated as High - 6.5 severity.
  • CVSS V2 rated as High - 6.3 severity.
    • Solution

    Customers are advised to refer to cisco-sa-asaftd-ikev2-dos-g4cmrr7C for more information.

    Vendor References

    CVEs related to QID 317107

    CVE-2021-40125 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-asaftd-ikev2-dos-g4cmrr7C URL Logo tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ikev2-dos-g4cmrr7C
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