ZDI-10-090: Novell ZENworks Configuration Management Preboot Service Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-090
June 1, 2010

-- 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 9755. 
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. Authentication is not
required to exploit this vulnerability.

The specific flaw exists within the Preboot Service (novell-pbserv.exe).
This service listens for incoming connections on TCP port 998. The
service uses a simple binary protocol where the first DWORD is an opcode
followed by the specific opcode's data, typically in length/value pairs.
These length values are not checked against the destination buffers size
allowing for stack-based overflows to occur. This can lead to arbitrary
code execution in the context of the SYSTEM user.

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

http://www.novell.com/support/search.do?cmd=displayKC&docType=kc&externalId=7005572&sliceId=1&docTypeID=DT_TID_1_1&dialogID=138523325&stateId=0%200%20138517923

-- Disclosure Timeline:
2010-02-09 - Vulnerability reported to vendor
2010-06-01 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Stephen Fewer of Harmony Security (www.harmonysecurity.com)

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