ZDI-07-064: Novell Client Trust Heap Overflow Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-07-064.html
October 25, 2007

-- CVE ID:
CVE-2007-5767

-- Affected Vendor:
Novell

-- Affected Products:
BorderManager 3.8

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Novell software which utilize the Novell
Client Trust. Authentication is not required to exploit this
vulnerability.

The specific flaw exists in the Novell Client Trust application,
clntrust.exe, which listens by default on UDP port 3024 on Novell
client machines. During a validation request, the Client Trust process
copies a user-supplied Novell tree name until a wide-character
backslash or a NULL is encountered. If neither is found within the
data, the process will copy excess data which later overflows a static
buffer during a call to wsprintfA.


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

   http://download.novell.com/Download?buildid=AuOWp2Xsvmc~

-- Disclosure Timeline:
2007.07.17 - Vulnerability reported to vendor
2007.10.25 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by uvinc.

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