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Gentoo Linux Security Advisory                           GLSA 200807-16
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Python: Multiple vulnerabilities
      Date: July 31, 2008
      Bugs: #230640, #232137
        ID: 200807-16

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Synopsis
========

Multiple vulnerabilities in Python may allow for the execution of
arbitrary code.

Background
==========

Python is an interpreted, interactive, object-oriented programming
language.

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

    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  dev-lang/python     < 2.5.2-r6                      *>= 2.4.4-r14
                                                           >= 2.5.2-r6

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

Multiple vulnerabilities were discovered in Python:

* David Remahl of Apple Product Security reported several integer
  overflows in core modules such as stringobject, unicodeobject,
  bufferobject, longobject, tupleobject, stropmodule, gcmodule,
  mmapmodule (CVE-2008-2315).

* David Remahl of Apple Product Security also reported an integer
  overflow in the hashlib module, leading to unreliable cryptographic
  digest results (CVE-2008-2316).

* Justin Ferguson reported multiple buffer overflows in unicode
  string processing that only affect 32bit systems (CVE-2008-3142).

* The Google Security Team reported multiple integer overflows
  (CVE-2008-3143).

* Justin Ferguson reported multiple integer underflows and overflows
  in the PyOS_vsnprintf() function, and an off-by-one error when
  passing zero-length strings, leading to memory corruption
  (CVE-2008-3144).

Impact
======

A remote attacker could exploit these vulnerabilities in Python
applications or daemons that pass user-controlled input to vulnerable
functions. Exploitation might lead to the execution of arbitrary code
or a Denial of Service. Vulnerabilities within the hashlib might lead
to weakened cryptographic protection of data integrity or authenticity.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Python 2.4 users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-lang/python-2.4.4-r14"

All Python 2.5 users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-lang/python-2.5.2-r6"

Please note that Python 2.3 is masked since June 24, and we will not be
releasing updates to it. It will be removed from the tree in the near
future.

References
==========

  [ 1 ] CVE-2008-2315
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2315
  [ 2 ] CVE-2008-2316
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2316
  [ 3 ] CVE-2008-3142
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3142
  [ 4 ] CVE-2008-3143
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3143
  [ 5 ] CVE-2008-3144
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3144

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

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

  http://security.gentoo.org/glsa/glsa-200807-16.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@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2008 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/2.5