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Cisco ASA Software TCP Normalizer Denial of Service Vulnerability
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
A vulnerability in the TCP normalizer of Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause Cisco ASA to drop any further incoming traffic on all interfaces, resulting in a denial of service (DoS) condition.
Insight
Insight
The vulnerability is due to improper limitation of the global out-of-order TCP queue for specific block sizes. An attacker could exploit this vulnerability by sending a large number of unique permitted TCP connections with out-of-order segments.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
See the referenced vendor advisory for a solution.