Cisco Global Site Selector DNS requests denial of service

cisco-gss-dnsrequests-dos (47787)

Medium Risk

Description:

Cisco Application Control Engine Global Site Selector (GSS) is vulnerable to a denial of service, caused by an error when processing DNS requests. By sending a specially-crafted DNS request, a remote attacker could exploit this vulnerability to crash the DNS service.

*CVSS:

Base Score:	7.8
Access Vector:	Network
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Complete
Temporal Score:	5.8
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Denial of Service

Remedy:

Refer to cisco-sa-20090107-gss for patch, upgrade or suggested workaround information. See References.

References:

• cisco-sa-20090107-gss : Cisco Security Advisory: Cisco Global Site Selector Appliances DNS Vulnerability.
• BID-33152: Cisco Global Site Selector DNS Server Remote Denial Of Service Vulnerability
• CVE-2008-3819: dnsserver in Cisco Application Control Engine Global Site Selector (GSS) before 3.0(1) allows remote attackers to cause a denial of service (daemon crash) via a series of crafted DNS requests, aka Bug ID CSCsj70093.
• SA33429: Cisco Global Site Selector DNS Request Denial of Service
• SECTRACK ID: 1021530: Cisco Application Control Engine Global Site Selector DNS Bug Lets Remote Users Deny Service

Platforms Affected:

• Cisco GSS 4480 Global Site Selector
• Cisco GSS 4490 Global Site Selector
• Cisco GSS 4491 Global Site Selector
• Cisco GSS 4492R Global Site Selector

Reported:

Jan 07, 2009

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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