Advisory Details

April 13th, 2010

Sun Microsystems Directory Server Enterprise DSML UTF-8 Denial of Service Vulnerability

ZDI-10-075
ZDI-CAN-609

CVE ID CVE-2010-0897
CVSS SCORE 7.8, (AV:N/AC:L/Au:N/C:N/I:N/A:C)
AFFECTED VENDORS Sun Microsystems
AFFECTED PRODUCTS Directory Server
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 9610. For further product information on the TippingPoint IPS: 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 Anonymous
BACK TO ADVISORIES