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UNIRAS Brief - 579/05 - Gentoo - Three Security Advisories



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 579/05 dated 26.07.05  Time: 11:05  
  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.  Fetchmail: Buffer Overflow                      [GLSA 200507-21]
     2.  Sandbox: Insecure temporary file handling       [GLSA 200507-22]
     3.  Kopete: Vulnerability in included Gadu library  [GLSA 200507-23]


Detail
====== 

Security advisory summaries:

     1.  fetchmail is susceptible to a buffer overflow resulting in a Denial of
         Service or arbitrary code execution.

     2.  The sandbox utility may create temporary files in an insecure manner.

     3.  Kopete is vulnerable to several input validation vulnerabilities which
         may lead to execution of arbitrary code.


Security advisory content follows:


1.


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Gentoo Linux Security Advisory                           GLSA 200507-21
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: fetchmail: Buffer Overflow
      Date: July 25, 2005
      Bugs: #99865
        ID: 200507-21

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Synopsis
========

fetchmail is susceptible to a buffer overflow resulting in a Denial of
Service or arbitrary code execution.

Background
==========

fetchmail is a utility that retrieves and forwards mail from remote
systems using IMAP, POP, and other protocols.

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

    -------------------------------------------------------------------
     Package             /  Vulnerable  /                   Unaffected
    -------------------------------------------------------------------
  1  net-mail/fetchmail      < 6.2.5.2                      >= 6.2.5.2

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

fetchmail does not properly validate UIDs coming from a POP3 mail
server. The UID is placed in a fixed length buffer on the stack, which
can be overflown.

Impact
======

Very long UIDs returned from a malicious or compromised POP3 server can
cause fetchmail to crash, resulting in a Denial of Service, or allow
arbitrary code to be placed on the stack.

Workaround
==========

There are no known workarounds at this time.

Resolution
==========

All fetchmail users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-mail/fetchmail-6.2.5.2"

References
==========

  [ 1 ] Fetchmail Security Advisory
        http://fetchmail.berlios.de/fetchmail-SA-2005-01.txt
  [ 2 ] CAN-2005-2335
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2335

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

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

  http://security.gentoo.org/glsa/glsa-200507-21.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 200507-22
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                                            http://security.gentoo.org/
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  Severity: Low
     Title: sandbox: Insecure temporary file handling
      Date: July 25, 2005
      Bugs: #96782
        ID: 200507-22

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Synopsis
========

The sandbox utility may create temporary files in an insecure manner.

Background
==========

sandbox is a Gentoo Linux utility used by the Portage package
management system.

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

    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  1  sys-apps/sandbox      < 1.2.11                          >= 1.2.11

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

The Gentoo Linux Security Audit Team discovered that the sandbox
utility was vulnerable to multiple TOCTOU (Time of Check, Time of Use)
file creation race conditions.

Impact
======

Local users may be able to create or overwrite arbitrary files with the
permissions of the root user.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All sandbox users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-apps/sandbox-1.2.11"

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

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

  http://security.gentoo.org/glsa/glsa-200507-22.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 200507-23
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                                            http://security.gentoo.org/
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  Severity: High
     Title: Kopete: Vulnerability in included Gadu library
      Date: July 25, 2005
      Bugs: #99754
        ID: 200507-23

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Synopsis
========

Kopete is vulnerable to several input validation vulnerabilities which
may lead to execution of arbitrary code.

Background
==========

KDE is a feature-rich graphical desktop environment for Linux and
Unix-like Operating Systems. Kopete (also part of kdenetwork) is the
KDE Instant Messenger.

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

    -------------------------------------------------------------------
     Package              /  Vulnerable  /                  Unaffected
    -------------------------------------------------------------------
  1  kde-base/kdenetwork     < 3.4.1-r1                    >= 3.4.1-r1
                                                          *>= 3.3.2-r2
  2  kde-base/kopete         < 3.4.1-r1                    >= 3.4.1-r1
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

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

Kopete contains an internal copy of libgadu and is therefore subject to
several input validation vulnerabilities in libgadu.

Impact
======

A remote attacker could exploit this vulnerability to execute arbitrary
code or crash Kopete.

Workaround
==========

Delete all Gadu Gadu contacts.

Resolution
==========

All Kopete users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose kde-base/kdenetwork

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

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

References
==========

  [ 1 ] KDE Security Advisory: libgadu vulnerabilities
        http://www.kde.org/info/security/advisory-20050721-1.txt
  [ 2 ] CAN-2005-1852
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1852

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

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

  http://security.gentoo.org/glsa/glsa-200507-23.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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