CVE Vulnerabilities

CVE-2021-40125

Use After Free

Published: Oct 27, 2021 | Modified: Nov 21, 2024
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
6.3 MEDIUM
AV:N/AC:M/Au:S/C:N/I:N/A:C
RedHat/V2
RedHat/V3
Ubuntu

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.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Name Vendor Start Version End Version
Firepower_threat_defense Cisco * 6.4.0.13 (excluding)
Firepower_threat_defense Cisco 6.6.0 (including) 6.6.5 (excluding)
Firepower_threat_defense Cisco 6.7.0 (including) 6.7.0.3 (excluding)
Firepower_threat_defense Cisco 7.0.0 (including) 7.0.1 (excluding)
Adaptive_security_appliance_software Cisco 9.8.0 (including) 9.8.4.40 (excluding)
Adaptive_security_appliance_software Cisco 9.9.0 (including) 9.12.4.30 (excluding)
Adaptive_security_appliance_software Cisco 9.14.0 (including) 9.14.3.9 (excluding)
Adaptive_security_appliance_software Cisco 9.15.0 (including) 9.15.1.17 (excluding)
Adaptive_security_appliance_software Cisco 9.16.0 (including) 9.16.2 (excluding)

Potential Mitigations

References