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Gentoo Linux Security Advisory                           GLSA 200601-17
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  Severity: Normal
     Title: Xpdf, Poppler, GPdf, libextractor, pdftohtml: Heap
            overflows
      Date: January 30, 2006
      Bugs: #117481, #117494, #117495, #115789, #118665
        ID: 200601-17

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Synopsis
========

Xpdf, Poppler, GPdf, libextractor and pdftohtml are vulnerable to
integer overflows that may be exploited to execute arbitrary code.

Background
==========

Xpdf is a PDF file viewer that runs under the X Window System. Poppler
is a PDF rendering library based on the Xpdf 3.0 code base. GPdf is a
PDF file viewer for the GNOME 2 platform, also based on Xpdf.
libextractor is a library which includes Xpdf code to extract arbitrary
meta-data from files. pdftohtml is a utility to convert PDF files to
HTML or XML formats that makes use of Xpdf code to decode PDF files.

Affected packages
=================

    -------------------------------------------------------------------
     Package                  /   Vulnerable   /            Unaffected
    -------------------------------------------------------------------
  1  app-text/xpdf                 < 3.01-r5                >= 3.01-r5
  2  app-text/poppler             < 0.4.3-r4               >= 0.4.3-r4
  3  app-text/gpdf                < 2.10.0-r3             >= 2.10.0-r3
  4  media-libs/libextractor        < 0.5.9                   >= 0.5.9
  5  app-text/pdftohtml            < 0.36-r4               Vulnerable!
    -------------------------------------------------------------------
     NOTE: Certain packages are still vulnerable. Users should migrate
           to another package if one is available or wait for the
           existing packages to be marked stable by their
           architecture maintainers.
    -------------------------------------------------------------------
     5 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

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

Chris Evans has reported some integer overflows in Xpdf when attempting
to calculate buffer sizes for memory allocation, leading to a heap
overflow and a potential infinite loop when handling malformed input
files.

Impact
======

By sending a specially crafted PDF file to a victim, an attacker could
cause an overflow, potentially resulting in the execution of arbitrary
code with the privileges of the user running the application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Xpdf users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-text/xpdf-3.01-r5"

All Poppler users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-text/poppler-0.4.3-r4"

All GPdf users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-text/gpdf-2.10.0-r3"

All libextractor users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/libextractor-0.5.9"

All pdftohtml users should migrate to the latest stable version of
Poppler.

References
==========

  [ 1 ] CVE-2005-3627
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3627
  [ 2 ] CVE-2005-3626
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3626
  [ 3 ] CVE-2005-3625
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3625
  [ 4 ] CVE-2005-3624
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3624

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

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

  http://security.gentoo.org/glsa/glsa-200601-17.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 2006 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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