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AUSCERT Security Bulletin
Vulnerability discovered in Novell eDirectory
19 March 2010
AusCERT Security Bulletin Summary
Product: Novell eDirectory
Operating System: Windows
Impact/Access: Administrator Compromise -- Remote/Unauthenticated
Member content until: Sunday, April 18 2010
A security vulnerability has been reported in Novell eDirectory that
can allow attackers to take over administrator sessions.
The following details were reported by the discoverer of this
"Novell eDirectory DHOST Predictable Session Cookie
This module is able to predict the next session cookie value issued
by the DHOST web service of Novell eDirectory 8.8.5. An attacker
can run this module, wait until the real administrator logs in, then
specify the predicted cookie value to hijack their session." 
This was detailed in a metasploit module indicating that the
exploit code is now public.
At the time of this publication there was no patch available from
Novell. Until one becomes available, administrators may wish to
restrict network access to the server and monitor it for signs
of compromise. Access to administrative functions should always
be restricted to trusted networks and not be publically available.
 Novell eDirectory DHOST Predictable Session Cookie
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
If you believe that your computer system has been compromised or attacked in
any way, we encourage you to let us know by completing the secure National IT
Incident Reporting Form at:
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: firstname.lastname@example.org
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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