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Category:   Application (Generic)  >   abcm2ps Vendors:   Kohn, Michael
(Gentoo Issues Fix) abcm2ps Buffer Overflow in put_words() Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1012613
SecurityTracker URL:  http://securitytracker.com/id/1012613
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Dec 19 2004
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 3.7.20
Description:   A vulnerability was reported in abcm2ps. A remote user can cause arbitrary code to be executed by the target user.

D. J. Bernstein reported that a remote user can create a specially crafted ABC file that, when processed by the target user with abcm2ps, will execute arbitrary code on the target user's system. The code will run with the privileges of the target user.

The buffer overflow resides in the put_words() function in 'subs.c'.

Limin Wang is credited with discovering this flaw.

Impact:   A remote user can cause arbitrary code to be executed by the target user with the privileges of the target user.
Solution:   Gentoo has released a fix and indicates that all abcm2ps users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-sound/abcm2ps-3.7.21"

Vendor URL:  moinejf.free.fr/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Gentoo)

Message History:   This archive entry is a follow-up to the message listed below.
Dec 16 2004 abcm2ps Buffer Overflow in put_words() Lets Remote Users Execute Arbitrary Code



 Source Message Contents

Subject:  [gentoo-announce] [ GLSA 200412-18 ] abcm2ps: Buffer overflow vulnerability



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Gentoo Linux Security Advisory                        GLSA 200412-18:02
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: abcm2ps: Buffer overflow vulnerability
      Date: December 19, 2004
   Updated: December 19, 2004
      Bugs: #74702
        ID: 200412-18:02

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Synopsis
========

abcm2ps is vulnerable to a buffer overflow that could lead to remote
execution of arbitrary code.

Background
==========

abcm2ps is a utility used to convert ABC music sheet files into
PostScript format.

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

    -------------------------------------------------------------------
     Package              /  Vulnerable  /                  Unaffected
    -------------------------------------------------------------------
  1  media-sound/abcm2ps      < 3.7.21                       >= 3.7.21

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

Limin Wang has located a buffer overflow inside the put_words()
function in the abcm2ps code.

Impact
======

A remote attacker could convince the victim to download a
specially-crafted ABC file. Upon execution, this file would trigger the
buffer overflow and lead to the execution of arbitrary code with the
permissions of the user running abcm2ps.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All abcm2ps users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-sound/abcm2ps-3.7.21"

References
==========

  [ 1 ] abcm2ps ChangeLog
        http://moinejf.free.fr/abcm2ps-3.txt
  [ 2 ] Secunia Advisory
        http://secunia.com/advisories/13523/

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

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

  http://security.gentoo.org/glsa/glsa-200412-18.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 2004 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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