ZDI-10-296: Novell iPrint Client Netscape/ActiveX IPP Parameter Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-10-296

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 10749.
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 nipplib.dll component which is used by both
the Mozilla and IE browser plugins for iPrint Client. When handling an
IPP response from a user provided printer-url the process does not
properly validate the size of the destination buffer and copies user
supplied data of an arbitrary length into a fixed length buffer on the
heap. 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:
2010-11-30 - 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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