ZDI-11-089: Novell ZenWorks TFTPD Remote Code Execution Vulnerability

[ZDI Disclosures <zdi-disclosures@xxxxxxxxxxxxxxxx>]

ZDI-11-089: Novell ZenWorks TFTPD Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-089

February 17, 2011

-- CVE ID:
CVE-2010-4323 

-- CVSS:
10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)

-- Affected Vendors:
Novell

-- Affected Products:
Novell Zenworks

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 2132. 
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 Zenworks Configuration Manager. 
Authentication is not required to exploit this vulnerability. 

The flaw exists within the novell-tftp.exe component which listens by
default on UDP port 69. When handling a request the process blindly
copies user supplied data into a fixed-length buffer on the heap. A
remote attacker can exploit this vulnerability to execute arbitrary code
under the context of the ZenWorks user.

-- Vendor Response:
Novell has issued an update to correct this vulnerability. More
details can be found at:

http://www.novell.com/support/php/search.do?cmd=displayKC&docType=kc&externalId=7007896&sliceId=2&docTypeID=DT_TID_1_1&dialogID=205671351&stateId=0%200%20205669596

-- Disclosure Timeline:
2010-08-23 - Vulnerability reported to vendor
2011-02-17 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Francis Provencher for Protek Researchh Lab's
    * AbdulAziz Hariri of ThirdEyeTesters
    * SilentSignal

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