ZDI-10-298: Novell iPrint Client Netscape Plugin call-back-url Parameter Remote Code Execution Vulnerability

[ZDI Disclosures <zdi-disclosures () tippingpoint com>]

ZDI-10-298: Novell iPrint Client Netscape Plugin call-back-url Parameter Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-10-298

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 npnipp.dll Mozilla browser plugin for iPrint
client. When assembling a URL using the user supplied call-back-url, the
value is passed into a urlencode function where it is copied 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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