[NT] Citrix Presentation Server IMA Service Invalid Name Length DoS Vulnerability

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Citrix Presentation Server IMA Service Invalid Name Length DoS
Vulnerability
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SUMMARY

Citrix Presentation Server is a product designed to allow remote access to
applications over a network. Remote exploitation of an input validation
error in Citrix Systems Inc.'s Metaframe Presentation Server 4.0 IMA
service may allow an attacker to cause a denial of service (DoS)
condition.

DETAILS

Vulnerable Systems:
* Citrix Presentation Server version 4.0

The IMA (Independent Management Architecture) server component Citrix's
Presentation Server (previously known as Metaframe) contains an input
validation error in the handling of certain packet types. By constructing
a specific packet, it is possible to cause the service to reference an
unmapped memory address. This causes an unhandled exception, which in turn
causes the service to exit, resulting in a DoS condition.

Analysis:
Successful exploitation of this vulnerability would allow a remote
attacker to cause the IMA server component of the Citrix Presentation
Server to crash, preventing access to the resources being shared on the
server.

Vendor Response:
The vendor has released the following advisory to address this issue:
<http://support.citrix.com/article/CTX111186>
http://support.citrix.com/article/CTX111186

Disclosure Timeline:
07/03/2006 - Initial vendor notification
07/05/2006 - Initial vendor response
11/09/2006 - Coordinated public disclosure


ADDITIONAL INFORMATION

The information has been provided by
<mailto:idlabs-advisories@xxxxxxxxxxxx> iDefense Labs Security Advisories.
The original article can be found at:
<http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=441>
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=441



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