full-disclosure - ZDI-09-075: Novell eDirectory LDAP Null Base DN Denial of Service Vulnerability

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Message-ID: <EE499D69B3D0714590B6FE9762B046110381100D00@emb01.unity.local>
Date: Mon, 2 Nov 2009 17:32:00 -0600
From: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
To: "'full-disclosure@...ts.grok.org.uk'" <full-disclosure@...ts.grok.org.uk>, 
	"'bugtraq@...urityfocus.com'" <bugtraq@...urityfocus.com>
Subject: ZDI-09-075: Novell eDirectory LDAP Null Base DN
 Denial of Service Vulnerability

ZDI-09-075: Novell eDirectory LDAP Null Base DN Denial of Service Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-09-075
November 2, 2009

-- Affected Vendors:
Novell

-- Affected Products:
Novell eDirectory

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 9234. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows attackers to deny services on vulnerable
installations of Novell eDirectory. Authentication is not required in
order to exploit this vulnerability.

The specific flaw exists within Novell's eDirectory Server's LDAP
implementation. Novell eDirectory's NDSD process binds to port 389/TCP
for handling LDAP requests. When the service processes a search request
with an undefined BaseDN, it will become unresponsive resulting in an
inability to query or authenticate to that server.

-- Vendor Response:
Novell has issued an update to correct this vulnerability. More
details can be found at:

http://www.novell.com/support/viewContent.do?externalId=7004721

-- Disclosure Timeline:
2009-07-14 - Vulnerability reported to vendor
2009-11-02 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Anonymous

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents 
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

    http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
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:

    http://www.zerodayinitiative.com/advisories/disclosure_policy/
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