ZDI-10-295: Novell iPrint Client Netscape/ActiveX printer-state-reasons Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-10-295

December 26, 2010

-- CVSS:
9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)

-- Affected Vendors:
Novell

-- Affected Products:
Novell iPrint

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 10758.
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Novell iPrint Client. User interaction is
required to exploit this vulnerability in that the target must visit a
malicious page or open a malicious file.

The flaw exists within the both the Netscape (Firefox) and ActiveX
(Internet Explorer) plugin components npnipp.dll and ienipp.ocx which
are installed by default with the iPrint client. When handling the
printer-state-reasons operation provided via the embed tag the module
makes a request to the specified printer-url and performs insufficient
validation of the size of the printer-state-reasons status response.
The process then copies this user supplied data into a fixed-length
buffer on the stack. A remote attacker can exploit this vulnerability to
execute arbitrary code under the context of the browser.

-- Vendor Response:
Novell states:
The fix for this security vulnerability is included in the released
"iPrint Client for Windows XP/Vista/Win 7 5.56" patch, available at
http://download.novell.com/Download?buildid=JV7fd0tFHHM~.

-- Disclosure Timeline:
2010-12-06 - Vulnerability reported to vendor
2010-12-26 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Ivan Rodriguez Almuina

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