Gentoo: CUPS Stack overflow in included Xpdf code
Posted by Joseph Shakespeare   
Gentoo CUPS includes Xpdf code and therefore is vulnerable to the recent stack overflow issue, potentially resulting in the remote execution of arbitrary code.
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Gentoo Linux Security Advisory                           GLSA 200501-30
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: CUPS: Stack overflow in included Xpdf code
      Date: January 22, 2005
      Bugs: #78249
        ID: 200501-30

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Synopsis
========

CUPS includes Xpdf code and therefore is vulnerable to the recent stack
overflow issue, potentially resulting in the remote execution of
arbitrary code.

Background
==========

The Common UNIX Printing System (CUPS) is a cross-platform print
spooler. It makes use of Xpdf code to handle PDF files.

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

    -------------------------------------------------------------------
     Package         /   Vulnerable   /                     Unaffected
    -------------------------------------------------------------------
  1  net-print/cups      < 1.1.23-r1                      >= 1.1.23-r1

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

The Decrypt::makeFileKey2 function in Xpdf's Decrypt.cc insufficiently
checks boundaries when processing /Encrypt /Length tags in PDF files
(GLSA 200501-28).

Impact
======

This issue could be exploited by a remote attacker to execute arbitrary
code by sending a malicious print job to a CUPS spooler.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All CUPS users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-print/cups-1.1.23-r1"

References
==========

  [ 1 ] CAN-2005-0064
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0064
  [ 2 ] GLSA 200501-28
        http://www.gentoo.org/security/en/glsa/glsa-200501-28.xml

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

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

  http://security.gentoo.org/glsa/glsa-200501-30.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 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