Resource exhaustion in Cisco Firewall Threat Defense (FTD) and Cisco Adaptive Security Appliance (ASA) - CVE-2020-3554
Published: October 21, 2020 / Updated: October 27, 2020
Vulnerability identifier: #VU47941
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-2020-3554
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 application does not properly control consumption of internal resources in the TCP packet processing. A remote attacker can send a high rate of crafted TCP traffic through an affected device, trigger resource exhaustion and perform a denial of service (DoS) attack.
Affected software
Cisco Firewall Threat Defense (FTD)
Cisco Adaptive Security Appliance (ASA)
Cisco Adaptive Security Appliance (ASA)
How to mitigate CVE-2020-3554
Install update from vendor's website.
Cisco Firewall Threat Defense (FTD) - addressed in versions 6.4.0.10, 6.5.0.5, 6.6.1
Cisco Adaptive Security Appliance (ASA) - update to 9.12.4.3
Cisco Adaptive Security Appliance (ASA) - update to 9.12.4.3