Threat Alert Tile

Threat Alert: Cisco Adaptive Security Appliance and Firepower Threat Defense

April 25, 2024

Cisco has released security updates to address ArcaneDoor—exploitation of Cisco Adaptive Security Appliances (ASA) devices and Cisco Firepower Threat Defense (FTD) software. A threat actor could exploit vulnerabilities (CVE-2024-20353, CVE-2024-20359, CVE-2024-20358) to take control of an affected system.  

Cisco has reported active exploitation of CVE 2024-20353 and CVE-2024-20359 and CISA has added these vulnerabilities to its Known Exploited Vulnerabilities Catalog.  

Cisco has releasedpatches for CVE-2024-20353 and CVE-2024-20359, provided indicators of compromise, Snort signatures, and has outlined several methods for locating the Line Runner backdoor on ASA devices. 

Organizations using Cisco ASA are advised to implement the patches as soon as possible as there are no workarounds that can address the two vulnerabilities. 

Quadrant strongly encourages administrators to apply the necessary updates, hunt for any malicious activity, and review the following articles for more information: 

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