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To improve our services to our customers, we have made a number of
additions to the Secunia Advisories and have started translating the
advisories to German.

The improvements will help our customers to get a better
understanding of how we reached our conclusions, how it was rated,
our thoughts on exploitation, attack vectors, and scenarios.

This includes:
* Reason for rating
* Extended description
* Extended solution
* Exploit code or links to exploit code
* Deep links

Read the full description:
http://corporate.secunia.com/products/48/?r=l

Contact Secunia Sales for more information:
http://corporate.secunia.com/how_to_buy/15/?r=l

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TITLE:
Citrix Presentation Server IMA Service Vulnerabilities

SECUNIA ADVISORY ID:
SA22802

VERIFY ADVISORY:
http://secunia.com/advisories/22802/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From local network

SOFTWARE:
Citrix Presentation Server 4.x
http://secunia.com/product/5270/
Citrix MetaFrame XP for Windows 1.x
http://secunia.com/product/178/
Citrix MetaFrame Presentation Server 3.x
http://secunia.com/product/3805/

DESCRIPTION:
Two vulnerabilities have been reported in Citrix Presentation Server,
which can be exploited by malicious people to cause a DoS (Denial of
Service) or compromise a vulnerable system.

1) An error exists within the "IMA_SECURE_DecryptData1()" function in
ImaSystem.dll when decrypting authentication data. This can be
exploited to cause a heap-based buffer overflow by sending specially
crafted data to the Independent Management Architecture (IMA) service
(default port 2512/tcp or 2513/tcp).

Successful exploitation may allow execution of arbitrary code.

2) An input validation error in the handling of certain packet types
in the Independent Management Architecture (IMA) service can be
exploited to crash the service.

SOLUTION:
Apply hotfix (see vendor advisory for details).

PROVIDED AND/OR DISCOVERED BY:
1) Eric Detoisien and an anonymous person.
2) Eirc Detoisien

ORIGINAL ADVISORY:
Citrix:
http://support.citrix.com/article/CTX111186

ZDI:
http://www.zerodayinitiative.com/advisories/ZDI-06-038.html

iDefense:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=441

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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.

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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
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