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TITLE:
Citrix Presentation Server IMA Service Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA28508

VERIFY ADVISORY:
http://secunia.com/advisories/28508/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From local network

SOFTWARE:
Citrix MetaFrame Presentation Server 3.x
http://secunia.com/product/3805/
Citrix Presentation Server 4.x
http://secunia.com/product/5270/
Citrix Access Essentials 1.x
http://secunia.com/product/14311/
Citrix Access Essentials 2.x
http://secunia.com/product/16553/
Citrix Desktop Server 1.x
http://secunia.com/product/17223/

DESCRIPTION:
A vulnerability has been reported in Citrix Presentation Server,
which can be exploited by malicious people to compromise a vulnerable
system.

The vulnerability is caused due to a boundary error in the IMA
service and can be exploited to cause a buffer overflow via a
specially crafted packet sent to port 2512/TCP or 2513/TCP.

Successful exploitation allows execution of arbitrary code.

The vulnerability affects the following products and versions:
* Citrix MetaFrame Presentation Server 3.0 for Microsoft Windows
2000
* Citrix MetaFrame Presentation Server 3.0 for Microsoft Windows
2003
* Citrix Presentation Server 4.0 for Microsoft Windows 2000
* Citrix Presentation Server 4.0 for Microsoft Windows 2003
* Citrix Presentation Server 4.0 x64 Edition
* Citrix Presentation Server 4.5 for Windows Server 2003 Russian
Edition
* Citrix Presentation Server 4.5 for Windows Server 2003
* Citrix Presentation Server 4.5 for Windows Server 2003 x64 Edition
* Citrix Access Essentials 1.0
* Citrix Access Essentials 1.5
* Citrix Access Essentials 2.0
* Citrix Desktop Server 1.0
* Citrix Desktop Server 1.0 x64

SOLUTION:
Apply hotfix (see vendor advisory for details).
http://support.citrix.com/article/CTX114487

PROVIDED AND/OR DISCOVERED BY:
The vendor credits TippingPoint/ZDI.

ORIGINAL ADVISORY:
CTX114487:
http://support.citrix.com/article/CTX114487

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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