Cisco ASA Software Vulnerability Could Lead to Unauthorized Reload and Denial of Service

CVE-2020-27124

What is CVE-2020-27124?

A flaw exists in the SSL/TLS handler of Cisco Adaptive Security Appliance (ASA) Software that enables an unauthenticated remote attacker to disrupt normal operations by causing the affected device to unexpectedly reload. This situation arises from improper error handling during established SSL/TLS connections. An attacker can exploit this by initiating an SSL/TLS connection and transmitting a specially crafted malicious message, resulting in a potential denial of service (DoS) condition. Cisco has issued software updates to mitigate this risk; however, no workarounds are available.

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