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UNIRAS Brief - 636/05 - Gentoo - Two Security Advisories



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 636/05 dated 16.08.05  Time: 11:15  
  UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
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  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
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Title
=====

Gentoo - Two Security Advisories:
     1.  AWStats: Arbitrary code execution using malicious Referrer information  [GLSA 200508-07] 
     2.  Xpdf, Kpdf, Gpdf: Denial of Service vulnerability  [GLSA 200508-08]


Detail
====== 

Security advisory summaries:

     1.  AWStats fails to validate certain log input, which could lead to the
         execution of arbitrary Perl code during the generation of the
         statistics.

     2.  Xpdf, Kpdf and Gpdf may crash as a result of a Denial of Service
         vulnerability.


Security advisory content follows:


1.


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Gentoo Linux Security Advisory                           GLSA 200508-07
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                                            http://security.gentoo.org/
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  Severity: High
     Title: AWStats: Arbitrary code execution using malicious Referrer
            information
      Date: August 16, 2005
      Bugs: #102145
        ID: 200508-07

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Synopsis
========

AWStats fails to validate certain log input, which could lead to the
execution of arbitrary Perl code during the generation of the
statistics.

Background
==========

AWStats is an advanced log file analyzer and statistics generator. In
HTTP reports it parses Referrer information in order to display the
most common Referrer values that caused users to visit the website.

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

    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  net-www/awstats        < 6.5                               >= 6.5

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

When using a URLPlugin, AWStats fails to sanitize Referrer URL data
before using them in a Perl eval() routine.

Impact
======

A remote attacker can include arbitrary Referrer information in a HTTP
request to a web server, therefore injecting tainted data in the log
files. When AWStats is run on this log file, this can result in the
execution of arbitrary Perl code with the rights of the user running
AWStats.

Workaround
==========

Disable all URLPlugins in the AWStats configuration.

Resolution
==========

All AWStats users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-www/awstats-6.5"

Note: Users with the vhosts USE flag set should manually use
webapp-config to finalize the update.

References
==========

  [ 1 ] CAN-2005-1527
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1527
  [ 2 ] iDEFENSE Advisory
        http://www.idefense.com/application/poi/display?id=290&type=vulnerabilities

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

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

  http://security.gentoo.org/glsa/glsa-200508-07.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@xxxxxxxxxx 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




2.


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Gentoo Linux Security Advisory                           GLSA 200508-08
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Xpdf, Kpdf, GPdf: Denial of Service vulnerability
      Date: August 16, 2005
      Bugs: #99769, #100263, #100265
        ID: 200508-08

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Synopsis
========

Xpdf, Kpdf and GPdf may crash as a result of a Denial of Service
vulnerability.

Background
==========

Xpdf, Kpdf and GPdf are PDF file viewers that run under the X Window
System. Kpdf and GPdf both contain Xpdf code. Kpdf is also part of
kdegraphics.

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

    -------------------------------------------------------------------
     Package               /   Vulnerable   /               Unaffected
    -------------------------------------------------------------------
  1  app-text/xpdf             < 3.00-r10                  >= 3.00-r10
  2  kde-base/kdegraphics      < 3.3.2-r3                  >= 3.3.2-r3
  3  kde-base/kpdf             < 3.4.1-r1                  >= 3.4.1-r1
  4  app-text/gpdf             < 2.10.0-r1                >= 2.10.0-r1
    -------------------------------------------------------------------
     4 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

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

Xpdf, Kpdf and GPdf do not handle a broken table of embedded TrueType
fonts correctly. After detecting such a table, Xpdf, Kpdf and GPdf
attempt to reconstruct the information in it by decoding the PDF file,
which causes the generation of a huge temporary file.

Impact
======

A remote attacker may cause a Denial of Service by creating a specially
crafted PDF file, sending it to a CUPS printing system (which uses
Xpdf), or by enticing a user to open it in Xpdf, Kpdf, or GPdf.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Xpdf users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-text/xpdf-3.00-r10"

All GPdf users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-text/gpdf-2.10.0-r1"

All Kpdf users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=kde-base/kdegraphics-3.3.2-r3"

All KDE Split Ebuild Kpdf users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=kde-base/kpdf-3.4.1-r1"

References
==========

  [ 1 ] CAN-2005-2097
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2097

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

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

  http://security.gentoo.org/glsa/glsa-200508-08.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@xxxxxxxxxx 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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For additional information or assistance, please contact the HELP Desk by 
telephone or Not Protectively Marked information may be sent via 
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Tel: +44 (0) 870 487 0748 and follow the prompts

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UNIRAS wishes to acknowledge the contributions of Gentoo for the information 
contained in this Briefing. 
- ----------------------------------------------------------------------------------
This Briefing contains the information released by the original author. Some 
of the information may have changed since it was released. If the vulnerability 
affects you, it may be prudent to retrieve the advisory from the canonical site 
to ensure that you receive the most current information concerning that problem.

Reference to any specific commercial product, process, or service by trade 
name, trademark manufacturer, or otherwise, does not constitute or imply 
its endorsement, recommendation, or favouring by UNIRAS or NISCC.  The views 
and opinions of authors expressed within this notice shall not be used for 
advertising or product endorsement purposes.

Neither UNIRAS or NISCC shall also accept responsibility for any errors 
or omissions contained within this briefing notice. In particular, they shall 
not be liable for any loss or damage whatsoever, arising from or in connection 
with the usage of information contained within this notice.

UNIRAS is a member of the Forum of Incident Response and Security Teams (FIRST) 
and has contacts with other international Incident Response Teams (IRTs) in 
order to foster cooperation and coordination in incident prevention, to prompt 
rapid reaction to incidents, and to promote information sharing amongst its 
members and the community at large. 
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<End of UNIRAS Briefing>

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