Novell eDirectory Malformed NCP Request Denial of Service VulnerabilityZDI-11-060: February 7th, 2011
TippingPoint™ IPS Customer ProtectionTippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 8275. For further product information on the TippingPoint IPS:
This vulnerability allows attackers to deny services on vulnerable installations of Novell eDirectory. Authentication is not required in order to trigger this vulnerability.
The flaw exists within Novell's eDirectory Server's NCP implementation. Novell's eDirectory Server binds to port 524 for processing NCP requests. When the application processes a malformed FileSetLock request, the service will become unresponsive resulting in an inability to authenticate to that server.
Vendor ResponseNovell has issued an update to correct this vulnerability. More details can be found at:
2009-03-26 - Vulnerability reported to vendor
2011-02-07 - Coordinated public release of advisory
CreditThis vulnerability was discovered by: