Resource exhaustion in Cisco Systems, Inc products - CVE-2021-34792
Published: October 28, 2021
Vulnerability identifier: #VU57754
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-34792
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper resource management when handling high connection rates. A remote attacker can establish a significant number of connections on an affected device and perform a denial of service attack.
Affected software
ASA 5500-X Series Firewalls
Cisco Secure Firewall Threat Defense (FTD)
Cisco Secure Firewall Adaptive Security Appliance (ASA)
Cisco Secure Firewall Threat Defense (FTD)
Cisco Secure Firewall Adaptive Security Appliance (ASA)
How to mitigate CVE-2021-34792
Install updates from vendor's website.
Cisco Secure Firewall Threat Defense (FTD) - addressed in versions 6.6.5, 6.7.0.3, 7.0.1
Cisco Secure Firewall Adaptive Security Appliance (ASA) - addressed in versions 9.14.3.9, 9.15.1.17, 9.16.2.3
Cisco Secure Firewall Adaptive Security Appliance (ASA) - addressed in versions 9.14.3.9, 9.15.1.17, 9.16.2.3