Gentoo: xine-lib Multiple overflows
Posted by Joe Shakespeare   
Gentoo xine-lib contains multiple overflows potentially allowing execution of arbitrary code.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200501-07
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: Normal
     Title: xine-lib: Multiple overflows
      Date: January 06, 2005
      Bugs: #74475
        ID: 200501-07

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

xine-lib contains multiple overflows potentially allowing execution of
arbitrary code.

Background
==========

xine-lib is a multimedia library which can be utilized to create
multimedia frontends.

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

    -------------------------------------------------------------------
     Package              /  Vulnerable  /                  Unaffected
    -------------------------------------------------------------------
  1  media-libs/xine-lib     < 1_rc8-r1                    >= 1_rc8-r1
                                                          *>= 1_rc6-r1

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

Ariel Berkman discovered that xine-lib reads specific input data into
an array without checking the input size in demux_aiff.c, making it
vulnerable to a buffer overflow (CAN-2004-1300) . iDefense discovered
that the PNA_TAG handling code in pnm_get_chunk() does not check if the
input size is larger than the buffer size (CAN-2004-1187). iDefense
also discovered that in this same function, a negative value could be
given to an unsigned variable that specifies the read length of input
data (CAN-2004-1188).

Impact
======

A remote attacker could craft a malicious movie or convince a targeted
user to connect to a malicious PNM server, which could result in the
execution of arbitrary code with the rights of the user running any
xine-lib frontend.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All xine-lib users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose media-libs/xine-lib

References
==========

  [ 1 ] CAN-2004-1187
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1187
  [ 2 ] CAN-2004-1188
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1188
  [ 3 ] CAN-2004-1300
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1300
  [ 4 ] iDefense Advisory

http://www.idefense.com/application/poi/display?id=176&type=vulnerabilities
  [ 5 ] iDefense Advisory

http://www.idefense.com/application/poi/display?id=177&type=vulnerabilities
  [ 6 ] Ariel Berkman Advisory
        http://tigger.uic.edu/~jlongs2/holes/xine-lib.txt

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

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

  http://security.gentoo.org/glsa/glsa-200501-07.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