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Category:   Application (Generic)  >   AWStats Vendors:   awstats.sourceforge.net
(Gentoo Issues Fix) AWStats Input Validation Flaws Let Users Execute Arbitrary Commands
SecurityTracker Alert ID:  1013008
SecurityTracker URL:  http://securitytracker.com/id/1013008
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Jan 26 2005
Impact:   Execution of arbitrary code via local system, Execution of arbitrary code via network, User access via local system, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 6.3
Description:   Two security vulnerabilities were reported in AWStats. A local or remote user can execute commands on the target system.

The vendor reported that the 'awstats.pl' script does not properly validate user-supplied input in system environment variables and other inputs. A local user can supply specially crafted input to execute arbitrary Perl code with the privileges of the web service. From code review, it appears that a remote user can supply a specially crafted plug-in name to execute arbitrary commands [however, the vendor did not confirm this.]

iDEFENSE is credited with reporting one of the two security flaws.

Impact:   A local user can execute Perl commands on the target system with the privileges of the web service.

A remote user may be able to execute arbitrary commands.

Solution:   Gentoo has released a fix and indicates that all AWStats users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-www/awstats-6.3"

Vendor URL:  awstats.sourceforge.net/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Mandriva/Mandrake)

Message History:   This archive entry is a follow-up to the message listed below.
Jan 14 2005 AWStats Input Validation Flaws Let Users Execute Arbitrary Commands



 Source Message Contents

Subject:  [gentoo-announce] [ GLSA 200501-36 ] AWStats: Remote code execution



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Gentoo Linux Security Advisory                           GLSA 200501-36
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                                            http://security.gentoo.org/
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  Severity: High
     Title: AWStats: Remote code execution
      Date: January 25, 2005
      Bugs: #77963
        ID: 200501-36

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Synopsis
========

AWStats fails to validate certain input, which could lead to the remote
execution of arbitrary code.

Background
==========

AWStats is an advanced log file analyzer and statistics generator.

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

    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  net-www/awstats        < 6.3                               >= 6.3

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

When 'awstats.pl' is run as a CGI script, it fails to validate specific
inputs which are used in a Perl open() function call.

Impact
======

A remote attacker could supply AWStats malicious input, potentially
allowing the execution of arbitrary code with the rights of the web
server.

Workaround
==========

Making sure that AWStats does not run as a CGI script will avoid the
issue, but we recommend that users upgrade to the latest version, which
fixes these bugs.

Resolution
==========

All AWStats users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-www/awstats-6.3"

References
==========

  [ 1 ] AWStats ChangeLog
        http://awstats.sourceforge.net/docs/awstats_changelog.txt
  [ 2 ] iDEFENSE Advisory
        http://www.idefense.com/application/poi/display?id=185

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

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

  http://security.gentoo.org/glsa/glsa-200501-36.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 2005 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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