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UNIRAS Brief - 605/05 - Gentoo - AMD64 x86 emulation base libraries; ProFTPD; nbSMTP



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 605/05 dated 05.08.05  Time: 09:44
  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 Linux Security Advisories 
AMD64 x86 emulation base libraries: Buffer overflow
ProFTPD: Format string vulnerabilities
nbSMTP: Format string vulnerability

Detail
====== 
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Gentoo Linux Security Advisory                           GLSA 200507-28
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                                            http://security.gentoo.org/
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  Severity: High
     Title: AMD64 x86 emulation base libraries: Buffer overflow
      Date: July 30, 2005
      Bugs: #100686
        ID: 200507-28

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Synopsis
========

The x86 emulation base libraries for AMD64 contain a vulnerable version
of zlib which could potentially lead to execution of arbitrary code.

Background
==========

The x86 emulation base libraries for AMD64 emulate the x86 (32-bit)
architecture on the AMD64 (64-bit) architecture.

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

    -------------------------------------------------------------------
     Package                  /  Vulnerable  /              Unaffected
    -------------------------------------------------------------------
  1  emul-linux-x86-baselibs        < 2.2                       >= 2.2
    -------------------------------------------------------------------
     # Package 1 only applies to AMD64 users.

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

Earlier versions of emul-linux-x86-baselibs contain a vulnerable
version of zlib, which may lead to a buffer overflow.

Impact
======

By creating a specially crafted compressed data stream, attackers can
overwrite data structures for applications that use the x86 emulation
base libraries for AMD64, resulting in a Denial of Service and
potentially arbitrary code execution.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All AMD64 x86 emulation base libraries users should upgrade to the
latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose
">=app-emulation/emul-linux-x86-baselibs-2.2"

References
==========

  [ 1 ] GLSA 200507-05
        http://www.gentoo.org/security/en/glsa/glsa-200507-05.xml
  [ 2 ] GLSA 200507-19
        http://www.gentoo.org/security/en/glsa/glsa-200507-19.xml
  [ 3 ] CAN-2005-1849
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1849
  [ 4 ] 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-200507-28.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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Gentoo Linux Security Advisory                           GLSA 200508-02
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: ProFTPD: Format string vulnerabilities
      Date: August 01, 2005
      Bugs: #100364
        ID: 200508-02

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Synopsis
========

Under specific circumstances, ProFTPD is vulnerable to format string
vulnerabilities, potentially resulting in the execution of arbitrary
code.

Background
==========

ProFTPD is a configurable GPL-licensed FTP server software.

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

    -------------------------------------------------------------------
     Package          /   Vulnerable   /                    Unaffected
    -------------------------------------------------------------------
  1  net-ftp/proftpd      < 1.2.10-r7                     >= 1.2.10-r7

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

"infamous42md" reported that ProFTPD is vulnerable to format string
vulnerabilities when displaying a shutdown message containing the name
of the current directory, and when displaying response messages to the
client using information retrieved from a database using mod_sql.

Impact
======

A remote attacker could create a directory with a malicious name that
would trigger the format string issue if specific variables are used in
the shutdown message, potentially resulting in a Denial of Service or
the execution of arbitrary code with the rights of the user running the
ProFTPD server. An attacker with control over the database contents
could achieve the same result by introducing malicious messages that
would trigger the other format string issue when used in server
responses.

Workaround
==========

Do not use the "%C", "%R", or "%U" in shutdown messages, and do not set
the "SQLShowInfo" directive.

Resolution
==========

All ProFTPD users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-ftp/proftpd-1.2.10-r7"

References
==========

  [ 1 ] CAN-2005-2390
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2390

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

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

  http://security.gentoo.org/glsa/glsa-200508-02.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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Gentoo Linux Security Advisory                           GLSA 200508-03
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: nbSMTP: Format string vulnerability
      Date: August 02, 2005
      Bugs: #100274
        ID: 200508-03

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Synopsis
========

nbSMTP is vulnerable to a format string vulnerability which may result
in remote execution of arbitrary code.

Background
==========

nbSMTP is an SMTP client suitable to run in chroot jails, in embedded
systems, laptops and workstations.

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

    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  mail-mta/nbsmtp       < 1.00                              >= 1.00

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

Niels Heinen discovered a format string vulnerability.

Impact
======

An attacker can setup a malicious SMTP server and exploit this
vulnerability to execute arbitrary code with the permissions of the
user running nbSMTP.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All nbSMTP users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=mail-mta/nbsmtp-1.0"

References
==========

  [ 1 ] nbSMTP official site
        http://nbsmtp.ferdyx.org/

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

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

  http://security.gentoo.org/glsa/glsa-200508-03.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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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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