what you don't know can hurt you

core-sdi.realserver

core-sdi.realserver
Posted Nov 17, 2000
Authored by Ivan Arce | Site core-sdi.com

Core-SDI Advisory CORE-20001116 - 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. Fix available here.

MD5 | a6bd97b1edf9644d0bc712d42721b1f7

core-sdi.realserver

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                                              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 $
---

"Understanding. A cerebral secretion that enables one having it to know
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


==================[ CORE Seguridad de la Informacion S.A. ]=========
Iván Arce
Presidente
PGP Fingerprint: C7A8 ED85 8D7B 9ADC 6836 B25D 207B E78E 2AD1 F65A
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
=====================================================================





--- For a personal reply use iarce@core-sdi.com

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