SecurityTracker.com
Keep Track of the Latest Vulnerabilities
with SecurityTracker!
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 
Sign Up
Sign Up for Your FREE Weekly SecurityTracker E-mail Alert Summary
Instant Alerts
Buy our Premium Vulnerability Notification Service to receive customized, instant alerts
Affiliates
Put SecurityTracker Vulnerability Alerts on Your Web Site -- It's Free!
Partners
Become a Partner and License Our Database or Notification Service
Report a Bug
Report a vulnerability that you have found to SecurityTracker
bugs
@
securitytracker.com






Category:   Application (Generic)  >   rdesktop Vendors:   rdesktop.org
rdesktop Buffer Overflow in process_redirect_pdu() Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1019991
SecurityTracker URL:  http://securitytracker.com/id/1019991
CVE Reference:   CVE-2008-1802   (Links to External Site)
Date:  May 8 2008
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.5.0
Description:   A vulnerability was reported in rdesktop. A remote user can execute arbitrary code on the target system.

A remote RDP server can send a specially crafted RDP redirect request to the connected target user to trigger a buffer overflow and execute arbitrary code on the target user's system. The code will run with the privileges of the target user.

The vulnerability resides in the process_redirect_pdu() function in 'rdp.c'.

The vendor was notified on November 12, 2007.

An anonymous researcher reported this vulnerability via iDefense.

Impact:   A remote server can execute arbitrary code on the connected target user's system.
Solution:   The vendor has issued a source code fix, available at:

http://rdesktop.cvs.sourceforge.net/rdesktop/rdesktop/rdp.c?annotate=1.102&pathrev=HEAD#l1337

Vendor URL:  www.rdesktop.org/ (Links to External Site)
Cause:   Boundary error
Underlying OS:   Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Aug 19 2008 (Sun Issues Advisory) rdesktop Buffer Overflow in process_redirect_pdu() Lets Remote Users Execute Arbitrary Code
Sun is working on a fix for OpenSolaris.



 Source Message Contents

Date:  Wed, 07 May 2008 19:37:30 -0400
Subject:  iDefense Security Advisory 05.07.08: Multiple Vendor rdesktop


iDefense Security Advisory 05.07.08
http://labs.idefense.com/intelligence/vulnerabilities/
May 07, 2008

I. BACKGROUND

rdesktop is an open source client that speaks the Remote Desktop
Protocol (RDP). This allows Unix-based users to login to Windows
Terminal Servers. More information is available at the following URL.

http://www.rdesktop.org/

II. DESCRIPTION

Remote exploitation of a BSS overflow vulnerability in rdesktop, as
included in various vendors' operating system distributions, allows
attackers to execute arbitrary code with the privileges of the
logged-in user.

The vulnerability exists within the code responsible for reading in an
RDP redirect request. This request is used to redirect an RDP
connection from one server to another. When parsing the redirect
request, the rdesktop client reads several 32-bit integers from the
request packet. These integers are then used to control the number of
bytes read into statically allocated buffers. This results in several
buffers located in the BSS section being overflowed, which can lead to
the execution of arbitrary code.

III. ANALYSIS

Exploitation of this vulnerability results in the execution of arbitrary
code with the privileges of the logged in user. In order to exploit this
vulnerability, an attacker must persuade a targeted user to connect to a
malicious RDP server.

IV. DETECTION

iDefense confirmed the existence of this vulnerability in rdesktop
version 1.5.0. Previous versions may also be affected.

V. WORKAROUND

iDefense is currently unaware of any effective workaround for this
issue.

VI. VENDOR RESPONSE

The rdesktop maintainer has addressed this vulnerability with CVS
revision 1.102 of rdp.c. For more information, visit the following URL.

http://rdesktop.cvs.sourceforge.net/rdesktop/rdesktop/rdp.c?annotate=1.102&pathrev=HEAD#l1337

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2008-1802 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems.

VIII. DISCLOSURE TIMELINE

11/12/2007  Initial vendor notification
11/19/2007  Initial vendor response
05/07/2008  Public disclosure

IX. CREDIT

The discoverer of this vulnerability wishes to remain anonymous.

Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events
http://labs.idefense.com/

X. LEGAL NOTICES

Copyright  2008 iDefense, Inc.

Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDefense. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically,
please e-mail customerservice@idefense.com for permission.

Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
 There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct,
indirect, or consequential loss or damage arising from use of, or
reliance on, this information.
_______________________________________________
To unsubscribe, go here:
http://www.idefense.com/mailman/listinfo/idlabs-advisories


 
 


Go to the Top of This SecurityTracker Archive Page





Home   |    View Topics   |    Search   |    Contact Us

Copyright 2014, SecurityGlobal.net LLC