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Category:   Application (Generic)  >   Novell iManager Vendors:   Novell
Novell iManager TREE Parameter NULL Pointer Dereference Lets Remote Users Deny Service
SecurityTracker Alert ID:  1017139
SecurityTracker URL:
CVE Reference:   CVE-2006-4517   (Links to External Site)
Date:  Nov 1 2006
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.5
Description:   A vulnerability was reported in Novell iManager. A remote user can cause denial of service conditions.

A remote user can send an HTTP POST request with a specially crafted TREE parameter to trigger a NULL pointer dereference and cause the Tomact server to crash. A string of more than 256 bytes can trigger the flaw.

The vendor was notified on August 17, 2006.

CIRT.DK discovered this vulnerability. iDefense reported this vulnerability.

Impact:   A remote user can cause denial of service conditions.
Solution:   The vendor has issued a fixed version (2.6).
Vendor URL: (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Red Hat Enterprise), Linux (SuSE), UNIX (HP/UX), UNIX (Solaris - SunOS), Windows (2000), Windows (2003), Windows (XP)

Message History:   None.

 Source Message Contents

Subject:  iDefense Security Advisory 10.31.06: Novell iManager Tomcat DoS

Novell iManager Tomcat DoS Vulnerability

iDefense Security Advisory 10.31.06
Oct 31, 2006


iManager is a management portal for Novell's eDirectory server. More
information about iManager is available at the link shown.


Remote exploitation of a DoS vulnerability in Novell Inc.'s iManager
could allow attackers to crash the iManager Tomcat server.

The vulnerability specifically exists due to improper handling of a an
HTTP POST request with a long TREE parameter. When such a request is
received, a NULL pointer dereference occurs, leading to a crash of the
service. iDefense Labs testing has indicated that any string longer than
256 bytes will be effective.


Exploitation requires that an attacker send a specially constructed HTTP
request to the server. This crashes the server, making it unusable until
it is restarted.


iDefense has confirmed this vulnerability in Novell iManager 2.5. All
previous versions are suspected vulnerable.


iDefense is currently unaware of any workarounds for this issue.


Novell has addressed this vulnerability within iManager version 2.6.
Upgrading to this version will alleviate exposure to the vulnerability.


The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2006-4517 to this issue. This is a candidate for inclusion in
the CVE list (, which standardizes names for
security problems.


08/17/2006  Initial vendor notification
08/18/2006  Initial vendor response
10/06/2006  Second vendor notification
10/31/2006  Coordinated public disclosure


This vulnerability was reported to iDefense by CIRT.DK.

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