Sun Microsystems Directory Server DSML-over-HTTP Username Search Denial of Service Vulnerability

April 13th, 2010
ZDI-10-073 ZDI-CAN-594

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

Vulnerability Details

This vulnerability allows attackers to deny services on vulnerable installations of Sun Microsystems Directory Service Manager. 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 a search request with a malformed username, the application will dereference a null pointer causing any future queries made against the webserver to fail. This will lead to a denial of service against the affected service.

Additional Details

Sun Microsystems has issued an update to correct this vulnerability. More details can be found at:
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

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