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Insecure Library Loading
Moderately critical

Citrix Presentation Server Print Provider Buffer Overflow Vulnerability

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Release Date:  2007-01-25    Views:  13,114

Secunia Advisory SA23869

Where:

From local network

Impact:

System access

Solution Status:

Vendor Patch

CVE Reference(s):

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 a print provider (ccprov.dll) when handling arguments passed to the "EnumPrintersW()" and "OpenPrinter()" functions. This can be exploited to e.g. cause a stack-based buffer overflow by passing an overly long string (more than 130 bytes) as the first argument to the "OpenPrinter()" function through a local API call or RPC request.

Successful exploitation allows execution of arbitrary code.

The vulnerability reportedly affects Citrix MetaFrame XP and Presentation Server version 4.0 and prior.


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

Provided and/or discovered by:
Discovered by an anonymous researcher and reported via ZDI.

Original Advisory:
Citrix:
http://support.citrix.com/article/CTX111686

ZDI:
http://www.zerodayinitiative.com/advisories/ZDI-07-006.html

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Citrix Presentation Server Print Provider Buffer Overflow Vulnerability

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