Zero-Day Vulnerability in Cisco Products Could Cause DoS Condition

Threat actors are exploiting a zero-day vulnerability in Cisco Adaptive Security Appliance and Cisco Firepower Threat Defense software to cause a denial-of-service (DoS) condition by triggering a device reboot. The vulnerability is present in the Session Initiated Protocol (SIP) inspection engine turned on by default and can be triggered by sending SIP requests to the affected appliance. Exploiting the flaw can be done remotely and without authentication. While there are currently no software updates to address the vulnerability, there are multiple mitigation options. The NJCCIC recommends reviewing the Cisco Security Advisory for more information, a list of vulnerable products, and available mitigation techniques.

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