Advisory Details

October 8th, 2008

Novell eDirectory Core Protocol Opcode 0x0F Heap Overflow Vulnerability

ZDI-08-065
ZDI-CAN-336

CVE ID CVE-2008-4478
CVSS SCORE
AFFECTED VENDORS Novell
AFFECTED PRODUCTS eDirectory
TIPPINGPOINT™ IPS CUSTOMER PROTECTION TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 6178. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS

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 0x0F via the Netware Core Protocol can result in an arithmetic calculation based on supplied user-input resulting in an integer overflow that will be used to copy into a heap buffer. This fault can be leveraged to result in arbitrary code execution.

VENDOR RESPONSE Novell has issued an update to correct this vulnerability. More details can be found at:
TID 7001184
DISCLOSURE TIMELINE
  • 2008-05-19 - Vulnerability reported to vendor
  • 2008-10-08 - Coordinated public release of advisory
CREDIT Sebastian Apelt (webmaster@buzzworld.org)
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