SB2021102807 - Denial of service in IKEv2 Site-to-Site VPN implementation in Cisco Adaptive Security Appliance and Firepower Threat Defense
Published: October 28, 2021
Security Bulletin ID
SB2021102807
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2021-40125)
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error in the Internet Key Exchange Version 2 (IKEv2) implementation. A remote authenticated user can send specially crafted authenticated IKEv2 messages to the affected system, trigger a use-after-free error and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.