TippingPoint Zero Day Initiative

Novell eDirectory dhost.exe Content-Length Header Heap Overflow Vulnerability

ZDI-08-063: October 8th, 2008


Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 3710. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows attackers to execute arbitrary code on vulnerable installations of Novell eDirectory. Authentication is not required to exploit this vulnerability.

The specific flaw resides in the web console running on TCP ports 8028 and 8030. The server exposes a web interface and accepts SOAP connections. While parsing the Content-Length header within a SOAP request an integer overflow can occur. This integer overflow triggers a subsequent overflow during a memory copy operation leading to arbitrary code execution under the context of the SYSTEM user.

Vendor Response

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

Disclosure Timeline

    2008-04-08 - Vulnerability reported to vendor
    2008-10-08 - Coordinated public release of advisory


This vulnerability was discovered by: