full-disclosure - ZDI-10-021: Novell NetStorage xsrvd Long Pathname Remote Code Execution Vulnerability

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Message-ID: <EE499D69B3D0714590B6FE9762B0461103881458A5@emb01.unity.local>
Date: Tue, 23 Feb 2010 17:00:00 -0600
From: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
To: "'full-disclosure@...ts.grok.org.uk'" <full-disclosure@...ts.grok.org.uk>, 
	"'bugtraq@...urityfocus.com'" <bugtraq@...urityfocus.com>
Subject: ZDI-10-021: Novell NetStorage xsrvd Long Pathname
 Remote Code Execution Vulnerability

ZDI-10-021: Novell NetStorage xsrvd Long Pathname Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-021
February 23, 2010

-- Affected Vendors:
Novell

-- Affected Products:
Novell NetStorage

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 9290. 
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 NetStorage. Authentication is not
required to exploit this vulnerability.

The specific flaws exists within the xsrvd process during the wide
character conversion of requested file paths. In conjunction with a long
username value the  file path conversion will result in a heap overflow
corrupting a chunk that will be immediately freed. This can be leveraged
by remote attackers to compromise the NetStorage server.

-- 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=7005282

-- Disclosure Timeline:
2009-10-21 - Vulnerability reported to vendor
2010-02-23 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * 1c239c43f521145fa8385d64a9c32243

-- 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/
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