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Category:   Application (Generic)  >   LinPopUp Vendors:   Jacquet, Jean-Marc
(Gentoo Issues Fix) LinPopUp Buffer Overflow in strexpand() Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1012784
SecurityTracker URL:  http://securitytracker.com/id/1012784
CVE Reference:   CVE-2004-1282   (Links to External Site)
Date:  Jan 6 2005
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.2.0
Description:   A vulnerability was reported in LinPopUp. A remote user can cause arbitrary code to be executed by the target user.

D. J. Bernstein reported that a remote user can send a specially crafted message to LinPopUp to trigger a buffer overflow in strexpand() in 'string.c' and execute arbitrary code. The code will run with the privileges of the LinPopUp process.

Stephen Dranger is credited with discovering this flaw.

Impact:   A remote user can execute arbitrary code on the target system with the privileges of the LinPopUp process.
Solution:   Gentoo has released a fix and indicates that all LinPopUp users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-im/linpopup-2.0.4-r1"

Vendor URL:  www.littleigloo.org/downloads_002.php3 (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Gentoo)

Message History:   This archive entry is a follow-up to the message listed below.
Dec 16 2004 LinPopUp Buffer Overflow in strexpand() Lets Remote Users Execute Arbitrary Code



 Source Message Contents

Subject:  [gentoo-announce] [ GLSA 200501-01 ] LinPopUp: Buffer overflow in message reply


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Gentoo Linux Security Advisory                           GLSA 200501-01
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: LinPopUp: Buffer overflow in message reply
      Date: January 04, 2005
      Bugs: #74705
        ID: 200501-01

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Synopsis
========

LinPopUp contains a buffer overflow potentially allowing execution of
arbitrary code.

Background
==========

LinPopUp is a graphical application that acts as a frontend to Samba
client messaging functions, allowing a Linux desktop to communicate
with a Microsoft Windows computer that runs Winpopup.

Affected packages
=================

    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  net-im/linpopup     < 2.0.4-r1                        >= 2.0.4-r1

Description
===========

Stephen Dranger discovered that LinPopUp contains a buffer overflow in
string.c, triggered when replying to a remote user message.

Impact
======

A remote attacker could craft a malicious message that, when replied
using LinPopUp, would exploit the buffer overflow. This would result in
the execution of arbitrary code with the privileges of the user running
LinPopUp.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All LinPopUp users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-im/linpopup-2.0.4-r1"

References
==========

  [ 1 ] CAN-2004-1282
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1282
  [ 2 ] Stephen Dranger Advisory
        http://tigger.uic.edu/~jlongs2/holes/linpopup.txt

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200501-01.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2004 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.0


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