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UNIRAS Brief - 329/04 - Two Gentoo Security Advisories



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 329/04 dated 28.06.04  Time: 15:35  
  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
=====

Two Gentoo Security Advisories:

1. giFT-FastTrack: remote denial of service attack.

2. gzip: Insecure creation of temporary files.


Detail
====== 

1. There is a vulnerability where a carefully crafted signal sent to the 
giFT-FastTrack plugin will cause the giFT daemon to crash.

2. gzip contain a bug potentially allowing an attacker to execute arbitrary
commands.


1
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Gentoo Linux Security Advisory                           GLSA 200406-19
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                                            http://security.gentoo.org/
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  Severity: Low
     Title: giFT-FastTrack: remote denial of service attack
      Date: June 24, 2004
      Bugs: #54452
        ID: 200406-19

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Synopsis
========

There is a vulnerability where a carefully crafted signal sent to the 
giFT-FastTrack plugin will cause the giFT daemon to crash.

Background
==========

giFT-FastTrack is a plugin for the giFT file-sharing application. It 
allows giFT users to connect to the fasttrack network to share files.

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

    -------------------------------------------------------------------
     Package                 /   Vulnerable   /             Unaffected
    -------------------------------------------------------------------
  1  net-p2p/gift-fasttrack       <= 0.8.6                    >= 0.8.7

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

Alan Fitton found a vulnerability in the giFT-FastTrack plugin in version
0.8.6 and earlier. It can be used to remotely crash the giFT daemon.

Impact
======

Attackers may use this vulnerability to perform a Denial of Service attack 
against the giFT daemon. There is no risk of code execution.

Workaround
==========

There is no known workaround at this time. All users are encouraged to 
upgrade to the latest available version.

Resolution
==========

All users should upgrade to the latest available version of
gift-fasttrack:

    # emerge sync

    # emerge -pv ">=net-p2p/gift-fasttrack-0.8.7"
    # emerge ">=net-p2p/gift-fasttrack-0.8.7"

References
==========

  [ 1 ] giFT-FastTrack announcement
        http://gift-fasttrack.berlios.de/

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

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

     http://security.gentoo.org/glsa/glsa-200406-19.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@xxxxxxxxxx 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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2.
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Gentoo Linux Security Advisory                           GLSA 200406-18
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: gzip: Insecure creation of temporary files
      Date: June 24, 2004
      Bugs: #54890
        ID: 200406-18

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Synopsis
========

gzip contain a bug potentially allowing an attacker to execute arbitrary commands.

Background
==========

gzip (GNU zip) is popular compression program. The included gzexe utility allows 
you to compress executables in place and have them automatically uncompress and 
execute when you run them.

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

    -------------------------------------------------------------------
     Package        /   Vulnerable   /                      Unaffected
    -------------------------------------------------------------------
  1  app-arch/gzip      <= 1.3.3-r3                        >= 1.3.3-r4

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

The script gzexe included with gzip contains a bug in the code that handles tempfile
creation. If the creation of a temp file fails when using gzexe fails instead of 
bailing out it executes the command given as argument.

Impact
======

This could lead to priviege escalation by running commands under the rights of the 
user running the self extracting file.

Workaround
==========

There is no known workaround at this time. All users are encouraged to upgrade to
the latest available version.

Resolution
==========

All gzip users should upgrade to the latest stable version:

    # emerge sync

    # emerge -pv ">=app-arch/gzip-1.3.3-r4"
    # emerge ">=app-arch/gzip-1.3.3-r4"

Additionally, once the upgrade is complete, all self extracting files created with
earlier versions gzexe should be recreated, since the vulnerability is actually 
embedded in those executables.

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

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

     http://security.gentoo.org/glsa/glsa-200406-18.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 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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For additional information or assistance, please contact the HELP Desk by 
telephone or Not Protectively Marked information may be sent via 
EMail to: uniras@xxxxxxxxxxxx

Office Hours:
Mon - Fri: 08:30 - 17:00 Hrs
Tel: +44 (0) 20 7821 1330 Ext 4511
Fax: +44 (0) 20 7821 1686

Outside of Office Hours:
On Call Duty Officer:
Tel: +44 (0) 20 7821 1330 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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