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Test ID:1.3.6.1.4.1.25623.1.0.106052
Category:CISCO
Title:Cisco ASA DNS DoS Vulnerability (cisco-sa-20151021-asa-dns2)
Summary:A vulnerability in the DNS code of Cisco ASA may lead to a; denial of service.
Description:Summary:
A vulnerability in the DNS code of Cisco ASA may lead to a
denial of service.

Vulnerability 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.

Vulnerability Impact:
An unauthenticated, remote attacker could cause the system to
reload.

Affected Software/OS:
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.

Solution:
See the referenced vendor advisory for a solution.

CVSS Score:
7.8

CVSS Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:C

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2015-6326
Cisco Security Advisory: 20151021 Cisco ASA Software DNS Denial of Service Vulnerability
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151021-asa-dns2
http://www.securitytracker.com/id/1034156
CopyrightCopyright (C) 2015 Greenbone Networks GmbH

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