ZDI-08-064: Novell eDirectory dhost.exe Accept Language Header Heap Overflow Vulnerability Oct 08 2008 09:32PM
zdi-disclosures 3com com
ZDI-08-064: Novell eDirectory dhost.exe Accept Language Header Heap

Overflow Vulnerability


October 8, 2008

-- CVE ID:


-- Affected Vendors:


-- Affected Products:

Novell eDirectory

-- TippingPoint(TM) IPS Customer Protection:

TippingPoint IPS customers have been protected against this

vulnerability by Digital Vaccine protection filter ID 6084.

For further product information on the TippingPoint IPS, visit:


-- 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. The service copies the contents of the Accept-Language

header within a SOAP request into a fixed-length buffer without any

bounds checking. If an attacker sends a specially crafted request it

will trigger an 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

-- Credit:

This vulnerability was discovered by:

* Anonymous

-- About the Zero Day Initiative (ZDI):

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disclosing discovered vulnerabilities.

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through the ZDI can find more information and sign-up at:


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used. TippingPoint does not re-sell the vulnerability details or any

exploit code. Instead, upon notifying the affected product vendor,

TippingPoint provides its customers with zero day protection through

its intrusion prevention technology. Explicit details regarding the

specifics of the vulnerability are not exposed to any parties until

an official vendor patch is publicly available. Furthermore, with the

altruistic aim of helping to secure a broader user base, TippingPoint

provides this vulnerability information confidentially to security

vendors (including competitors) who have a vulnerability protection or

mitigation product.

Our vulnerability disclosure policy is available online at:


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