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Category:   Application (Generic)  >   LCDproc Vendors:   lcdproc.org
(Gentoo Issues Fix) LCDproc Format String and Buffer Overflows Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1009953
SecurityTracker URL:  http://securitytracker.com/id/1009953
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Apr 27 2004
Impact:   Denial of service via network, Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 0.4.1 and prior versions
Description:   Several vulnerabilities were reported in LCDproc. A remote user can execute arbitrary code on the target system.

Adriano Lima of Priv8 Security Research reported that the code contains buffer overflow and format string vulnerabilities.

The parse_all_client_messages() function in 'parse.c' reportedly contains a buffer overflow in the processing of long arguments.

The test_func_func() function in 'client_functions.c' reportedly contains a buffer overflow in processing long arguments to the test_func command. A format string flaw is also reported in the same function.

Some demonstration exploit code is available at:

http://www.priv8security.com/releases/priv8lcd44.pl

[Editor's note: At the time of this entry, the exploit code was not available.]

The original advisory is available at:

http://www.priv8security.com/releases/lcdproc/lcdproc.adv2

Impact:   A remote user can execute arbitrary code on the target system with the privileges of the target LCDproc daemon.
Solution:   Gentoo has released a fix and indicates that LCDproc users should upgrade to version 0.4.5 or later:

# emerge sync

# emerge -pv ">=app-misc/lcdproc-0.4.5"
# emerge ">=app-misc/lcdproc-0.4.5"

Vendor URL:  lcdproc.org/ (Links to External Site)
Cause:   Boundary error, Input validation error, State error
Underlying OS:  Linux (Gentoo)

Message History:   This archive entry is a follow-up to the message listed below.
Apr 8 2004 LCDproc Format String and Buffer Overflows Let Remote Users Execute Arbitrary Code



 Source Message Contents

Subject:  [gentoo-announce] [ GLSA 200404-19 ] Buffer overflows and format string


vulnerabilities in LCDproc
Date: Mon, 26 Apr 2004 22:19:53 -0700
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Gentoo Linux Security Advisory                           GLSA 200404-19
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Buffer overflows and format string vulnerabilities in
            LCDproc
      Date: April 27, 2004
      Bugs: #47340
        ID: 200404-19

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Synopsis
========

Multiple remote vulnerabilities have been found in the LCDd server,
allowing execution of arbitrary code with the rights of the LCDd user.

Background
==========

LCDproc is a program that displays various bits of real-time system
information on an LCD. It makes use of a local server (LCDd) to collect
information to display on the LCD.

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

    -------------------------------------------------------------------
     Package           /    Vulnerable    /                  Unaffected
    -------------------------------------------------------------------
  1  app-misc/lcdproc       <= 0.4.4-r1                        >= 0.4.5

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

Due to insufficient checking of client-supplied data, the LCDd server
is susceptible to two buffer overflows and one string buffer
vulnerability. If the server is configured to listen on all network
interfaces (see the Bind parameter in LCDproc configuration), these
vulnerabilities can be triggered remotely.

Impact
======

These vulnerabilities allow an attacker to execute code with the rights
of the user running the LCDproc server. By default, this is the
"nobody" user.

Workaround
==========

A workaround is not currently known for this issue. All users are
advised to upgrade to the latest version of the affected package.

Resolution
==========

LCDproc users should upgrade to version 0.4.5 or later:

    # emerge sync

    # emerge -pv ">=app-misc/lcdproc-0.4.5"
    # emerge ">=app-misc/lcdproc-0.4.5"

References
==========

  [ 1 ] LCDproc advisory
        http://lists.omnipotent.net/pipermail/lcdproc/2004-April/008884.html

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

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

     http://security.gentoo.org/glsa/glsa-200404-19.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 Technologies, 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/1.0

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