CORE SDI

                                  http://www.core-sdi.com



            Report for RealServer memory contents disclosure vulnerability



Date Published: November 16th, 2000



Advisory ID: CORE-20001116



Bugtraq ID: 1957



CVE CAN: None currently assigned.



Title: RealServer memory contents disclosure vulnerability



Class: Failure to handle exceptional conditions



Remotely Exploitable: Yes



Locally Exploitable: Yes



Release Mode: COORDINATED RELEASE



Vulnerability Description:



  A memory contents disclosure vulnerability was found on RealNetworks

  RealServer which will give out information about the server configuration,

  runtime memory data and tokens and authentication credentials.

  This information allows an external attacker to possibly obtain

  administrative access to the server or to data belonging to other user

  sessions.



Vulnerable Packages/Systems:



  Real Networks Real Server version 7 and below, all supported platforms



Solution/Vendor Information/Workaround:



  A description of the problem and an updated version of

  Real Server with a fix for the problem is available at:



  http://service.real.com/help/faq/security/memory.html



Vendor notified on: October 17th, 2000



Credits:



  This vulnerability was found by Gerardo Richarte and Claudio Castiglia

  from Core SDI S.A.



  CORE SDI would like to thank RealNetworks Inc. for their prompt

  response to the problem.



  This advisory was drafted with the help of the SecurityFocus.com

  Vulnerability Help Team. For more information or assistance drafting

  advisories please mail vulnhelp@securityfocus.com.



  Other CORE SDI advisories can be found at



   http://www.core-sdi.com/english/publications.html





Technical Description - Exploit/Concept Code:



  Issuing a request to a RealServer with the following URI:



  http://targetserver/admin/includes/   (note the ending '/' slash)



  A response will be ellicited containing random pieces of

  the server's runtime memory. This generally consists of

  data from previous sessions and contains information that

  could be used to obtain unauthorized access to the RealServer

  administration facilities (cookies sent to other clients,

  BASE64 encoded usernames and passwords, the random port  number

  where the administration server listens, etc.)



DISCLAIMER:

  The contents of this advisory are copyright (c) 2000 CORE SDI S.A.

  and may be distributed freely provided that no fee is charged for this

  distribution and proper credit is given.



$Id: RealServer-advisory.txt,v 1.9 2000/11/16 20:44:25 iarce Exp $

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 a house from a horse by the roof on the house,

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Iván Arce

Presidente

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email   : iarce@core-sdi.com

http://www.core-sdi.com

Florida 141 2do cuerpo Piso 7

C1005AAG Buenos Aires, Argentina.

Tel/Fax : +(54-11) 4331-5402

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