full-disclosure - ZDI-10-075: Sun Microsystems Directory Server Enterprise DSML UTF-8 Denial of Service Vulnerability

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Date: Tue, 13 Apr 2010 16:47:45 -0500
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-10-075: Sun Microsystems Directory Server
 Enterprise DSML UTF-8 Denial of Service Vulnerability

ZDI-10-075: Sun Microsystems Directory Server Enterprise DSML UTF-8 Denial of Service Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-075
April 13, 2010

-- CVE ID:
CVE-2010-0897

-- Affected Vendors:
Sun Microsystems

-- Affected Products:
Sun Microsystems Directory Server

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 9610. 
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 Sun Microsystems Directory Server. Authentication is
not required to exploit this vulnerability.

The specific flaw exists within Sun Directory Server's DSML-over-HTTP
implementation and can be triggered via an HTTP POST request to the
webserver that the application has bound to. When the service processes
an XML request containing specific UTF-8 characters, an underlying
library will raise an exception that is uncaught by the application. Due
to the exception being uncaught, the application will then terminate
which will cause future requests made against the service to fail. This
will lead to a denial of service against the affected application.

-- Vendor Response:
Sun Microsystems states:
http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpuapr2010.html

-- Disclosure Timeline:
2009-10-27 - Vulnerability reported to vendor
2010-04-13 - Coordinated public release of advisory

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

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