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  MPFR library buffer overflow

From:GENTOO
Date:09.03.2009
Subject:[ GLSA 200903-13 ] MPFR: Denial of Service

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Gentoo Linux Security Advisory                           GLSA 200903-13
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                                           http://security.gentoo.org/
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 Severity: Normal
    Title: MPFR: Denial of Service
     Date: March 09, 2009
     Bugs: #260968
       ID: 200903-13

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Synopsis
========

Multiple buffer overflows in MPFR might lead to a Denial of Service.

Background
==========

MPFR is a library for multiple-precision floating-point computations
with exact rounding.

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

   -------------------------------------------------------------------
    Package        /  Vulnerable  /                        Unaffected
   -------------------------------------------------------------------
 1  dev-libs/mpfr       < 2.4.1                              >= 2.4.1

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

Multiple buffer overflows have been reported in the mpfr_snprintf() and
mpfr_vsnprintf() functions.

Impact
======

A remote user could exploit the vulnerability to cause a Denial of
Service in an application using MPFR via unknown vectors.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All MPRF users should upgrade to the latest version:

   # emerge --sync
   # emerge --ask --oneshot --verbose ">=dev-libs/mpfr-2.4.1"

References
==========

 [ 1 ] CVE-2009-0757
       http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0757

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

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

 http://security.gentoo.org/glsa/glsa-200903-13.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 2009 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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