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TITLE:
Cisco Global Site Selector DNS Request Denial of Service

SECUNIA ADVISORY ID:
SA33429

VERIFY ADVISORY:
http://secunia.com/advisories/33429/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

OPERATING SYSTEM:
Cisco Global Site Selector (GSS) System Software 3.x
http://secunia.com/advisories/product/20943/
Cisco Global Site Selector (GSS) System Software 2.x
http://secunia.com/advisories/product/20942/
Cisco Global Site Selector (GSS) System Software 1.x
http://secunia.com/advisories/product/12529/

DESCRIPTION:
A vulnerability has been reported in Cisco Global Site Selector,
which can be exploited by malicious people to cause a DoS (Denial of
Service).

The vulnerability is caused due to an unspecified error in the
processing of DNS request, which can be exploited to crash the DNS
server via a specially crafted sequence of DNS requests.

Successful exploitation requires that GSS is not configured with the
optional Cisco Network Registrar (CNR) software.

The vulnerability is reported in versions prior to 3.0(1) of the
following GSS products:
* Cisco GSS 4480 Global Site Selector
* Cisco GSS 4490 Global Site Selector
* Cisco GSS 4491 Global Site Selector
* Cisco GSS 4492R Global Site Selector

SOLUTION:
Update to version 3.0(1) or later.
http://www.cisco.com/pcgi-bin/tablebuild.pl/gss-3des?psrtdcat20e2

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://www.cisco.com/warp/public/707/cisco-sa-20090107-gss.shtml

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