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Test ID:1.3.6.1.4.1.25623.1.0.105350
Category:CISCO
Title:Cisco Web Security Appliance DNS Resolution Vulnerability
Summary:Cisco Web Security Appliance contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition.
Description:Summary:
Cisco Web Security Appliance contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition.

Vulnerability Insight:
The vulnerability is due to the handling of DNS requests awaiting a DNS response when new, incoming DNS requests
are received. An attacker could exploit this vulnerability by sending TCP proxy traffic to the WSA at a high rate. An exploit could allow the attacker
to cause a partial DoS condition because DNS name resolution fails, which results in the client receiving a HTTP 503 'Service Unavailable' error.

Vulnerability Impact:
An unauthenticated, remote attacker could exploit this vulnerability to cause a DoS condition due to DNS
name resolution failure through the affected device. This could result in the client receiving an HTTP 'Service Unavailable' error.

Affected Software/OS:
Cisco WSA versions 8.0.6-078 and 8.0.6-115 are vulnerable.

Solution:
Updates are available. Please see the vendor advisory for more information.

CVSS Score:
5.0

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

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2015-6287
BugTraq ID: 76677
http://www.securityfocus.com/bid/76677
Cisco Security Advisory: 20150909 Cisco Web Security Appliance DNS Resolution Vulnerability
http://tools.cisco.com/security/center/viewAlert.x?alertId=40846
http://www.securitytracker.com/id/1033529
CopyrightThis script is Copyright (C) 2015 Greenbone Networks GmbH

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