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UNIRAS Brief - 508/05 - Gentoo - Three Security Advisories



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 508/05 dated 07.07.05  Time: 13:25  
  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 - Three Security Advisories:
     1.  RealPlayer: Heap overflow vulnerability
     2.  zlib: Buffer overflow
     3.  TikiWiki: Arbitrary command execution through XML-RPC


Detail
====== 

Security advisory summaries:

     1.  RealPlayer is vulnerable to a heap overflow that could lead to remote
         execution of arbitrary code.

     2.  A buffer overflow has been discovered in zlib, potentially resulting in
         the execution of arbitrary code.

     3.  TikiWiki includes PHP XML-RPC code, making it vulnerable to arbitrary
         command execution.


Security advisory content follows:


1.


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Gentoo Linux Security Advisory                           GLSA 200507-04
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: RealPlayer: Heap overflow vulnerability
      Date: July 06, 2005
      Bugs: #96923
        ID: 200507-04

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Synopsis
========

RealPlayer is vulnerable to a heap overflow that could lead to remote
execution of arbitrary code.

Background
==========

RealPlayer is a multimedia player capable of handling multiple
multimedia file formats.

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

    -------------------------------------------------------------------
     Package                 /  Vulnerable  /               Unaffected
    -------------------------------------------------------------------
  1  media-video/realplayer      < 10.0.5                    >= 10.0.5

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

RealPlayer is vulnerable to a heap overflow when opening RealMedia
files which make use of RealText.

Impact
======

By enticing a user to play a specially crafted RealMedia file an
attacker could execute arbitrary code with the permissions of the user
running the application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All RealPlayer users should upgrade to the latest available version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-video/realplayer-10.0.5"

References
==========

  [ 1 ] RealNetworks Security Advisory
        http://service.real.com/help/faq/security/050623_player/EN/
  [ 2 ] CAN-2005-1766
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1766

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

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

  http://security.gentoo.org/glsa/glsa-200507-04.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 200507-05
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                                            http://security.gentoo.org/
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  Severity: High
     Title: zlib: Buffer overflow
      Date: July 06, 2005
      Bugs: #98121
        ID: 200507-05

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Synopsis
========

A buffer overflow has been discovered in zlib, potentially resulting in
the execution of arbitrary code.

Background
==========

zlib is a widely used free and patent unencumbered data compression
library.

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

    -------------------------------------------------------------------
     Package        /  Vulnerable  /                        Unaffected
    -------------------------------------------------------------------
  1  sys-libs/zlib     < 1.2.2-r1                          >= 1.2.2-r1

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

Tavis Ormandy of the Gentoo Linux Security Audit Team discovered a
buffer overflow in zlib. A bounds checking operation failed to take
invalid data into account, allowing a specifically malformed deflate
data stream to overrun a buffer.

Impact
======

An attacker could construct a malformed data stream, embedding it
within network communication or an application file format, potentially
resulting in the execution of arbitrary code when decoded by the
application using the zlib library.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All zlib users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-libs/zlib-1.2.2-r1"

References
==========

  [ 1 ] CAN-2005-2096
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2096

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

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

  http://security.gentoo.org/glsa/glsa-200507-05.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



3.



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Gentoo Linux Security Advisory                           GLSA 200507-06
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                                            http://security.gentoo.org/
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  Severity: High
     Title: TikiWiki: Arbitrary command execution through XML-RPC
      Date: July 06, 2005
      Bugs: #97648
        ID: 200507-06

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Synopsis
========

TikiWiki includes PHP XML-RPC code, making it vulnerable to arbitrary
command execution.

Background
==========

TikiWiki is a web-based groupware and content management system (CMS),
using PHP, ADOdb and Smarty. TikiWiki includes vulnerable PHP XML-RPC
code.

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

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  www-apps/tikiwiki     < 1.8.5-r1                      >= 1.8.5-r1

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

TikiWiki is vulnerable to arbitrary command execution as described in
GLSA 200507-01.

Impact
======

A remote attacker could exploit this vulnerability to execute arbitrary
PHP code by sending specially crafted XML data.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All TikiWiki users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-apps/tikiwiki-1.8.5-r1"

References
==========

  [ 1 ] GLSA 200507-01
        http://security.gentoo.org/glsa/glsa-200507-01.xml
  [ 2 ] CAN-2005-1921
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1921

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

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

  http://security.gentoo.org/glsa/glsa-200507-06.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 
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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. 
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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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