TippingPoint Zero Day Initiative
 

Novell eDirectory NDS Server Host Header Buffer Overflow Vulnerability

ZDI-06-035: October 26th, 2006

CVE ID

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 4519. For further product information on the TippingPoint IPS:

Vulnerability Details

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

The specific flaw exists within the httpstk.dll library within the dhost.exe web interface of the eDirectory Host Environment. The web interface does not validate the length of the HTTP Host header prior to using the value of that header in an HTTP redirect. This results in an exploitable stack-based buffer overflow.

Vendor Response

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

Disclosure Timeline

    2006-08-14 - Vulnerability reported to vendor
    2006-10-26 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Manuel Santamarina Suarez