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Date: Wed, 08 Feb 2012 11:46:10 -0600
From: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Subject: ZDI-12-031 : Novell iPrint Server
 attributes-natural-language Remote Code Execution Vulnerability

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ZDI-12-031 : Novell iPrint Server attributes-natural-language Remote
Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-031
February  8, 2012

- -- CVE ID:
CVE-2011-4194

- -- 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 12044.
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 Server. Authentication is not
required to exploit this vulnerability.

The flaw exists within the mod_ipp apache module component of the
iprint-server, which listens by default on 631/tcp. During the handling
of get-printer-attributes requests containing a
attributes-natural-language attribute cause a validation routine to be
hit. When validating this parameter the contents of the attribute are
copied, without validation, to 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=7010084




- -- Disclosure Timeline:
2011-10-21 - Vulnerability reported to vendor

2012-02-08 - Coordinated public release of advisory



- -- Credit:
This vulnerability was discovered by:

* G. Geshev



- -- 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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