ZDI-10-297: Novell iPrint Client Netscape/ActiveX Location Header Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-10-297

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
HTTP 301 response from a user provided printer-url the process attempts
to copy the returned value within the Location HTTP header without
ensuring that the destination buffer is adequately sized. 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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