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Zero Day Initiative Advisory 12-102

Zero Day Initiative Advisory 12-102
Posted Jun 28, 2012
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 12-102 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Novell iPrint Client. User interaction is required in that a target must visit a malicious page or open a malicious file. The flaw exists within the exposed GetDriverSettings method in the nipplib component imported by ienipp and npnipp. When encountering a realm parameter this user supplied value's length is not properly verified before copying into a fixed length buffer on the stack. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the process.

tags | advisory, remote, arbitrary
advisories | CVE-2011-4187
SHA-256 | dad2278a888a8b86768114f8246f8e419ae73d969cf93902e9da0f392a230cc8

Zero Day Initiative Advisory 12-102

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ZDI-12-102 : Novell iPrint Client nipplib.dll GetDriverSettings realm
Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-102
June 27, 2012

- -- CVE ID:
CVE-2011-4187

- -- 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 12404.
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 in that a target must visit a malicious page or open a malicious
file.

The flaw exists within the exposed GetDriverSettings method in the nipplib
component imported by ienipp and npnipp. When encountering a realm
parameter this user supplied value's length is not properly verified before
copying into a fixed length buffer on the stack. A remote attacker can
exploit this vulnerability to execute arbitrary code under the context of
the process.

- -- Vendor Response:
Novell has issued an update to correct this vulnerability. More details can
be found at:
http://www.novell.com/support/viewContent.do?externalId=7010143

- -- Disclosure Timeline:
2011-10-21 - Vulnerability reported to vendor
2012-06-27 - Coordinated public release of advisory

- -- Credit:
This vulnerability was discovered by:

* gwslabs.com

- -- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

http://www.zerodayinitiative.com/advisories/disclosure_policy/

Follow the ZDI on Twitter:

http://twitter.com/thezdi

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