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Cisco ASA DNS DoS 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 DNS code of Cisco ASA may lead to a denial of service.
Insight
Insight
A vulnerability in the DNS code could allow an unauthenticated, remote attacker to cause an affected system to reload. The vulnerability is due to improper processing of DNS packets. An attacker could exploit this vulnerability by sending a crafted request to an affected Cisco ASA device to cause it to generate a DNS request packet. The attacker would need to spoof the reply packet with a crafted DNS response.
Affected Software
Affected Software
Version 7.2, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 9.0, 9.1, 9.2, 9.3 and 9.4 on Cisco ASA 1000V Cloud Firewall, Cisco ASA 5500 Series Adaptive Security Appliances, Cisco ASA 5500-X Series Next-Generation Firewalls, Cisco ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers, Cisco Adaptive Security Virtual Appliance (ASAv), Cisco FirePOWER 9300 ASA Security Module
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Apply the appropriate updates from Cisco.