Novell eDirectory Core Protocol Opcode 0x24 Heap Overflow VulnerabilityZDI-08-066: October 8th, 2008
TippingPoint™ IPS Customer ProtectionTippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 6177. For further product information on the TippingPoint IPS:
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Novell eDirectory Server. Authentication is not required to exploit this vulnerability.
The specific flaw exists within dhost.exe, the service responsible for directory replication which is bound by default to TCP port 524. Improper parsing within opcode 0x24 via the Netware Core Protocol can result in an arithmetic calculation based on supplied user-input resulting in an under-allocated heap buffer. This fault can be leveraged to result in arbitrary code execution.
Vendor ResponseNovell has issued an update to correct this vulnerability. More details can be found at:
2008-05-19 - Vulnerability reported to vendor
2008-10-08 - Coordinated public release of advisory
CreditThis vulnerability was discovered by:
Sebastian Apelt (firstname.lastname@example.org)