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UNIRAS Brief - 448/05 - Gentoo - Five Security Advisories



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 448/05 dated 13.06.05  Time: 15:48  
  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 - Five Security Advisories:
     1.  Ettercap: Format string vulnerability                     [GLSA 200506-07]
     2.  GNU shtool, ocaml-mysql: Insecure temporary file creation [GLSA 200506-08]
     3.  gedit: Format string vulnerability                        [GLSA 200506-09]
     4.  LutelWall: Insecure temporary file creation               [GLSA 200506-10]
     5.  Gaim: Denial of Service vulnerabilities                   [GLSA 200506-11]


Detail
====== 

Security Advisory summaries:

     1.  A format string vulnerability in Ettercap could allow a remote attacker
         to execute arbitrary code.

     2.  GNU shtool and ocaml-mysql are vulnerable to symlink attacks,
         potentially allowing a local user to overwrite arbitrary files.

     3.  gedit suffers from a format string vulnerability that could allow
         arbitrary code execution.

     4.  LutelWall is vulnerable to symlink attacks, potentially allowing a
         local user to overwrite arbitrary files.

     5.  Gaim contains two remote Denial of Service vulnerabilities.


Security Advisory content follows:


1.


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Gentoo Linux Security Advisory                           GLSA 200506-07
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                                            http://security.gentoo.org/
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  Severity: High
     Title: Ettercap: Format string vulnerability
      Date: June 11, 2005
      Bugs: #94474
        ID: 200506-07

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Synopsis
========

A format string vulnerability in Ettercap could allow a remote attacker
to execute arbitrary code.

Background
==========

Ettercap is a suite of tools for content filtering, sniffing and man in
the middle attacks on a LAN.

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

    -------------------------------------------------------------------
     Package                /  Vulnerable  /                Unaffected
    -------------------------------------------------------------------
  1  net-analyzer/ettercap       < 0.7.3                      >= 0.7.3

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

The curses_msg function of Ettercap's Ncurses-based user interface
insecurely implements formatted printing.

Impact
======

A remote attacker could craft a malicious network flow that would
result in executing arbitrary code with the rights of the user running
the Ettercap tool, which is often root.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Ettercap users should upgrade to the latest available version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-analyzer/ettercap-0.7.3"

References
==========

  [ 1 ] CAN-2005-1796
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1796

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

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

  http://security.gentoo.org/glsa/glsa-200506-07.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 200506-08
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: GNU shtool, ocaml-mysql: Insecure temporary file creation
      Date: June 11, 2005
      Bugs: #93782, #93784
        ID: 200506-08

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Synopsis
========

GNU shtool and ocaml-mysql are vulnerable to symlink attacks,
potentially allowing a local user to overwrite arbitrary files.

Background
==========

GNU shtool is a compilation of small shell scripts into a single shell
tool. The ocaml-mysql package includes the GNU shtool code.

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

    -------------------------------------------------------------------
     Package             /  Vulnerable  /                   Unaffected
    -------------------------------------------------------------------
  1  dev-util/shtool        < 2.0.1-r2                     >= 2.0.1-r2
  2  dev-ml/ocaml-mysql     < 1.0.3-r1                     >= 1.0.3-r1
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

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

Eric Romang has discovered that GNU shtool insecurely creates temporary
files with predictable filenames (CAN-2005-1751). On closer inspection,
Gentoo Security discovered that the shtool temporary file, once
created, was being reused insecurely (CAN-2005-1759).

Impact
======

A local attacker could create symbolic links in the temporary files
directory, pointing to a valid file somewhere on the filesystem. When a
GNU shtool script is executed, this would result in the file being
overwritten with the rights of the user running the script, which could
be the root user.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All GNU shtool users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-util/shtool-2.0.1-r2"

All ocaml-mysql users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-ml/ocaml-mysql-1.0.3-r1"

References
==========

  [ 1 ] CAN-2005-1751
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1751
  [ 2 ] CAN-2005-1759
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1759

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

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

  http://security.gentoo.org/glsa/glsa-200506-08.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




3.




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Gentoo Linux Security Advisory                           GLSA 200506-09
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: gedit: Format string vulnerability
      Date: June 11, 2005
      Bugs: #93352
        ID: 200506-09

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Synopsis
========

gedit suffers from a format string vulnerability that could allow
arbitrary code execution.

Background
==========

gedit is the official text editor of the GNOME desktop environement.

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

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  app-editors/gedit      < 2.10.3                         >= 2.10.3

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

A format string vulnerability exists when opening files with names
containing format specifiers.

Impact
======

A specially crafted file with format specifiers in the filename can
cause arbitrary code execution.

Workaround
==========

There are no known workarounds at this time.

Resolution
==========

All gedit users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-editors/gedit-2.10.3"

References
==========

  [ 1 ] BugTraq ID 13699
        http://www.securityfocus.com/bid/13699
  [ 2 ] gedit 10.3 Release Notes

http://mail.gnome.org/archives/gnome-announce-list/2005-June/msg00006.html

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

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

  http://security.gentoo.org/glsa/glsa-200506-09.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




4.




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Gentoo Linux Security Advisory                           GLSA 200506-10
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: LutelWall: Insecure temporary file creation
      Date: June 11, 2005
      Bugs: #95378
        ID: 200506-10

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Synopsis
========

LutelWall is vulnerable to symlink attacks, potentially allowing a
local user to overwrite arbitrary files.

Background
==========

LutelWall is a high-level Linux firewall configuration tool.

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

    -------------------------------------------------------------------
     Package                 /  Vulnerable  /               Unaffected
    -------------------------------------------------------------------
  1  net-firewall/lutelwall       < 0.98                       >= 0.98

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

Eric Romang has discovered that the new_version_check() function in
LutelWall insecurely creates a temporary file when updating to a new
version.

Impact
======

A local attacker could create symbolic links in the temporary file
directory, pointing to a valid file somewhere on the filesystem. When
the update script is executed (usually by the root user), this would
result in the file being overwritten with the rights of this user.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All LutelWall users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-firewall/lutelwall-0.98"

References
==========

  [ 1 ] CAN-2005-1879
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1879

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

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

  http://security.gentoo.org/glsa/glsa-200506-10.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




5.




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Gentoo Linux Security Advisory                           GLSA 200506-11
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Gaim: Denial of Service vulnerabilities
      Date: June 12, 2005
      Bugs: #95347
        ID: 200506-11

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Synopsis
========

Gaim contains two remote Denial of Service vulnerabilities.

Background
==========

Gaim is a full featured instant messaging client which handles a
variety of instant messaging protocols.

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

    -------------------------------------------------------------------
     Package      /  Vulnerable  /                          Unaffected
    -------------------------------------------------------------------
  1  net-im/gaim       < 1.3.1                                >= 1.3.1

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

Jacopo Ottaviani discovered a vulnerability in the Yahoo! file transfer
code when being offered files with names containing non-ASCII
characters (CAN-2005-1269).

Hugo de Bokkenrijder discovered a vulnerability when receiving
malformed MSN messages (CAN-2005-1934).

Impact
======

Both vulnerabilities cause Gaim to crash, resulting in a Denial of
Service.

Workaround
==========

There are no known workarounds at this time.

Resolution
==========

All Gaim users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-im/gaim-1.3.1"

References
==========

  [ 1 ] Gaim Vulnerability: Remote Yahoo! crash
        http://gaim.sourceforge.net/security/?id=18
  [ 2 ] Gaim Vulnerability: MSN Remote DoS
        http://gaim.sourceforge.net/security/?id=19
  [ 3 ] CAN-2005-1269
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1269
  [ 4 ] CAN-2005-1934
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1934

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

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

  http://security.gentoo.org/glsa/glsa-200506-11.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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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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