[ GLSA 200811-05 ] PHP: Multiple vulnerabilities

[Tobias Heinlein <keytoaster () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200811-05
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: PHP: Multiple vulnerabilities
      Date: November 16, 2008
      Bugs: #209148, #212211, #215266, #228369, #230575, #234102
        ID: 200811-05

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Synopsis
========

PHP contains several vulnerabilities including buffer and integer
overflows which could lead to the remote execution of arbitrary code.

Background
==========

PHP is a widely-used general-purpose scripting language that is
especially suited for Web development and can be embedded into HTML.

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

    -------------------------------------------------------------------
     Package       /  Vulnerable  /                         Unaffected
    -------------------------------------------------------------------
  1  dev-lang/php     < 5.2.6-r6                           >= 5.2.6-r6

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

Several vulnerabilitites were found in PHP:

* PHP ships a vulnerable version of the PCRE library which allows for
  the circumvention of security restrictions or even for remote code
  execution in case of an application which accepts user-supplied
  regular expressions (CVE-2008-0674).

* Multiple crash issues in several PHP functions have been
  discovered.

* Ryan Permeh reported that the init_request_info() function in
  sapi/cgi/cgi_main.c does not properly consider operator precedence
  when calculating the length of PATH_TRANSLATED (CVE-2008-0599).

* An off-by-one error in the metaphone() function may lead to memory
  corruption.

* Maksymilian Arciemowicz of SecurityReason Research reported an
  integer overflow, which is triggerable using printf() and related
  functions (CVE-2008-1384).

* Andrei Nigmatulin reported a stack-based buffer overflow in the
  FastCGI SAPI, which has unknown attack vectors (CVE-2008-2050).

* Stefan Esser reported that PHP does not correctly handle multibyte
  characters inside the escapeshellcmd() function, which is used to
  sanitize user input before its usage in shell commands
  (CVE-2008-2051).

* Stefan Esser reported that a short-coming in PHP's algorithm of
  seeding the random number generator might allow for predictible
  random numbers (CVE-2008-2107, CVE-2008-2108).

* The IMAP extension in PHP uses obsolete c-client API calls making
  it vulnerable to buffer overflows as no bounds checking can be done
  (CVE-2008-2829).

* Tavis Ormandy reported a heap-based buffer overflow in
  pcre_compile.c in the PCRE version shipped by PHP when processing
  user-supplied regular expressions (CVE-2008-2371).

* CzechSec reported that specially crafted font files can lead to an
  overflow in the imageloadfont() function in ext/gd/gd.c, which is
  part of the GD extension (CVE-2008-3658).

* Maksymilian Arciemowicz of SecurityReason Research reported that a
  design error in PHP's stream wrappers allows to circumvent safe_mode
  checks in several filesystem-related PHP functions (CVE-2008-2665,
  CVE-2008-2666).

* Laurent Gaffie discovered a buffer overflow in the internal
  memnstr() function, which is used by the PHP function explode()
  (CVE-2008-3659).

* An error in the FastCGI SAPI when processing a request with
  multiple dots preceding the extension (CVE-2008-3660).

Impact
======

These vulnerabilities might allow a remote attacker to execute
arbitrary code, to cause a Denial of Service, to circumvent security
restrictions, to disclose information, and to manipulate files.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All PHP users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-lang/php-5.2.6-r6"

References
==========

  [ 1 ] CVE-2008-0599
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0599
  [ 2 ] CVE-2008-0674
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0674
  [ 3 ] CVE-2008-1384
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1384
  [ 4 ] CVE-2008-2050
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2050
  [ 5 ] CVE-2008-2051
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2051
  [ 6 ] CVE-2008-2107
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2107
  [ 7 ] CVE-2008-2108
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2108
  [ 8 ] CVE-2008-2371
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2371
  [ 9 ] CVE-2008-2665
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2665
  [ 10 ] CVE-2008-2666
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2666
  [ 11 ] CVE-2008-2829
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2829
  [ 12 ] CVE-2008-3658
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3658
  [ 13 ] CVE-2008-3659
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3659
  [ 14 ] CVE-2008-3660
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3660

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

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

  http://security.gentoo.org/glsa/glsa-200811-05.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

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