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 [email protected].

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,
It's nature and laws have been exhaustively expounded by Locke,
who rode a house, and Kant, who lived in a horse." - Ambrose Bierce

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Ivбn Arce
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email : [email protected]
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