ZDI-10-299: Novell iPrint Client Netscape/ActiveX Plugin Wide Character IPP Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-10-299

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. Authentication is not
required to exploit this vulnerability.

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
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:
2010-11-30 - 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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