OS Command Injection in Cisco Firewall Threat Defense (FTD) and Cisco Adaptive Security Appliance (ASA) - CVE-2021-1476
Published: April 28, 2021
Vulnerability identifier: #VU52718
CSH Severity: Low
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-1476
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper input validation in the CLI of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software. A remote privileged user can pass specially crafted data to the application and execute arbitrary OS commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Cisco Firewall Threat Defense (FTD)
Cisco Adaptive Security Appliance (ASA)
Cisco Adaptive Security Appliance (ASA)
How to mitigate CVE-2021-1476
Install updates from vendor's website.
Cisco Firewall Threat Defense (FTD) - addressed in versions 6.6.4, 6.7.0.2
Cisco Adaptive Security Appliance (ASA) - addressed in versions 9.13.1.21, 9.14.2.13, 9.15.1.10
Cisco Adaptive Security Appliance (ASA) - addressed in versions 9.13.1.21, 9.14.2.13, 9.15.1.10